/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 NUM_VARIABLES --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/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:11:20,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:11:20,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:11:20,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 01:11:20,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:11:20,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:11:20,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:11:20,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:11:20,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:11:20,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:11:20,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:11:20,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:11:20,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:11:20,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:11:20,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:11:20,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:11:20,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:11:20,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:11:20,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:11:20,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:11:20,583 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 01:11:20,599 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:11:20,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:11:20,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:11:20,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:11:20,601 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:11:20,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:11:20,602 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:11:20,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:11:20,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:11:20,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:11:20,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:11:20,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:11:20,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:11:20,603 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:11:20,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:11:20,603 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:11:20,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:11:20,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:11:20,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:11:20,604 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:11:20,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:11:20,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:11:20,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:11:20,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:11:20,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:11:20,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:11:20,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:11:20,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:11:20,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:11:20,606 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES 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 01:11:20,902 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:11:20,916 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:11:20,920 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:11:20,922 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:11:20,922 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:11:20,923 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-20 01:11:21,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d30ee7dde/f5e1bdab3ae54449b9fdb9b9d85c32e4/FLAG3c1c064b3 [2020-07-20 01:11:21,479 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:11:21,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-20 01:11:21,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d30ee7dde/f5e1bdab3ae54449b9fdb9b9d85c32e4/FLAG3c1c064b3 [2020-07-20 01:11:21,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d30ee7dde/f5e1bdab3ae54449b9fdb9b9d85c32e4 [2020-07-20 01:11:21,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:11:21,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:11:21,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:11:21,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:11:21,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:11:21,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:11:21" (1/1) ... [2020-07-20 01:11:21,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@381aa529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:21, skipping insertion in model container [2020-07-20 01:11:21,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:11:21" (1/1) ... [2020-07-20 01:11:21,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:11:21,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:11:22,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:11:22,071 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:11:22,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:11:22,105 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:11:22,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:22 WrapperNode [2020-07-20 01:11:22,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:11:22,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:11:22,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:11:22,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:11:22,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:22" (1/1) ... [2020-07-20 01:11:22,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:22" (1/1) ... [2020-07-20 01:11:22,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:22" (1/1) ... [2020-07-20 01:11:22,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:22" (1/1) ... [2020-07-20 01:11:22,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:22" (1/1) ... [2020-07-20 01:11:22,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:22" (1/1) ... [2020-07-20 01:11:22,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:22" (1/1) ... [2020-07-20 01:11:22,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:11:22,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:11:22,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:11:22,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:11:22,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:22" (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 01:11:22,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:11:22,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:11:22,288 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-07-20 01:11:22,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:11:22,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:11:22,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:11:22,288 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-07-20 01:11:22,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:11:22,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:11:22,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:11:22,493 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:11:22,493 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 01:11:22,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:11:22 BoogieIcfgContainer [2020-07-20 01:11:22,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:11:22,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:11:22,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:11:22,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:11:22,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:11:21" (1/3) ... [2020-07-20 01:11:22,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4f3d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:11:22, skipping insertion in model container [2020-07-20 01:11:22,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:22" (2/3) ... [2020-07-20 01:11:22,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4f3d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:11:22, skipping insertion in model container [2020-07-20 01:11:22,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:11:22" (3/3) ... [2020-07-20 01:11:22,509 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-07-20 01:11:22,520 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:11:22,530 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:11:22,553 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:11:22,593 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:11:22,594 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:11:22,594 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:11:22,594 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:11:22,597 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:11:22,597 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:11:22,597 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:11:22,598 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:11:22,624 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 01:11:22,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 01:11:22,638 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:22,639 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:22,640 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:22,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:22,658 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-07-20 01:11:22,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:22,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930304483] [2020-07-20 01:11:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:11:22,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930304483] [2020-07-20 01:11:22,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629683715] [2020-07-20 01:11:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@578913ef 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 01:11:22,978 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@578913ef issued 2 check-sat command(s) [2020-07-20 01:11:22,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:22,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 01:11:22,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:11:23,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:23,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-20 01:11:23,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152820980] [2020-07-20 01:11:23,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:11:23,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:23,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:11:23,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:11:23,085 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-07-20 01:11:23,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:23,220 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-07-20 01:11:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:11:23,222 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-20 01:11:23,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:23,234 INFO L225 Difference]: With dead ends: 41 [2020-07-20 01:11:23,234 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 01:11:23,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:11:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 01:11:23,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 01:11:23,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 01:11:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-20 01:11:23,283 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-07-20 01:11:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:23,284 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-20 01:11:23,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:11:23,284 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-20 01:11:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 01:11:23,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:23,287 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:23,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-20 01:11:23,500 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:23,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:23,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-07-20 01:11:23,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:23,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735153123] [2020-07-20 01:11:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 01:11:23,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735153123] [2020-07-20 01:11:23,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:11:23,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:11:23,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120661520] [2020-07-20 01:11:23,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:11:23,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:23,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:11:23,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:11:23,661 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-07-20 01:11:23,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:23,730 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-20 01:11:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:11:23,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-07-20 01:11:23,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:23,733 INFO L225 Difference]: With dead ends: 29 [2020-07-20 01:11:23,733 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 01:11:23,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:11:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 01:11:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 01:11:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 01:11:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-07-20 01:11:23,743 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-07-20 01:11:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:23,743 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-07-20 01:11:23,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:11:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-07-20 01:11:23,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 01:11:23,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:23,746 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:23,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:11:23,747 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:23,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:23,747 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-07-20 01:11:23,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:23,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22977073] [2020-07-20 01:11:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 01:11:24,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22977073] [2020-07-20 01:11:24,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779274441] [2020-07-20 01:11:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a5b83ee 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 01:11:24,194 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a5b83ee issued 4 check-sat command(s) [2020-07-20 01:11:24,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:24,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 01:11:24,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 01:11:24,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:24,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-07-20 01:11:24,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162857520] [2020-07-20 01:11:24,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 01:11:24,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:24,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 01:11:24,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-07-20 01:11:24,466 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 21 states. [2020-07-20 01:11:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:25,094 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-07-20 01:11:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 01:11:25,095 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-07-20 01:11:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:25,097 INFO L225 Difference]: With dead ends: 43 [2020-07-20 01:11:25,098 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 01:11:25,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2020-07-20 01:11:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 01:11:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-07-20 01:11:25,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 01:11:25,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-07-20 01:11:25,122 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-07-20 01:11:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:25,123 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-07-20 01:11:25,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 01:11:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-07-20 01:11:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 01:11:25,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:25,129 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:25,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:25,331 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:25,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:25,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-07-20 01:11:25,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:25,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089450385] [2020-07-20 01:11:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-20 01:11:25,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089450385] [2020-07-20 01:11:25,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251661243] [2020-07-20 01:11:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e3f6afe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:25,477 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e3f6afe issued 4 check-sat command(s) [2020-07-20 01:11:25,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:25,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:11:25,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-20 01:11:25,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:25,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 01:11:25,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137949345] [2020-07-20 01:11:25,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:11:25,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:25,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:11:25,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:11:25,519 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 9 states. [2020-07-20 01:11:25,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:25,619 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-07-20 01:11:25,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:11:25,620 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-07-20 01:11:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:25,621 INFO L225 Difference]: With dead ends: 54 [2020-07-20 01:11:25,621 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 01:11:25,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:11:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 01:11:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 01:11:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 01:11:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-07-20 01:11:25,630 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2020-07-20 01:11:25,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:25,631 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-07-20 01:11:25,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:11:25,631 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-07-20 01:11:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 01:11:25,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:25,633 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:25,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:25,849 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:25,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-07-20 01:11:25,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:25,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034526855] [2020-07-20 01:11:25,852 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 01:11:26,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034526855] [2020-07-20 01:11:26,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792475096] [2020-07-20 01:11:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fed2d07 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 01:11:26,323 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fed2d07 issued 4 check-sat command(s) [2020-07-20 01:11:26,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:26,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 01:11:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 01:11:26,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:26,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-07-20 01:11:26,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195144598] [2020-07-20 01:11:26,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 01:11:26,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:26,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 01:11:26,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-07-20 01:11:26,820 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 32 states. [2020-07-20 01:11:27,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:27,489 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-07-20 01:11:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 01:11:27,489 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 44 [2020-07-20 01:11:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:27,491 INFO L225 Difference]: With dead ends: 39 [2020-07-20 01:11:27,491 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 01:11:27,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 01:11:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 01:11:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-07-20 01:11:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 01:11:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-07-20 01:11:27,500 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 44 [2020-07-20 01:11:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:27,501 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-07-20 01:11:27,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 01:11:27,501 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-07-20 01:11:27,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 01:11:27,502 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:27,503 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:27,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:27,718 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:27,719 INFO L82 PathProgramCache]: Analyzing trace with hash 430867302, now seen corresponding path program 4 times [2020-07-20 01:11:27,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:27,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498931435] [2020-07-20 01:11:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-20 01:11:28,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498931435] [2020-07-20 01:11:28,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926509329] [2020-07-20 01:11:28,191 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28f3d978 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:28,229 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28f3d978 issued 4 check-sat command(s) [2020-07-20 01:11:28,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:28,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 69 conjunts are in the unsatisfiable core [2020-07-20 01:11:28,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-20 01:11:28,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:28,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2020-07-20 01:11:28,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409007100] [2020-07-20 01:11:28,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 01:11:28,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:28,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 01:11:28,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 01:11:28,861 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 36 states. [2020-07-20 01:11:29,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:29,731 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-20 01:11:29,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 01:11:29,731 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 51 [2020-07-20 01:11:29,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:29,734 INFO L225 Difference]: With dead ends: 42 [2020-07-20 01:11:29,734 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 01:11:29,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=196, Invalid=1966, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 01:11:29,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 