/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 BIGGEST_EQUIVALENCE_CLASS --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 05:29:22,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:29:22,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:29:22,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 05:29:22,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 05:29:22,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 05:29:22,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 05:29:22,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 05:29:22,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 05:29:22,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 05:29:22,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 05:29:22,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 05:29:22,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:29:22,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:29:22,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:29:22,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:29:22,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:29:22,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:29:22,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:29:22,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:29:22,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:29:22,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:29:22,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:29:22,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:29:22,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 05:29:22,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:29:22,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:29:22,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:29:22,723 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 05:29:22,759 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:29:22,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:29:22,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:29:22,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:29:22,764 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:29:22,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:29:22,765 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:29:22,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:29:22,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:29:22,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:29:22,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:29:22,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:29:22,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:29:22,769 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:29:22,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:29:22,770 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:29:22,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:29:22,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:29:22,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:29:22,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:29:22,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:29:22,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:29:22,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:29:22,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:29:22,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:29:22,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:29:22,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:29:22,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:29:22,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:29:22,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS 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 05:29:23,080 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:29:23,094 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:29:23,098 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:29:23,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:29:23,100 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:29:23,101 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-20 05:29:23,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30a57f3ea