01:11:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-07-20 01:11:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 01:11:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-07-20 01:11:29,745 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 51 [2020-07-20 01:11:29,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:29,746 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-07-20 01:11:29,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 01:11:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-07-20 01:11:29,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 01:11:29,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:29,748 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:29,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 01:11:29,961 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:29,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:29,962 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 5 times [2020-07-20 01:11:29,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:29,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186907541] [2020-07-20 01:11:29,963 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-07-20 01:11:30,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186907541] [2020-07-20 01:11:30,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549778581] [2020-07-20 01:11:30,536 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@438a439c 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 01:11:30,581 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@438a439c issued 4 check-sat command(s) [2020-07-20 01:11:30,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:30,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 81 conjunts are in the unsatisfiable core [2020-07-20 01:11:30,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-20 01:11:31,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:31,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2020-07-20 01:11:31,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790268884] [2020-07-20 01:11:31,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 01:11:31,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:31,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 01:11:31,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1451, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 01:11:31,358 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 40 states. [2020-07-20 01:11:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:32,607 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-07-20 01:11:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 01:11:32,608 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 58 [2020-07-20 01:11:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:32,610 INFO L225 Difference]: With dead ends: 45 [2020-07-20 01:11:32,611 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 01:11:32,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=226, Invalid=2530, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 01:11:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 01:11:32,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-07-20 01:11:32,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 01:11:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-07-20 01:11:32,622 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 58 [2020-07-20 01:11:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:32,623 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-07-20 01:11:32,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 01:11:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-07-20 01:11:32,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 01:11:32,624 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:32,624 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:32,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:32,838 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:32,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:32,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1872336740, now seen corresponding path program 6 times [2020-07-20 01:11:32,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:32,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165698832] [2020-07-20 01:11:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-07-20 01:11:33,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165698832] [2020-07-20 01:11:33,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716321551] [2020-07-20 01:11:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@647ec21c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:33,190 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@647ec21c issued 4 check-sat command(s) [2020-07-20 01:11:33,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:33,194 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 73 conjunts are in the unsatisfiable core [2020-07-20 01:11:33,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-07-20 01:11:33,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:33,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2020-07-20 01:11:33,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306341327] [2020-07-20 01:11:33,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 01:11:33,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:33,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 01:11:33,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-07-20 01:11:33,444 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 24 states. [2020-07-20 01:11:33,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:33,970 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-07-20 01:11:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 01:11:33,971 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-07-20 01:11:33,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:33,974 INFO L225 Difference]: With dead ends: 49 [2020-07-20 01:11:33,974 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 01:11:33,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 01:11:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 01:11:33,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-07-20 01:11:33,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 01:11:33,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-07-20 01:11:33,984 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 51 [2020-07-20 01:11:33,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:33,985 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-07-20 01:11:33,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 01:11:33,985 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-07-20 01:11:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 01:11:33,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:33,987 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:34,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:34,192 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:34,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:34,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1605933725, now seen corresponding path program 7 times [2020-07-20 01:11:34,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:34,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73652631] [2020-07-20 01:11:34,194 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-07-20 01:11:34,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73652631] [2020-07-20 01:11:34,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161308120] [2020-07-20 01:11:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d17204 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 01:11:34,801 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d17204 issued 4 check-sat command(s) [2020-07-20 01:11:34,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:34,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 84 conjunts are in the unsatisfiable core [2020-07-20 01:11:34,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 62 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-07-20 01:11:35,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:35,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 35 [2020-07-20 01:11:35,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822886792] [2020-07-20 01:11:35,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 01:11:35,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:35,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 01:11:35,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 01:11:35,391 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 35 states. [2020-07-20 01:11:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:36,190 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-07-20 01:11:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 01:11:36,191 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 58 [2020-07-20 01:11:36,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:36,193 INFO L225 Difference]: With dead ends: 47 [2020-07-20 01:11:36,193 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 01:11:36,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=177, Invalid=1715, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 01:11:36,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 01:11:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-07-20 01:11:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 01:11:36,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2020-07-20 01:11:36,209 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 58 [2020-07-20 01:11:36,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:36,209 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2020-07-20 01:11:36,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 01:11:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2020-07-20 01:11:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 01:11:36,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:36,211 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:36,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 01:11:36,419 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:36,420 INFO L82 PathProgramCache]: Analyzing trace with hash 921134702, now seen corresponding path program 8 times [2020-07-20 01:11:36,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:36,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609312269] [2020-07-20 01:11:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-20 01:11:37,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609312269] [2020-07-20 01:11:37,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037849147] [2020-07-20 01:11:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7569de73 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:37,079 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7569de73 issued 4 check-sat command(s) [2020-07-20 01:11:37,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:37,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-20 01:11:37,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 79 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-20 01:11:37,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:37,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17] total 37 [2020-07-20 01:11:37,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525843874] [2020-07-20 01:11:37,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 01:11:37,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:37,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 01:11:37,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 01:11:37,719 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 37 states. [2020-07-20 01:11:38,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:38,695 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-07-20 01:11:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 01:11:38,696 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 65 [2020-07-20 01:11:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:38,697 INFO L225 Difference]: With dead ends: 47 [2020-07-20 01:11:38,697 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 01:11:38,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=184, Invalid=2072, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 01:11:38,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 01:11:38,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-07-20 01:11:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 01:11:38,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-07-20 01:11:38,707 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 65 [2020-07-20 01:11:38,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:38,708 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-07-20 01:11:38,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 01:11:38,709 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-07-20 01:11:38,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 01:11:38,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:38,710 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:38,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:38,924 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:38,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:38,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 9 times [2020-07-20 01:11:38,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:38,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366127374] [2020-07-20 01:11:38,926 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-20 01:11:39,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366127374] [2020-07-20 01:11:39,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958544771] [2020-07-20 01:11:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e435c6d 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 01:11:39,584 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e435c6d issued 4 check-sat command(s) [2020-07-20 01:11:39,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:39,589 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 93 conjunts are in the unsatisfiable core [2020-07-20 01:11:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 32 proven. 80 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-07-20 01:11:40,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:40,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2020-07-20 01:11:40,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650810575] [2020-07-20 01:11:40,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-20 01:11:40,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:40,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-20 01:11:40,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1773, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 01:11:40,562 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 44 states. [2020-07-20 01:11:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:42,007 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-07-20 01:11:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 01:11:42,008 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 65 [2020-07-20 01:11:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:42,009 INFO L225 Difference]: With dead ends: 50 [2020-07-20 01:11:42,009 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 01:11:42,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=256, Invalid=3166, Unknown=0, NotChecked=0, Total=3422 [2020-07-20 01:11:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 01:11:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-07-20 01:11:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 01:11:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-07-20 01:11:42,019 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 65 [2020-07-20 01:11:42,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:42,020 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-07-20 01:11:42,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-20 01:11:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-07-20 01:11:42,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-20 01:11:42,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:42,021 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:42,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:42,232 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:42,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 10 times [2020-07-20 01:11:42,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:42,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311628390] [2020-07-20 01:11:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-20 01:11:43,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311628390] [2020-07-20 01:11:43,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691807602] [2020-07-20 01:11:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5daf9121 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:43,091 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5daf9121 issued 4 check-sat command(s) [2020-07-20 01:11:43,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:43,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 109 conjunts are in the unsatisfiable core [2020-07-20 01:11:43,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 10 proven. 103 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-07-20 01:11:43,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:43,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 41 [2020-07-20 01:11:43,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457671874] [2020-07-20 01:11:43,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-20 01:11:43,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:43,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-20 01:11:43,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1534, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 01:11:43,844 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 41 states. [2020-07-20 01:11:45,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:45,126 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-07-20 01:11:45,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 01:11:45,127 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 72 [2020-07-20 01:11:45,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:45,129 INFO L225 Difference]: With dead ends: 50 [2020-07-20 01:11:45,129 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 01:11:45,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=210, Invalid=2652, Unknown=0, NotChecked=0, Total=2862 [2020-07-20 01:11:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 01:11:45,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-20 01:11:45,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 01:11:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-07-20 01:11:45,140 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 72 [2020-07-20 01:11:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:45,141 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-07-20 01:11:45,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-20 01:11:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-07-20 01:11:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 01:11:45,142 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:45,142 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:45,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 01:11:45,357 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:45,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2039564078, now seen corresponding path program 11 times [2020-07-20 01:11:45,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:45,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341078221] [2020-07-20 01:11:45,359 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-20 01:11:46,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341078221] [2020-07-20 01:11:46,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772611944] [2020-07-20 01:11:46,246 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d8493b2 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 01:11:46,293 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d8493b2 issued 4 check-sat command(s) [2020-07-20 01:11:46,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:46,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-20 01:11:46,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-07-20 01:11:47,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:47,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19] total 43 [2020-07-20 01:11:47,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214231590] [2020-07-20 01:11:47,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-20 01:11:47,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:47,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-20 01:11:47,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1694, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 01:11:47,118 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 43 states. [2020-07-20 01:11:48,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:48,765 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-07-20 01:11:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 01:11:48,766 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 79 [2020-07-20 01:11:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:48,767 INFO L225 Difference]: With dead ends: 52 [2020-07-20 01:11:48,768 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 01:11:48,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=230, Invalid=3076, Unknown=0, NotChecked=0, Total=3306 [2020-07-20 01:11:48,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 01:11:48,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-20 01:11:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 01:11:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-07-20 01:11:48,788 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 79 [2020-07-20 01:11:48,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:48,789 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-07-20 01:11:48,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-20 01:11:48,789 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-07-20 01:11:48,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-20 01:11:48,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:48,794 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:48,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 01:11:48,995 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:48,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:48,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 12 times [2020-07-20 01:11:48,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:48,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788467507] [2020-07-20 01:11:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-20 01:11:49,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788467507] [2020-07-20 01:11:49,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999965087] [2020-07-20 01:11:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30116d77 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:49,875 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30116d77 issued 4 check-sat command(s) [2020-07-20 01:11:49,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:49,878 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 105 conjunts are in the unsatisfiable core [2020-07-20 01:11:49,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 37 proven. 104 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-20 01:11:51,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:51,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2020-07-20 01:11:51,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907868768] [2020-07-20 01:11:51,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-20 01:11:51,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:51,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-20 01:11:51,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2127, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 01:11:51,044 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 48 states. [2020-07-20 01:11:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:52,991 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-07-20 01:11:52,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 01:11:52,992 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 72 [2020-07-20 01:11:52,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:52,994 INFO L225 Difference]: With dead ends: 53 [2020-07-20 01:11:52,995 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 01:11:52,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=286, Invalid=3874, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 01:11:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 01:11:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-07-20 01:11:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 01:11:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-07-20 01:11:53,004 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 72 [2020-07-20 01:11:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:53,005 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-07-20 01:11:53,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-20 01:11:53,005 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-07-20 01:11:53,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 01:11:53,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:53,006 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:53,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 01:11:53,222 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:53,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:53,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1806425208, now seen corresponding path program 13 times [2020-07-20 01:11:53,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:53,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280388374] [2020-07-20 01:11:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-20 01:11:54,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280388374] [2020-07-20 01:11:54,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552937703] [2020-07-20 01:11:54,181 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b7d535 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 01:11:54,225 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b7d535 issued 4 check-sat command(s) [2020-07-20 01:11:54,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:54,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-20 01:11:54,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-07-20 01:11:55,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:55,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21] total 45 [2020-07-20 01:11:55,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012417285] [2020-07-20 01:11:55,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 01:11:55,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:55,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 01:11:55,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1864, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 01:11:55,190 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 45 states. [2020-07-20 01:11:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:56,864 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-07-20 01:11:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 01:11:56,865 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 79 [2020-07-20 01:11:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:56,867 INFO L225 Difference]: With dead ends: 55 [2020-07-20 01:11:56,867 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 01:11:56,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=236, Invalid=3304, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 01:11:56,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 01:11:56,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-07-20 01:11:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 01:11:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-07-20 01:11:56,877 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 79 [2020-07-20 01:11:56,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:56,877 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-07-20 01:11:56,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 01:11:56,878 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-07-20 01:11:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 01:11:56,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:56,879 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:57,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:57,093 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:57,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:57,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1615348441, now seen corresponding path program 14 times [2020-07-20 01:11:57,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:57,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108999605] [2020-07-20 01:11:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:11:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-20 01:11:58,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108999605] [2020-07-20 01:11:58,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254230803] [2020-07-20 01:11:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73b4b70 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:58,181 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73b4b70 issued 4 check-sat command(s) [2020-07-20 01:11:58,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:58,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-20 01:11:58,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 12 proven. 159 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-07-20 01:11:59,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:59,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21] total 47 [2020-07-20 01:11:59,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891749493] [2020-07-20 01:11:59,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-20 01:11:59,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:59,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-20 01:11:59,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2040, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 01:11:59,381 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 47 states. [2020-07-20 01:12:01,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:01,215 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-07-20 01:12:01,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 01:12:01,216 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 86 [2020-07-20 01:12:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:01,218 INFO L225 Difference]: With dead ends: 53 [2020-07-20 01:12:01,218 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 01:12:01,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=244, Invalid=3538, Unknown=0, NotChecked=0, Total=3782 [2020-07-20 01:12:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 01:12:01,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-20 01:12:01,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 01:12:01,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-07-20 01:12:01,227 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 86 [2020-07-20 01:12:01,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:01,228 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-07-20 01:12:01,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-20 01:12:01,228 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-07-20 01:12:01,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 01:12:01,229 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:01,229 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:01,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 01:12:01,445 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:01,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:01,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1524702692, now seen corresponding path program 15 times [2020-07-20 01:12:01,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:01,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361158353] [2020-07-20 01:12:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:12:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 134 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-07-20 01:12:01,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361158353] [2020-07-20 01:12:01,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281947467] [2020-07-20 01:12:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d53d7a 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 01:12:02,022 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d53d7a issued 4 check-sat command(s) [2020-07-20 01:12:02,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:02,025 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-20 01:12:02,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 8 proven. 128 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-07-20 01:12:02,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:02,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2020-07-20 01:12:02,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280474565] [2020-07-20 01:12:02,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 01:12:02,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:02,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 01:12:02,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2020-07-20 01:12:02,593 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 32 states. [2020-07-20 01:12:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:03,778 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-07-20 01:12:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 01:12:03,779 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 79 [2020-07-20 01:12:03,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:03,780 INFO L225 Difference]: With dead ends: 55 [2020-07-20 01:12:03,780 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 01:12:03,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 01:12:03,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 01:12:03,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-07-20 01:12:03,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 01:12:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2020-07-20 01:12:03,788 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 79 [2020-07-20 01:12:03,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:03,788 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2020-07-20 01:12:03,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 01:12:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2020-07-20 01:12:03,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 01:12:03,790 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:03,790 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:03,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 01:12:03,994 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:03,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:03,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1937884195, now seen corresponding path program 16 times [2020-07-20 01:12:03,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:03,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230171460] [2020-07-20 01:12:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:12:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-20 01:12:05,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230171460] [2020-07-20 01:12:05,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999267821] [2020-07-20 01:12:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@197ce0f7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:05,235 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@197ce0f7 issued 4 check-sat command(s) [2020-07-20 01:12:05,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:05,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-20 01:12:05,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 10 proven. 158 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2020-07-20 01:12:06,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:06,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 19] total 45 [2020-07-20 01:12:06,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200803520] [2020-07-20 01:12:06,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 01:12:06,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:06,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 01:12:06,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1862, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 01:12:06,600 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand 45 states. [2020-07-20 01:12:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:08,076 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-07-20 01:12:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 01:12:08,077 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 86 [2020-07-20 01:12:08,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:08,079 INFO L225 Difference]: With dead ends: 53 [2020-07-20 01:12:08,079 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 01:12:08,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=226, Invalid=3080, Unknown=0, NotChecked=0, Total=3306 [2020-07-20 01:12:08,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 01:12:08,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-07-20 01:12:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 01:12:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-07-20 01:12:08,087 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 86 [2020-07-20 01:12:08,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:08,088 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-07-20 01:12:08,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 01:12:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-07-20 01:12:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 01:12:08,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:08,089 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:08,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 01:12:08,290 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:08,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:08,290 INFO L82 PathProgramCache]: Analyzing trace with hash -335786642, now seen corresponding path program 17 times [2020-07-20 01:12:08,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:08,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148673650] [2020-07-20 01:12:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:12:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-20 01:12:09,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148673650] [2020-07-20 01:12:09,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888721350] [2020-07-20 01:12:09,622 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b27266b 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 01:12:09,684 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b27266b issued 4 check-sat command(s) [2020-07-20 01:12:09,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:09,689 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-20 01:12:09,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 12 proven. 191 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-20 01:12:10,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:10,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 21] total 49 [2020-07-20 01:12:10,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975454228] [2020-07-20 01:12:10,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-20 01:12:10,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:10,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-20 01:12:10,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2224, Unknown=0, NotChecked=0, Total=2352 [2020-07-20 01:12:10,966 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 49 states. [2020-07-20 01:12:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:13,001 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-07-20 01:12:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 01:12:13,002 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 93 [2020-07-20 01:12:13,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:13,004 INFO L225 Difference]: With dead ends: 53 [2020-07-20 01:12:13,004 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 01:12:13,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=252, Invalid=3780, Unknown=0, NotChecked=0, Total=4032 [2020-07-20 01:12:13,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 01:12:13,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-20 01:12:13,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 01:12:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-07-20 01:12:13,012 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 93 [2020-07-20 01:12:13,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:13,012 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-07-20 01:12:13,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-20 01:12:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-07-20 01:12:13,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 01:12:13,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:13,014 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:13,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:13,228 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 18 times [2020-07-20 01:12:13,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:13,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110848544] [2020-07-20 01:12:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:12:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-20 01:12:14,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110848544] [2020-07-20 01:12:14,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006376149] [2020-07-20 01:12:14,122 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@391c39f3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:14,173 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@391c39f3 issued 4 check-sat command(s) [2020-07-20 01:12:14,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:14,177 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 117 conjunts are in the unsatisfiable core [2020-07-20 01:12:14,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 42 proven. 131 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-07-20 01:12:15,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:15,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 52 [2020-07-20 01:12:15,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415436430] [2020-07-20 01:12:15,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-20 01:12:15,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:15,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-20 01:12:15,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2513, Unknown=0, NotChecked=0, Total=2652 [2020-07-20 01:12:15,769 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 52 states. [2020-07-20 01:12:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:18,731 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-07-20 01:12:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 01:12:18,732 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 79 [2020-07-20 01:12:18,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:18,734 INFO L225 Difference]: With dead ends: 56 [2020-07-20 01:12:18,734 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 01:12:18,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=316, Invalid=4654, Unknown=0, NotChecked=0, Total=4970 [2020-07-20 01:12:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 01:12:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-07-20 01:12:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:12:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-20 01:12:18,742 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 79 [2020-07-20 01:12:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:18,743 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-20 01:12:18,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-20 01:12:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-20 01:12:18,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 01:12:18,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:18,745 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:18,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:18,950 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:18,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:18,951 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 19 times [2020-07-20 01:12:18,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:18,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681404206] [2020-07-20 01:12:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:12:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-20 01:12:20,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681404206] [2020-07-20 01:12:20,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882668464] [2020-07-20 01:12:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29412307 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:20,237 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29412307 issued 4 check-sat command(s) [2020-07-20 01:12:20,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:20,240 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-20 01:12:20,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 14 proven. 160 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-07-20 01:12:21,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:21,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 23] total 49 [2020-07-20 01:12:21,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135076479] [2020-07-20 01:12:21,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-20 01:12:21,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:21,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-20 01:12:21,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2226, Unknown=0, NotChecked=0, Total=2352 [2020-07-20 01:12:21,582 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 49 states. [2020-07-20 01:12:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:23,814 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-07-20 01:12:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 01:12:23,815 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 86 [2020-07-20 01:12:23,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:23,816 INFO L225 Difference]: With dead ends: 58 [2020-07-20 01:12:23,816 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 01:12:23,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=262, Invalid=4028, Unknown=0, NotChecked=0, Total=4290 [2020-07-20 01:12:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 01:12:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-07-20 01:12:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:12:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-20 01:12:23,824 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 86 [2020-07-20 01:12:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:23,825 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-20 01:12:23,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-20 01:12:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-20 01:12:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 01:12:23,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:23,827 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:24,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-20 01:12:24,050 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:24,051 INFO L82 PathProgramCache]: Analyzing trace with hash -313052920, now seen corresponding path program 20 times [2020-07-20 01:12:24,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:24,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911508695] [2020-07-20 01:12:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:12:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-20 01:12:25,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911508695] [2020-07-20 01:12:25,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424629758] [2020-07-20 01:12:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e72ef51 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:25,579 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e72ef51 issued 4 check-sat command(s) [2020-07-20 01:12:25,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:25,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 144 conjunts are in the unsatisfiable core [2020-07-20 01:12:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 22 proven. 206 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-20 01:12:27,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:27,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27] total 53 [2020-07-20 01:12:27,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715915757] [2020-07-20 01:12:27,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-20 01:12:27,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:27,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-20 01:12:27,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2613, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 01:12:27,499 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 53 states. [2020-07-20 01:12:30,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:30,326 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-07-20 01:12:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 01:12:30,330 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 93 [2020-07-20 01:12:30,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:30,331 INFO L225 Difference]: With dead ends: 58 [2020-07-20 01:12:30,331 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 01:12:30,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=297, Invalid=4533, Unknown=0, NotChecked=0, Total=4830 [2020-07-20 01:12:30,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 01:12:30,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-07-20 01:12:30,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:12:30,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-20 01:12:30,338 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 93 [2020-07-20 01:12:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:30,339 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-20 01:12:30,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-20 01:12:30,339 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-20 01:12:30,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 01:12:30,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:30,340 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:30,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-20 01:12:30,555 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:30,556 INFO L82 PathProgramCache]: Analyzing trace with hash -789379885, now seen corresponding path program 21 times [2020-07-20 01:12:30,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:30,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752349341] [2020-07-20 01:12:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:12:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-20 01:12:32,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752349341] [2020-07-20 01:12:32,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064396500] [2020-07-20 01:12:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f83a8db No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:32,707 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f83a8db issued 4 check-sat command(s) [2020-07-20 01:12:32,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:32,712 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-20 01:12:32,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 14 proven. 227 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-07-20 01:12:34,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:34,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 23] total 53 [2020-07-20 01:12:34,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166097601] [2020-07-20 01:12:34,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-20 01:12:34,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:34,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-20 01:12:34,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2618, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 01:12:34,398 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 53 states. [2020-07-20 01:12:36,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:36,859 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-07-20 01:12:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 01:12:36,861 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 100 [2020-07-20 01:12:36,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:36,862 INFO L225 Difference]: With dead ends: 56 [2020-07-20 01:12:36,863 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 01:12:36,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=278, Invalid=4552, Unknown=0, NotChecked=0, Total=4830 [2020-07-20 01:12:36,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 01:12:36,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-07-20 01:12:36,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 01:12:36,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-07-20 01:12:36,885 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 100 [2020-07-20 01:12:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:36,886 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-07-20 01:12:36,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-20 01:12:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-07-20 01:12:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 01:12:36,887 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:36,887 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:37,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:37,102 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:37,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:37,103 INFO L82 PathProgramCache]: Analyzing trace with hash -793317021, now seen corresponding path program 22 times [2020-07-20 01:12:37,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:37,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726998894] [2020-07-20 01:12:37,104 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:12:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-20 01:12:38,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726998894] [2020-07-20 01:12:38,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239578837] [2020-07-20 01:12:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d0f4e95 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:38,914 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d0f4e95 issued 4 check-sat command(s) [2020-07-20 01:12:38,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:38,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-20 01:12:38,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 12 proven. 226 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-07-20 01:12:40,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:40,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 21] total 51 [2020-07-20 01:12:40,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994803647] [2020-07-20 01:12:40,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-20 01:12:40,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:40,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-20 01:12:40,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2416, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 01:12:40,282 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 51 states. [2020-07-20 01:12:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:42,903 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2020-07-20 01:12:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 01:12:42,904 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2020-07-20 01:12:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:42,906 INFO L225 Difference]: With dead ends: 58 [2020-07-20 01:12:42,906 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 01:12:42,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=272, Invalid=4284, Unknown=0, NotChecked=0, Total=4556 [2020-07-20 01:12:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 01:12:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-07-20 01:12:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:12:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-20 01:12:42,912 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 100 [2020-07-20 01:12:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:42,913 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-20 01:12:42,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-20 01:12:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-20 01:12:42,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 01:12:42,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:42,914 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:43,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-20 01:12:43,127 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:43,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:43,128 INFO L82 PathProgramCache]: Analyzing trace with hash -787811522, now seen corresponding path program 23 times [2020-07-20 01:12:43,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:43,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134977375] [2020-07-20 01:12:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:12:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-20 01:12:44,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134977375] [2020-07-20 01:12:44,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541878227] [2020-07-20 01:12:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@761bf9b2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:45,049 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@761bf9b2 issued 4 check-sat command(s) [2020-07-20 01:12:45,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:45,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-20 01:12:45,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 14 proven. 265 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2020-07-20 01:12:46,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:46,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 23] total 55 [2020-07-20 01:12:46,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239668565] [2020-07-20 01:12:46,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-20 01:12:46,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:46,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-20 01:12:46,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2826, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 01:12:46,913 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 55 states. [2020-07-20 01:12:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:49,637 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-07-20 01:12:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 01:12:49,638 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 107 [2020-07-20 01:12:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:49,639 INFO L225 Difference]: With dead ends: 56 [2020-07-20 01:12:49,639 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 01:12:49,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=286, Invalid=4826, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 01:12:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 01:12:49,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-07-20 01:12:49,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 01:12:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-07-20 01:12:49,647 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 107 [2020-07-20 01:12:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:49,647 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-07-20 01:12:49,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-20 01:12:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-07-20 01:12:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 01:12:49,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:49,648 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:49,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:49,861 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:49,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1080603673, now seen corresponding path program 24 times [2020-07-20 01:12:49,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:49,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310625078] [2020-07-20 01:12:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:12:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-20 01:12:51,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310625078] [2020-07-20 01:12:51,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29033050] [2020-07-20 01:12:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@496a75c4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:51,178 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@496a75c4 issued 4 check-sat command(s) [2020-07-20 01:12:51,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:51,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 129 conjunts are in the unsatisfiable core [2020-07-20 01:12:51,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 47 proven. 161 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-07-20 01:12:53,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:53,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 56 [2020-07-20 01:12:53,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042383282] [2020-07-20 01:12:53,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-20 01:12:53,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:53,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-20 01:12:53,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2931, Unknown=0, NotChecked=0, Total=3080 [2020-07-20 01:12:53,267 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 56 states. [2020-07-20 01:12:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:56,380 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-07-20 01:12:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 01:12:56,381 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 86 [2020-07-20 01:12:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:56,383 INFO L225 Difference]: With dead ends: 59 [2020-07-20 01:12:56,383 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 01:12:56,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=346, Invalid=5506, Unknown=0, NotChecked=0, Total=5852 [2020-07-20 01:12:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 01:12:56,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-07-20 01:12:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 01:12:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-20 01:12:56,394 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 86 [2020-07-20 01:12:56,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:56,395 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-20 01:12:56,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-20 01:12:56,395 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-20 01:12:56,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 01:12:56,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:56,397 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:56,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-20 01:12:56,606 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:56,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:56,607 INFO L82 PathProgramCache]: Analyzing trace with hash 365189506, now seen corresponding path program 25 times [2020-07-20 01:12:56,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:56,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275574332] [2020-07-20 01:12:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:12:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-20 01:12:58,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275574332] [2020-07-20 01:12:58,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517415564] [2020-07-20 01:12:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ec30a08 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:58,185 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ec30a08 issued 4 check-sat command(s) [2020-07-20 01:12:58,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:58,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-20 01:12:58,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:13:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-07-20 01:13:00,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:13:00,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 25] total 53 [2020-07-20 01:13:00,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815144163] [2020-07-20 01:13:00,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-20 01:13:00,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:13:00,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-20 01:13:00,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2620, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 01:13:00,042 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 53 states. [2020-07-20 01:13:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:13:03,058 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-07-20 01:13:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 01:13:03,059 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 93 [2020-07-20 01:13:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:13:03,061 INFO L225 Difference]: With dead ends: 61 [2020-07-20 01:13:03,061 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 01:13:03,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=288, Invalid=4824, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 01:13:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 01:13:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-07-20 01:13:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 01:13:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-20 01:13:03,073 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 93 [2020-07-20 01:13:03,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:13:03,074 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-20 01:13:03,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-20 01:13:03,074 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-20 01:13:03,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 01:13:03,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:13:03,075 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:13:03,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-20 01:13:03,291 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:13:03,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:13:03,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1104773667, now seen corresponding path program 26 times [2020-07-20 01:13:03,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:13:03,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650715380] [2020-07-20 01:13:03,292 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:13:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-20 01:13:04,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650715380] [2020-07-20 01:13:04,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246398455] [2020-07-20 01:13:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2109c274 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:04,979 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2109c274 issued 4 check-sat command(s) [2020-07-20 01:13:04,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:13:04,983 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-20 01:13:04,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:13:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 16 proven. 228 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-07-20 01:13:06,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:13:06,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 25] total 55 [2020-07-20 01:13:06,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544678055] [2020-07-20 01:13:06,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-20 01:13:06,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:13:06,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-20 01:13:06,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2828, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 01:13:06,872 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 55 states. [2020-07-20 01:13:10,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:13:10,449 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-07-20 01:13:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 01:13:10,451 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 100 [2020-07-20 01:13:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:13:10,452 INFO L225 Difference]: With dead ends: 61 [2020-07-20 01:13:10,452 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 01:13:10,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=296, Invalid=5106, Unknown=0, NotChecked=0, Total=5402 [2020-07-20 01:13:10,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 01:13:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-07-20 01:13:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 01:13:10,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-20 01:13:10,459 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 100 [2020-07-20 01:13:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:13:10,459 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-20 01:13:10,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-20 01:13:10,460 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-20 01:13:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 01:13:10,461 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:13:10,461 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:13:10,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-20 01:13:10,676 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:13:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:13:10,676 INFO L82 PathProgramCache]: Analyzing trace with hash 560522232, now seen corresponding path program 27 times [2020-07-20 01:13:10,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:13:10,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352719069] [2020-07-20 01:13:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:13:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-20 01:13:13,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352719069] [2020-07-20 01:13:13,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280648217] [2020-07-20 01:13:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@751b4865 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:13,103 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@751b4865 issued 4 check-sat command(s) [2020-07-20 01:13:13,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:13:13,107 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-20 01:13:13,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:13:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 16 proven. 266 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2020-07-20 01:13:15,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:13:15,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 25] total 57 [2020-07-20 01:13:15,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931731363] [2020-07-20 01:13:15,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-20 01:13:15,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:13:15,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-20 01:13:15,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=3044, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 01:13:15,553 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 57 states. [2020-07-20 01:13:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:13:19,690 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-07-20 01:13:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 01:13:19,692 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 107 [2020-07-20 01:13:19,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:13:19,694 INFO L225 Difference]: With dead ends: 61 [2020-07-20 01:13:19,694 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 01:13:19,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=304, Invalid=5396, Unknown=0, NotChecked=0, Total=5700 [2020-07-20 01:13:19,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 01:13:19,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-07-20 01:13:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 01:13:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-20 01:13:19,702 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 107 [2020-07-20 01:13:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:13:19,702 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-20 01:13:19,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-20 01:13:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-20 01:13:19,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 01:13:19,704 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:13:19,704 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:13:19,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-20 01:13:19,918 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:13:19,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:13:19,919 INFO L82 PathProgramCache]: Analyzing trace with hash -330893523, now seen corresponding path program 28 times [2020-07-20 01:13:19,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:13:19,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448841117] [2020-07-20 01:13:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:13:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-20 01:13:22,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448841117] [2020-07-20 01:13:22,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038858964] [2020-07-20 01:13:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7009343c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:22,908 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7009343c issued 4 check-sat command(s) [2020-07-20 01:13:22,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:13:22,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-20 01:13:22,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:13:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 16 proven. 307 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2020-07-20 01:13:25,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:13:25,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 25] total 59 [2020-07-20 01:13:25,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298883765] [2020-07-20 01:13:25,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-07-20 01:13:25,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:13:25,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-07-20 01:13:25,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2020-07-20 01:13:25,875 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 59 states. [2020-07-20 01:13:30,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:13:30,646 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2020-07-20 01:13:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 01:13:30,647 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 114 [2020-07-20 01:13:30,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:13:30,649 INFO L225 Difference]: With dead ends: 59 [2020-07-20 01:13:30,649 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 01:13:30,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=312, Invalid=5694, Unknown=0, NotChecked=0, Total=6006 [2020-07-20 01:13:30,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 01:13:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-07-20 01:13:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 01:13:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2020-07-20 01:13:30,660 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 114 [2020-07-20 01:13:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:13:30,661 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-07-20 01:13:30,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-07-20 01:13:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2020-07-20 01:13:30,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 01:13:30,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:13:30,662 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:13:30,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:30,876 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:13:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:13:30,877 INFO L82 PathProgramCache]: Analyzing trace with hash 326515792, now seen corresponding path program 29 times [2020-07-20 01:13:30,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:13:30,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000875868] [2020-07-20 01:13:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:13:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:31,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 148 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-20 01:13:32,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000875868] [2020-07-20 01:13:32,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304350279] [2020-07-20 01:13:32,423 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4416a734 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:32,466 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4416a734 issued 4 check-sat command(s) [2020-07-20 01:13:32,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:13:32,469 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-20 01:13:32,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:13:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 4 proven. 138 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-07-20 01:13:34,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:13:34,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21] total 45 [2020-07-20 01:13:34,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485828959] [2020-07-20 01:13:34,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 01:13:34,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:13:34,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 01:13:34,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1864, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 01:13:34,027 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand 45 states. [2020-07-20 01:13:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:13:37,057 INFO L93 Difference]: Finished difference Result 61 states and 87 transitions. [2020-07-20 01:13:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 01:13:37,059 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 79 [2020-07-20 01:13:37,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:13:37,061 INFO L225 Difference]: With dead ends: 61 [2020-07-20 01:13:37,061 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 01:13:37,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=248, Invalid=3534, Unknown=0, NotChecked=0, Total=3782 [2020-07-20 01:13:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 01:13:37,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-07-20 01:13:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 01:13:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 73 transitions. [2020-07-20 01:13:37,068 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 73 transitions. Word has length 79 [2020-07-20 01:13:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:13:37,069 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 73 transitions. [2020-07-20 01:13:37,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 01:13:37,069 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 73 transitions. [2020-07-20 01:13:37,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 01:13:37,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:13:37,070 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:13:37,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:37,285 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:13:37,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:13:37,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1907807715, now seen corresponding path program 30 times [2020-07-20 01:13:37,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:13:37,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029958292] [2020-07-20 01:13:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:13:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-20 01:13:39,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029958292] [2020-07-20 01:13:39,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743037779] [2020-07-20 01:13:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1931ceb5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:39,839 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1931ceb5 issued 4 check-sat command(s) [2020-07-20 01:13:39,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:13:39,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-20 01:13:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:13:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 14 proven. 306 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-07-20 01:13:42,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:13:42,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 23] total 57 [2020-07-20 01:13:42,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528507261] [2020-07-20 01:13:42,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-20 01:13:42,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:13:42,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-20 01:13:42,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3042, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 01:13:42,185 INFO L87 Difference]: Start difference. First operand 51 states and 73 transitions. Second operand 57 states. [2020-07-20 01:13:45,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:13:45,740 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-07-20 01:13:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 01:13:45,742 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 114 [2020-07-20 01:13:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:13:45,744 INFO L225 Difference]: With dead ends: 59 [2020-07-20 01:13:45,744 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 01:13:45,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=294, Invalid=5108, Unknown=0, NotChecked=0, Total=5402 [2020-07-20 01:13:45,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 01:13:45,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-07-20 01:13:45,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 01:13:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-20 01:13:45,751 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 114 [2020-07-20 01:13:45,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:13:45,751 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-20 01:13:45,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-20 01:13:45,752 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-20 01:13:45,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 01:13:45,753 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:13:45,753 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:13:45,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:45,955 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:13:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:13:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1776686958, now seen corresponding path program 31 times [2020-07-20 01:13:45,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:13:45,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563824895] [2020-07-20 01:13:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:13:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-07-20 01:13:48,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563824895] [2020-07-20 01:13:48,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859248233] [2020-07-20 01:13:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@151b2c1d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:48,813 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@151b2c1d issued 4 check-sat command(s) [2020-07-20 01:13:48,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:13:48,819 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-20 01:13:48,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:13:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 16 proven. 351 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2020-07-20 01:13:51,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:13:51,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 25] total 61 [2020-07-20 01:13:51,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320048528] [2020-07-20 01:13:51,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-20 01:13:51,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:13:51,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-20 01:13:51,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3500, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 01:13:51,507 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 61 states. [2020-07-20 01:13:56,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:13:56,655 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2020-07-20 01:13:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 01:13:56,659 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 121 [2020-07-20 01:13:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:13:56,660 INFO L225 Difference]: With dead ends: 59 [2020-07-20 01:13:56,660 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 01:13:56,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=320, Invalid=6000, Unknown=0, NotChecked=0, Total=6320 [2020-07-20 01:13:56,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 01:13:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-07-20 01:13:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 01:13:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2020-07-20 01:13:56,669 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 121 [2020-07-20 01:13:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:13:56,670 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-07-20 01:13:56,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-20 01:13:56,670 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2020-07-20 01:13:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 01:13:56,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:13:56,671 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:13:56,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-07-20 01:13:56,885 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:13:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:13:56,886 INFO L82 PathProgramCache]: Analyzing trace with hash 183807880, now seen corresponding path program 32 times [2020-07-20 01:13:56,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:13:56,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019747258] [2020-07-20 01:13:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:13:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-20 01:13:58,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019747258] [2020-07-20 01:13:58,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795182217] [2020-07-20 01:13:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e5c6cf0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:58,748 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e5c6cf0 issued 4 check-sat command(s) [2020-07-20 01:13:58,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:13:58,751 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 141 conjunts are in the unsatisfiable core [2020-07-20 01:13:58,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:14:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 52 proven. 194 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-20 01:14:02,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:14:02,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 60 [2020-07-20 01:14:02,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116897034] [2020-07-20 01:14:02,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-20 01:14:02,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:14:02,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-20 01:14:02,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3381, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 01:14:02,089 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand 60 states. [2020-07-20 01:14:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:14:07,270 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-07-20 01:14:07,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 01:14:07,272 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 93 [2020-07-20 01:14:07,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:14:07,273 INFO L225 Difference]: With dead ends: 62 [2020-07-20 01:14:07,273 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 01:14:07,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=376, Invalid=6430, Unknown=0, NotChecked=0, Total=6806 [2020-07-20 01:14:07,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 01:14:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-07-20 01:14:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 01:14:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-20 01:14:07,280 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 93 [2020-07-20 01:14:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:14:07,280 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-20 01:14:07,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-20 01:14:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-20 01:14:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 01:14:07,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:14:07,282 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:14:07,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:14:07,495 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:14:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:14:07,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1182847487, now seen corresponding path program 33 times [2020-07-20 01:14:07,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:14:07,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180286666] [2020-07-20 01:14:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:14:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-20 01:14:09,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180286666] [2020-07-20 01:14:09,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699331473] [2020-07-20 01:14:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e4836ad No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:14:09,553 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e4836ad issued 4 check-sat command(s) [2020-07-20 01:14:09,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:14:09,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-20 01:14:09,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:14:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 18 proven. 229 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-07-20 01:14:12,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:14:12,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27] total 57 [2020-07-20 01:14:12,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857508260] [2020-07-20 01:14:12,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-20 01:14:12,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:14:12,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-20 01:14:12,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3046, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 01:14:12,440 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 57 states. [2020-07-20 01:14:17,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:14:17,367 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-20 01:14:17,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 01:14:17,368 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 100 [2020-07-20 01:14:17,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:14:17,369 INFO L225 Difference]: With dead ends: 64 [2020-07-20 01:14:17,370 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 01:14:17,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=314, Invalid=5692, Unknown=0, NotChecked=0, Total=6006 [2020-07-20 01:14:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 01:14:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-20 01:14:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 01:14:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-20 01:14:17,378 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 100 [2020-07-20 01:14:17,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:14:17,379 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-20 01:14:17,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-20 01:14:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-20 01:14:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 01:14:17,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:14:17,380 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:14:17,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-20 01:14:17,582 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:14:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:14:17,582 INFO L82 PathProgramCache]: Analyzing trace with hash -865344962, now seen corresponding path program 34 times [2020-07-20 01:14:17,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:14:17,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931627368] [2020-07-20 01:14:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:14:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-20 01:14:20,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931627368] [2020-07-20 01:14:20,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494607190] [2020-07-20 01:14:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37ad8abb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:14:20,298 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37ad8abb issued 4 check-sat command(s) [2020-07-20 01:14:20,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:14:20,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 168 conjunts are in the unsatisfiable core [2020-07-20 01:14:20,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:14:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 26 proven. 285 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-07-20 01:14:24,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:14:24,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 31] total 61 [2020-07-20 01:14:24,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647518798] [2020-07-20 01:14:24,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-20 01:14:24,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:14:24,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-20 01:14:24,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3497, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 01:14:24,803 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 61 states. [2020-07-20 01:14:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:14:30,802 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-20 01:14:30,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 01:14:30,803 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 107 [2020-07-20 01:14:30,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:14:30,805 INFO L225 Difference]: With dead ends: 64 [2020-07-20 01:14:30,805 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 01:14:30,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=353, Invalid=6289, Unknown=0, NotChecked=0, Total=6642 [2020-07-20 01:14:30,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 01:14:30,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-20 01:14:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 01:14:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-20 01:14:30,816 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 107 [2020-07-20 01:14:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:14:30,816 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-20 01:14:30,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-20 01:14:30,817 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-20 01:14:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 01:14:30,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:14:30,818 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:14:31,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:14:31,033 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:14:31,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:14:31,033 INFO L82 PathProgramCache]: Analyzing trace with hash -564676919, now seen corresponding path program 35 times [2020-07-20 01:14:31,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:14:31,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556463023] [2020-07-20 01:14:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:14:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-20 01:14:33,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556463023] [2020-07-20 01:14:33,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128345863] [2020-07-20 01:14:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7cb0e5f6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:14:33,975 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7cb0e5f6 issued 4 check-sat command(s) [2020-07-20 01:14:33,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:14:33,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-20 01:14:33,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:14:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 18 proven. 308 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2020-07-20 01:14:37,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:14:37,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 27] total 61 [2020-07-20 01:14:37,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005492853] [2020-07-20 01:14:37,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-20 01:14:37,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:14:37,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-20 01:14:37,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=3502, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 01:14:37,625 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 61 states. [2020-07-20 01:14:44,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:14:44,385 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-20 01:14:44,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 01:14:44,391 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 114 [2020-07-20 01:14:44,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:14:44,392 INFO L225 Difference]: With dead ends: 64 [2020-07-20 01:14:44,392 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 01:14:44,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=330, Invalid=6312, Unknown=0, NotChecked=0, Total=6642 [2020-07-20 01:14:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 01:14:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-20 01:14:44,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 01:14:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-20 01:14:44,399 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 114 [2020-07-20 01:14:44,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:14:44,399 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-20 01:14:44,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-20 01:14:44,399 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-20 01:14:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 01:14:44,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:14:44,400 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:14:44,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-20 01:14:44,615 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:14:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:14:44,616 INFO L82 PathProgramCache]: Analyzing trace with hash -173240844, now seen corresponding path program 36 times [2020-07-20 01:14:44,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:14:44,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124697250] [2020-07-20 01:14:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:14:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-07-20 01:14:48,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124697250] [2020-07-20 01:14:48,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108649470] [2020-07-20 01:14:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4c60801d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:14:49,039 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4c60801d issued 4 check-sat command(s) [2020-07-20 01:14:49,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:14:49,045 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-20 01:14:49,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:14:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 18 proven. 352 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-07-20 01:14:54,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:14:54,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 27] total 63 [2020-07-20 01:14:54,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464607265] [2020-07-20 01:14:54,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-07-20 01:14:54,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:14:54,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-07-20 01:14:54,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3742, Unknown=0, NotChecked=0, Total=3906 [2020-07-20 01:14:54,624 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 63 states. [2020-07-20 01:15:03,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:15:03,601 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-20 01:15:03,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 01:15:03,606 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 121 [2020-07-20 01:15:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:15:03,608 INFO L225 Difference]: With dead ends: 64 [2020-07-20 01:15:03,608 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 01:15:03,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=338, Invalid=6634, Unknown=0, NotChecked=0, Total=6972 [2020-07-20 01:15:03,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 01:15:03,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-20 01:15:03,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 01:15:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-20 01:15:03,616 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 121 [2020-07-20 01:15:03,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:15:03,616 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-20 01:15:03,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-07-20 01:15:03,616 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-20 01:15:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 01:15:03,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:15:03,618 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:15:03,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-20 01:15:03,839 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:15:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:15:03,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1022743187, now seen corresponding path program 37 times [2020-07-20 01:15:03,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:15:03,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947464991] [2020-07-20 01:15:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:15:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-07-20 01:15:09,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947464991] [2020-07-20 01:15:09,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454113624] [2020-07-20 01:15:09,087 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@420006f2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:15:09,155 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@420006f2 issued 4 check-sat command(s) [2020-07-20 01:15:09,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:15:09,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-20 01:15:09,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:15:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 18 proven. 399 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-20 01:15:15,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:15:15,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 27] total 65 [2020-07-20 01:15:15,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802341025] [2020-07-20 01:15:15,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-20 01:15:15,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:15:15,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-20 01:15:15,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3990, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 01:15:15,447 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 65 states. [2020-07-20 01:15:23,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:15:23,905 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-07-20 01:15:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 01:15:23,911 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2020-07-20 01:15:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:15:23,912 INFO L225 Difference]: With dead ends: 62 [2020-07-20 01:15:23,912 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 01:15:23,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=346, Invalid=6964, Unknown=0, NotChecked=0, Total=7310 [2020-07-20 01:15:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 01:15:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-07-20 01:15:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 01:15:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2020-07-20 01:15:23,920 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 128 [2020-07-20 01:15:23,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:15:23,920 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2020-07-20 01:15:23,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-20 01:15:23,921 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2020-07-20 01:15:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 01:15:23,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:15:23,922 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:15:24,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-20 01:15:24,136 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:15:24,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:15:24,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1134604024, now seen corresponding path program 38 times [2020-07-20 01:15:24,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:15:24,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688336444] [2020-07-20 01:15:24,138 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:15:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 215 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-20 01:15:27,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688336444] [2020-07-20 01:15:27,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821492878] [2020-07-20 01:15:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@649d0810 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:15:27,214 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@649d0810 issued 4 check-sat command(s) [2020-07-20 01:15:27,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:15:27,218 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-20 01:15:27,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:15:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 6 proven. 200 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-07-20 01:15:30,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:15:30,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 23] total 51 [2020-07-20 01:15:30,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627749524] [2020-07-20 01:15:30,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-20 01:15:30,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:15:30,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-20 01:15:30,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2418, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 01:15:30,668 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand 51 states. [2020-07-20 01:15:37,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:15:37,170 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2020-07-20 01:15:37,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 01:15:37,175 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 93 [2020-07-20 01:15:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:15:37,177 INFO L225 Difference]: With dead ends: 64 [2020-07-20 01:15:37,177 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 01:15:37,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=282, Invalid=4548, Unknown=0, NotChecked=0, Total=4830 [2020-07-20 01:15:37,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 01:15:37,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-07-20 01:15:37,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 01:15:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2020-07-20 01:15:37,185 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 93 [2020-07-20 01:15:37,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:15:37,185 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2020-07-20 01:15:37,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-20 01:15:37,185 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2020-07-20 01:15:37,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 01:15:37,186 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:15:37,187 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:15:37,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-20 01:15:37,401 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:15:37,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:15:37,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1339978551, now seen corresponding path program 39 times [2020-07-20 01:15:37,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:15:37,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733010418] [2020-07-20 01:15:37,402 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:15:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-07-20 01:15:42,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733010418] [2020-07-20 01:15:42,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817972282] [2020-07-20 01:15:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6ec7d69f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:15:42,847 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6ec7d69f issued 4 check-sat command(s) [2020-07-20 01:15:42,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:15:42,853 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-20 01:15:42,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:15:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 16 proven. 398 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-07-20 01:15:47,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:15:47,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 25] total 63 [2020-07-20 01:15:47,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283292343] [2020-07-20 01:15:47,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-07-20 01:15:47,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:15:47,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-07-20 01:15:47,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3740, Unknown=0, NotChecked=0, Total=3906 [2020-07-20 01:15:47,768 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand 63 states. [2020-07-20 01:15:56,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:15:56,542 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-07-20 01:15:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 01:15:56,547 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 128 [2020-07-20 01:15:56,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:15:56,549 INFO L225 Difference]: With dead ends: 62 [2020-07-20 01:15:56,549 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 01:15:56,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=328, Invalid=6314, Unknown=0, NotChecked=0, Total=6642 [2020-07-20 01:15:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 01:15:56,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-07-20 01:15:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 01:15:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-20 01:15:56,563 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 128 [2020-07-20 01:15:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:15:56,563 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-20 01:15:56,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-07-20 01:15:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-20 01:15:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 01:15:56,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:15:56,565 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:15:56,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:15:56,780 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:15:56,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:15:56,781 INFO L82 PathProgramCache]: Analyzing trace with hash -893562198, now seen corresponding path program 40 times [2020-07-20 01:15:56,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:15:56,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216814672] [2020-07-20 01:15:56,782 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:15:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-07-20 01:16:03,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216814672] [2020-07-20 01:16:03,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796487322] [2020-07-20 01:16:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ce27624 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:16:03,502 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ce27624 issued 4 check-sat command(s) [2020-07-20 01:16:03,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:16:03,508 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-20 01:16:03,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:16:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 18 proven. 449 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2020-07-20 01:16:10,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:16:10,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 27] total 67 [2020-07-20 01:16:10,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055779888] [2020-07-20 01:16:10,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-20 01:16:10,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:16:10,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-20 01:16:10,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4246, Unknown=0, NotChecked=0, Total=4422 [2020-07-20 01:16:10,029 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 67 states. [2020-07-20 01:16:18,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:16:18,644 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-07-20 01:16:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 01:16:18,648 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 135 [2020-07-20 01:16:18,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:16:18,649 INFO L225 Difference]: With dead ends: 62 [2020-07-20 01:16:18,649 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 01:16:18,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=354, Invalid=7302, Unknown=0, NotChecked=0, Total=7656 [2020-07-20 01:16:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 01:16:18,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-07-20 01:16:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 01:16:18,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2020-07-20 01:16:18,654 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 135 [2020-07-20 01:16:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:16:18,654 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2020-07-20 01:16:18,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-20 01:16:18,654 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2020-07-20 01:16:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 01:16:18,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:16:18,655 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:16:18,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-07-20 01:16:18,856 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:16:18,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:16:18,856 INFO L82 PathProgramCache]: Analyzing trace with hash -992427037, now seen corresponding path program 41 times [2020-07-20 01:16:18,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:16:18,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717825425] [2020-07-20 01:16:18,857 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:16:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-20 01:16:21,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717825425] [2020-07-20 01:16:21,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992445180] [2020-07-20 01:16:21,447 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7242dee9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:16:21,498 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7242dee9 issued 4 check-sat command(s) [2020-07-20 01:16:21,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:16:21,503 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 153 conjunts are in the unsatisfiable core [2020-07-20 01:16:21,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:16:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 57 proven. 230 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-07-20 01:16:26,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:16:26,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 64 [2020-07-20 01:16:26,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811402014] [2020-07-20 01:16:26,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-20 01:16:26,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:16:26,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-20 01:16:26,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3863, Unknown=0, NotChecked=0, Total=4032 [2020-07-20 01:16:26,293 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand 64 states. [2020-07-20 01:16:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:16:34,068 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2020-07-20 01:16:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 01:16:34,071 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 100 [2020-07-20 01:16:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:16:34,073 INFO L225 Difference]: With dead ends: 65 [2020-07-20 01:16:34,073 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 01:16:34,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=406, Invalid=7426, Unknown=0, NotChecked=0, Total=7832 [2020-07-20 01:16:34,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 01:16:34,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-07-20 01:16:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:16:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-20 01:16:34,080 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 100 [2020-07-20 01:16:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:16:34,080 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-20 01:16:34,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-20 01:16:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-20 01:16:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 01:16:34,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:16:34,082 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:16:34,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:16:34,290 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:16:34,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:16:34,291 INFO L82 PathProgramCache]: Analyzing trace with hash -445760116, now seen corresponding path program 42 times [2020-07-20 01:16:34,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:16:34,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312394138] [2020-07-20 01:16:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:16:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-20 01:16:37,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312394138] [2020-07-20 01:16:37,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484997592] [2020-07-20 01:16:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66ce215c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:16:37,605 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66ce215c issued 4 check-sat command(s) [2020-07-20 01:16:37,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:16:37,610 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-20 01:16:37,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:16:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-07-20 01:16:42,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:16:42,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 29] total 61 [2020-07-20 01:16:42,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51187048] [2020-07-20 01:16:42,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-20 01:16:42,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:16:42,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-20 01:16:42,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3504, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 01:16:42,167 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 61 states. [2020-07-20 01:16:50,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:16:50,637 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-20 01:16:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 01:16:50,640 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 107 [2020-07-20 01:16:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:16:50,641 INFO L225 Difference]: With dead ends: 67 [2020-07-20 01:16:50,642 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 01:16:50,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=340, Invalid=6632, Unknown=0, NotChecked=0, Total=6972 [2020-07-20 01:16:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 01:16:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-20 01:16:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:16:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-20 01:16:50,648 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 107 [2020-07-20 01:16:50,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:16:50,648 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-20 01:16:50,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-20 01:16:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-20 01:16:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 01:16:50,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:16:50,650 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:16:50,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:16:50,862 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:16:50,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:16:50,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1805961107, now seen corresponding path program 43 times [2020-07-20 01:16:50,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:16:50,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847291679] [2020-07-20 01:16:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:16:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-20 01:16:54,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847291679] [2020-07-20 01:16:54,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673761498] [2020-07-20 01:16:54,684 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b339b56 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:16:54,740 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b339b56 issued 4 check-sat command(s) [2020-07-20 01:16:54,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:16:54,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-20 01:16:54,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:16:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 20 proven. 309 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2020-07-20 01:16:58,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:16:58,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 29] total 63 [2020-07-20 01:16:58,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571420169] [2020-07-20 01:16:58,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-07-20 01:16:58,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:16:58,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-07-20 01:16:58,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=3744, Unknown=0, NotChecked=0, Total=3906 [2020-07-20 01:16:58,961 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 63 states. [2020-07-20 01:17:07,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:17:07,026 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-20 01:17:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 01:17:07,031 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 114 [2020-07-20 01:17:07,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:17:07,032 INFO L225 Difference]: With dead ends: 67 [2020-07-20 01:17:07,032 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 01:17:07,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=348, Invalid=6962, Unknown=0, NotChecked=0, Total=7310 [2020-07-20 01:17:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 01:17:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-20 01:17:07,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:17:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-20 01:17:07,038 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 114 [2020-07-20 01:17:07,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:17:07,038 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-20 01:17:07,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-07-20 01:17:07,038 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-20 01:17:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 01:17:07,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:17:07,039 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:17:07,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-07-20 01:17:07,252 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:17:07,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:17:07,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1954300290, now seen corresponding path program 44 times [2020-07-20 01:17:07,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:17:07,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087380132] [2020-07-20 01:17:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:17:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-07-20 01:17:11,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087380132] [2020-07-20 01:17:11,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508390978] [2020-07-20 01:17:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ef95e18 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:17:11,374 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ef95e18 issued 4 check-sat command(s) [2020-07-20 01:17:11,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:17:11,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-20 01:17:11,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:17:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 20 proven. 353 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2020-07-20 01:17:16,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:17:16,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 29] total 65 [2020-07-20 01:17:16,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559039344] [2020-07-20 01:17:16,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-20 01:17:16,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:17:16,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-20 01:17:16,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3992, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 01:17:16,541 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 65 states. [2020-07-20 01:17:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:17:25,607 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-20 01:17:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 01:17:25,614 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 121 [2020-07-20 01:17:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:17:25,616 INFO L225 Difference]: With dead ends: 67 [2020-07-20 01:17:25,616 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 01:17:25,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=356, Invalid=7300, Unknown=0, NotChecked=0, Total=7656 [2020-07-20 01:17:25,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 01:17:25,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-20 01:17:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:17:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-20 01:17:25,624 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 121 [2020-07-20 01:17:25,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:17:25,625 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-20 01:17:25,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-20 01:17:25,625 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-20 01:17:25,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 01:17:25,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:17:25,626 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:17:25,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-07-20 01:17:25,841 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:17:25,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:17:25,842 INFO L82 PathProgramCache]: Analyzing trace with hash -970320905, now seen corresponding path program 45 times [2020-07-20 01:17:25,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:17:25,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532081642] [2020-07-20 01:17:25,842 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:17:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-07-20 01:17:32,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532081642] [2020-07-20 01:17:32,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732653827] [2020-07-20 01:17:32,358 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f4a631 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:17:32,427 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f4a631 issued 4 check-sat command(s) [2020-07-20 01:17:32,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:17:32,433 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-20 01:17:32,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:17:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 20 proven. 400 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2020-07-20 01:17:40,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:17:40,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 29] total 67 [2020-07-20 01:17:40,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781691443] [2020-07-20 01:17:40,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-20 01:17:40,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:17:40,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-20 01:17:40,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=4248, Unknown=0, NotChecked=0, Total=4422 [2020-07-20 01:17:40,132 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 67 states. [2020-07-20 01:17:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:17:53,464 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-20 01:17:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 01:17:53,469 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 128 [2020-07-20 01:17:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:17:53,470 INFO L225 Difference]: With dead ends: 67 [2020-07-20 01:17:53,470 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 01:17:53,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=364, Invalid=7646, Unknown=0, NotChecked=0, Total=8010 [2020-07-20 01:17:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 01:17:53,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-20 01:17:53,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:17:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-20 01:17:53,477 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 128 [2020-07-20 01:17:53,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:17:53,477 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-20 01:17:53,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-20 01:17:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-20 01:17:53,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 01:17:53,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:17:53,479 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:17:53,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-07-20 01:17:53,693 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:17:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:17:53,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1081659784, now seen corresponding path program 46 times [2020-07-20 01:17:53,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:17:53,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605730632] [2020-07-20 01:17:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:17:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-07-20 01:17:58,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605730632] [2020-07-20 01:17:58,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537268240] [2020-07-20 01:17:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6cfeddef No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:17:58,930 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6cfeddef issued 4 check-sat command(s) [2020-07-20 01:17:58,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:17:58,934 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-20 01:17:58,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:18:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 20 proven. 450 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-07-20 01:18:07,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:18:07,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 29] total 69 [2020-07-20 01:18:07,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532842068] [2020-07-20 01:18:07,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-20 01:18:07,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:18:07,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-20 01:18:07,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=4512, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 01:18:07,818 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 69 states. [2020-07-20 01:18:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:18:26,340 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-20 01:18:26,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 01:18:26,340 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 135 [2020-07-20 01:18:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:18:26,341 INFO L225 Difference]: With dead ends: 67 [2020-07-20 01:18:26,342 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 01:18:26,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=372, Invalid=8000, Unknown=0, NotChecked=0, Total=8372 [2020-07-20 01:18:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 01:18:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-20 01:18:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:18:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-20 01:18:26,350 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 135 [2020-07-20 01:18:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:18:26,351 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-20 01:18:26,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-20 01:18:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-20 01:18:26,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 01:18:26,352 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:18:26,352 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:18:26,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:18:26,567 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:18:26,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:18:26,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1602926209, now seen corresponding path program 47 times [2020-07-20 01:18:26,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:18:26,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370703700] [2020-07-20 01:18:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:18:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2020-07-20 01:18:37,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370703700] [2020-07-20 01:18:37,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922423583] [2020-07-20 01:18:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e2f7a28 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:18:38,016 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e2f7a28 issued 4 check-sat command(s) [2020-07-20 01:18:38,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:18:38,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-07-20 01:18:38,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:18:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 20 proven. 503 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2020-07-20 01:18:50,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:18:50,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 29] total 71 [2020-07-20 01:18:50,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349420952] [2020-07-20 01:18:50,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-07-20 01:18:50,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:18:50,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-07-20 01:18:50,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=4784, Unknown=0, NotChecked=0, Total=4970 [2020-07-20 01:18:50,158 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 71 states. [2020-07-20 01:19:01,449 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 01:19:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:19:12,475 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-20 01:19:12,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 01:19:12,484 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 142 [2020-07-20 01:19:12,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:19:12,485 INFO L225 Difference]: With dead ends: 65 [2020-07-20 01:19:12,486 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 01:19:12,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=380, Invalid=8362, Unknown=0, NotChecked=0, Total=8742 [2020-07-20 01:19:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 01:19:12,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-07-20 01:19:12,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 01:19:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2020-07-20 01:19:12,491 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 142 [2020-07-20 01:19:12,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:19:12,492 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2020-07-20 01:19:12,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-07-20 01:19:12,492 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2020-07-20 01:19:12,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 01:19:12,493 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:19:12,493 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:19:12,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-07-20 01:19:12,706 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:19:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:19:12,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2017391546, now seen corresponding path program 48 times [2020-07-20 01:19:12,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:19:12,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327262517] [2020-07-20 01:19:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:19:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 215 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-20 01:19:17,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327262517] [2020-07-20 01:19:17,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421457938] [2020-07-20 01:19:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@176e9888 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:19:17,717 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@176e9888 issued 4 check-sat command(s) [2020-07-20 01:19:17,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:19:17,721 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-20 01:19:17,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:19:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 4 proven. 205 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-07-20 01:19:24,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:19:24,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 25] total 53 [2020-07-20 01:19:24,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332865086] [2020-07-20 01:19:24,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-20 01:19:24,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:19:24,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-20 01:19:24,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2620, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 01:19:24,165 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand 53 states. [2020-07-20 01:19:38,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:19:38,480 INFO L93 Difference]: Finished difference Result 67 states and 99 transitions. [2020-07-20 01:19:38,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 01:19:38,481 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 93 [2020-07-20 01:19:38,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:19:38,482 INFO L225 Difference]: With dead ends: 67 [2020-07-20 01:19:38,482 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 01:19:38,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=300, Invalid=5102, Unknown=0, NotChecked=0, Total=5402 [2020-07-20 01:19:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 01:19:38,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-07-20 01:19:38,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:19:38,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2020-07-20 01:19:38,490 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 93 [2020-07-20 01:19:38,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:19:38,490 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2020-07-20 01:19:38,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-20 01:19:38,490 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2020-07-20 01:19:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 01:19:38,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:19:38,492 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:19:38,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-07-20 01:19:38,708 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:19:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:19:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1270577827, now seen corresponding path program 49 times [2020-07-20 01:19:38,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:19:38,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627750259] [2020-07-20 01:19:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:19:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2020-07-20 01:19:48,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627750259] [2020-07-20 01:19:48,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691111381] [2020-07-20 01:19:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d7b32b6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:19:48,729 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d7b32b6 issued 4 check-sat command(s) [2020-07-20 01:19:48,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:19:48,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-07-20 01:19:48,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:19:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 18 proven. 502 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-07-20 01:19:59,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:19:59,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 27] total 69 [2020-07-20 01:19:59,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821512665] [2020-07-20 01:19:59,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-20 01:19:59,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:19:59,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-20 01:19:59,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=4510, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 01:19:59,003 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand 69 states. [2020-07-20 01:20:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:20:17,044 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2020-07-20 01:20:17,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 01:20:17,054 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 142 [2020-07-20 01:20:17,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:20:17,055 INFO L225 Difference]: With dead ends: 65 [2020-07-20 01:20:17,055 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 01:20:17,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=362, Invalid=7648, Unknown=0, NotChecked=0, Total=8010 [2020-07-20 01:20:17,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 01:20:17,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-07-20 01:20:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:20:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-20 01:20:17,062 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 142 [2020-07-20 01:20:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:20:17,063 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-20 01:20:17,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-20 01:20:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-20 01:20:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-20 01:20:17,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:20:17,065 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:20:17,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:20:17,267 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:20:17,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:20:17,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1655069586, now seen corresponding path program 50 times [2020-07-20 01:20:17,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:20:17,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404262786] [2020-07-20 01:20:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:20:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 68 proven. 601 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2020-07-20 01:20:29,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404262786] [2020-07-20 01:20:29,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678818885] [2020-07-20 01:20:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fd0951a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:20:29,437 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fd0951a issued 4 check-sat command(s) [2020-07-20 01:20:29,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:20:29,445 WARN L261 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 241 conjunts are in the unsatisfiable core [2020-07-20 01:20:29,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:20:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 20 proven. 559 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2020-07-20 01:20:38,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:20:38,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 29] total 73 [2020-07-20 01:20:38,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915980911] [2020-07-20 01:20:38,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-07-20 01:20:38,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:20:38,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-07-20 01:20:38,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5064, Unknown=0, NotChecked=0, Total=5256 [2020-07-20 01:20:38,572 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 73 states. [2020-07-20 01:20:51,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:20:51,461 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-20 01:20:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 01:20:51,467 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 149 [2020-07-20 01:20:51,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:20:51,468 INFO L225 Difference]: With dead ends: 65 [2020-07-20 01:20:51,469 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 01:20:51,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=388, Invalid=8732, Unknown=0, NotChecked=0, Total=9120 [2020-07-20 01:20:51,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 01:20:51,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-07-20 01:20:51,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 01:20:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2020-07-20 01:20:51,474 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 149 [2020-07-20 01:20:51,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:20:51,475 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2020-07-20 01:20:51,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-07-20 01:20:51,475 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2020-07-20 01:20:51,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 01:20:51,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:20:51,476 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:20:51,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-07-20 01:20:51,688 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:20:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:20:51,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1733939138, now seen corresponding path program 51 times [2020-07-20 01:20:51,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:20:51,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296829450] [2020-07-20 01:20:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:20:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-20 01:20:55,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296829450] [2020-07-20 01:20:55,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909177528] [2020-07-20 01:20:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40997098 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:20:55,944 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40997098 issued 4 check-sat command(s) [2020-07-20 01:20:55,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:20:55,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 165 conjunts are in the unsatisfiable core [2020-07-20 01:20:55,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:21:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 62 proven. 269 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-07-20 01:21:04,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:21:04,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 68 [2020-07-20 01:21:04,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967007053] [2020-07-20 01:21:04,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-20 01:21:04,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:21:04,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-20 01:21:04,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=4377, Unknown=0, NotChecked=0, Total=4556 [2020-07-20 01:21:04,485 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand 68 states. [2020-07-20 01:21:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:21:19,098 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2020-07-20 01:21:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 01:21:19,098 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 107 [2020-07-20 01:21:19,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:21:19,099 INFO L225 Difference]: With dead ends: 68 [2020-07-20 01:21:19,099 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 01:21:19,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=436, Invalid=8494, Unknown=0, NotChecked=0, Total=8930 [2020-07-20 01:21:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 01:21:19,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-07-20 01:21:19,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 01:21:19,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-20 01:21:19,105 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 107 [2020-07-20 01:21:19,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:21:19,106 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-20 01:21:19,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-20 01:21:19,106 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-20 01:21:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 01:21:19,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:21:19,107 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:21:19,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:21:19,320 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:21:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:21:19,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1739770251, now seen corresponding path program 52 times [2020-07-20 01:21:19,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:21:19,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907654612] [2020-07-20 01:21:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:21:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-20 01:21:24,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907654612] [2020-07-20 01:21:24,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443337597] [2020-07-20 01:21:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@9dea385 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:21:24,810 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@9dea385 issued 4 check-sat command(s) [2020-07-20 01:21:24,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:21:24,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-20 01:21:24,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:21:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 22 proven. 310 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2020-07-20 01:21:32,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:21:32,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31] total 65 [2020-07-20 01:21:32,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086617698] [2020-07-20 01:21:32,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-20 01:21:32,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:21:32,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-20 01:21:32,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3994, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 01:21:32,836 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 65 states. [2020-07-20 01:21:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:21:46,910 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 01:21:46,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 01:21:46,917 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 114 [2020-07-20 01:21:46,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:21:46,918 INFO L225 Difference]: With dead ends: 70 [2020-07-20 01:21:46,919 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 01:21:46,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=366, Invalid=7644, Unknown=0, NotChecked=0, Total=8010 [2020-07-20 01:21:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 01:21:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-20 01:21:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 01:21:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-20 01:21:46,925 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 114 [2020-07-20 01:21:46,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:21:46,926 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-20 01:21:46,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-20 01:21:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-20 01:21:46,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 01:21:46,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:21:46,927 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:21:47,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-07-20 01:21:47,140 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:21:47,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:21:47,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1164219276, now seen corresponding path program 53 times [2020-07-20 01:21:47,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:21:47,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258814112] [2020-07-20 01:21:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:21:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-07-20 01:21:53,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258814112] [2020-07-20 01:21:53,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886103542] [2020-07-20 01:21:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@305d8a7b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:21:53,793 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@305d8a7b issued 4 check-sat command(s) [2020-07-20 01:21:53,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:21:53,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 192 conjunts are in the unsatisfiable core [2020-07-20 01:21:53,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:22:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 30 proven. 376 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-07-20 01:22:04,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:22:04,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 35] total 69 [2020-07-20 01:22:04,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506311741] [2020-07-20 01:22:04,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-20 01:22:04,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:22:04,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-20 01:22:04,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=4509, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 01:22:04,813 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 69 states. [2020-07-20 01:22:19,122 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-07-20 01:22:19,778 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-07-20 01:22:20,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:22:20,761 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 01:22:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 01:22:20,767 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 121 [2020-07-20 01:22:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:22:20,769 INFO L225 Difference]: With dead ends: 70 [2020-07-20 01:22:20,769 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 01:22:20,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=409, Invalid=8333, Unknown=0, NotChecked=0, Total=8742 [2020-07-20 01:22:20,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 01:22:20,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-20 01:22:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 01:22:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-20 01:22:20,783 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 121 [2020-07-20 01:22:20,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:22:20,783 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-20 01:22:20,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-20 01:22:20,784 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-20 01:22:20,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 01:22:20,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:22:20,785 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:22:20,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-07-20 01:22:20,986 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:22:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:22:20,986 INFO L82 PathProgramCache]: Analyzing trace with hash 325513663, now seen corresponding path program 54 times [2020-07-20 01:22:20,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:22:20,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669477668] [2020-07-20 01:22:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:22:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-07-20 01:22:28,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669477668] [2020-07-20 01:22:28,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782277820] [2020-07-20 01:22:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de58e4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:22:28,290 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de58e4 issued 4 check-sat command(s) [2020-07-20 01:22:28,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:22:28,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-20 01:22:28,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:22:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 22 proven. 401 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2020-07-20 01:22:38,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:22:38,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 31] total 69 [2020-07-20 01:22:38,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909784576] [2020-07-20 01:22:38,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-20 01:22:38,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:22:38,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-20 01:22:38,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=4514, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 01:22:38,125 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 69 states. [2020-07-20 01:22:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:22:52,595 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 01:22:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 01:22:52,601 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 128 [2020-07-20 01:22:52,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:22:52,603 INFO L225 Difference]: With dead ends: 70 [2020-07-20 01:22:52,603 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 01:22:52,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=382, Invalid=8360, Unknown=0, NotChecked=0, Total=8742 [2020-07-20 01:22:52,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 01:22:52,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-20 01:22:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 01:22:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-20 01:22:52,610 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 128 [2020-07-20 01:22:52,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:22:52,610 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-20 01:22:52,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-20 01:22:52,610 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-20 01:22:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 01:22:52,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:22:52,611 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:22:52,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:22:52,827 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:22:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:22:52,827 INFO L82 PathProgramCache]: Analyzing trace with hash 634544554, now seen corresponding path program 55 times [2020-07-20 01:22:52,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:22:52,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145619826] [2020-07-20 01:22:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:22:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-07-20 01:23:00,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145619826] [2020-07-20 01:23:00,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246622071] [2020-07-20 01:23:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@417da5ec No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:23:00,099 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@417da5ec issued 4 check-sat command(s) [2020-07-20 01:23:00,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:23:00,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-20 01:23:00,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:23:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 22 proven. 451 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-07-20 01:23:09,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:23:09,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 31] total 71 [2020-07-20 01:23:09,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937946927] [2020-07-20 01:23:09,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-07-20 01:23:09,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:23:09,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-07-20 01:23:09,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=4786, Unknown=0, NotChecked=0, Total=4970 [2020-07-20 01:23:09,224 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 71 states. [2020-07-20 01:23:20,068 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 01:23:24,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:23:24,535 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 01:23:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 01:23:24,541 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 135 [2020-07-20 01:23:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:23:24,543 INFO L225 Difference]: With dead ends: 70 [2020-07-20 01:23:24,543 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 01:23:24,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=390, Invalid=8730, Unknown=0, NotChecked=0, Total=9120 [2020-07-20 01:23:24,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 01:23:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-20 01:23:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 01:23:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-20 01:23:24,549 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 135 [2020-07-20 01:23:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:23:24,550 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-20 01:23:24,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-07-20 01:23:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-20 01:23:24,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 01:23:24,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:23:24,551 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:23:24,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-07-20 01:23:24,765 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:23:24,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:23:24,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1864653815, now seen corresponding path program 56 times [2020-07-20 01:23:24,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:23:24,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633233317] [2020-07-20 01:23:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:23:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2020-07-20 01:23:32,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633233317] [2020-07-20 01:23:32,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477183719] [2020-07-20 01:23:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@427161aa No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:23:32,748 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@427161aa issued 4 check-sat command(s) [2020-07-20 01:23:32,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:23:32,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-07-20 01:23:32,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:23:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 22 proven. 504 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2020-07-20 01:23:42,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:23:42,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 31] total 73 [2020-07-20 01:23:42,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510463979] [2020-07-20 01:23:42,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-07-20 01:23:42,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:23:42,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-07-20 01:23:42,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5066, Unknown=0, NotChecked=0, Total=5256 [2020-07-20 01:23:42,318 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 73 states. [2020-07-20 01:23:57,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:23:57,935 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 01:23:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 01:23:57,942 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 142 [2020-07-20 01:23:57,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:23:57,943 INFO L225 Difference]: With dead ends: 70 [2020-07-20 01:23:57,943 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 01:23:57,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=398, Invalid=9108, Unknown=0, NotChecked=0, Total=9506 [2020-07-20 01:23:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 01:23:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-20 01:23:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 01:23:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-20 01:23:57,949 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 142 [2020-07-20 01:23:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:23:57,949 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-20 01:23:57,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-07-20 01:23:57,949 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-20 01:23:57,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-20 01:23:57,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:23:57,950 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:23:58,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:23:58,151 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:23:58,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:23:58,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1103515680, now seen corresponding path program 57 times [2020-07-20 01:23:58,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:23:58,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32326379] [2020-07-20 01:23:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:23:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 68 proven. 601 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2020-07-20 01:24:07,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32326379] [2020-07-20 01:24:07,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413102801] [2020-07-20 01:24:07,077 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@799606d3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:24:07,149 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@799606d3 issued 4 check-sat command(s) [2020-07-20 01:24:07,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:24:07,155 WARN L261 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 241 conjunts are in the unsatisfiable core [2020-07-20 01:24:07,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:24:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 22 proven. 560 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2020-07-20 01:24:17,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:24:17,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 31] total 75 [2020-07-20 01:24:17,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173504] [2020-07-20 01:24:17,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-20 01:24:17,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:24:17,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-20 01:24:17,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=5354, Unknown=0, NotChecked=0, Total=5550 [2020-07-20 01:24:17,342 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 75 states. [2020-07-20 01:24:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:24:32,683 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 01:24:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 01:24:32,690 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 149 [2020-07-20 01:24:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:24:32,691 INFO L225 Difference]: With dead ends: 70 [2020-07-20 01:24:32,692 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 01:24:32,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=406, Invalid=9494, Unknown=0, NotChecked=0, Total=9900 [2020-07-20 01:24:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 01:24:32,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-20 01:24:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 01:24:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-20 01:24:32,698 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 149 [2020-07-20 01:24:32,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:24:32,699 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-20 01:24:32,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-20 01:24:32,699 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-20 01:24:32,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-07-20 01:24:32,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:24:32,700 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:24:32,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-07-20 01:24:32,913 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:24:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:24:32,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1632850605, now seen corresponding path program 58 times [2020-07-20 01:24:32,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:24:32,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187268166] [2020-07-20 01:24:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f070865 [2020-07-20 01:24:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 72 proven. 663 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2020-07-20 01:24:42,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187268166] [2020-07-20 01:24:42,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576101304] [2020-07-20 01:24:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@218a1c86 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:24:42,746 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@218a1c86 issued 4 check-sat command(s) [2020-07-20 01:24:42,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:24:42,751 WARN L261 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 253 conjunts are in the unsatisfiable core [2020-07-20 01:24:42,754 INFO L286 TraceCheckSpWp]: Computing forward predicates...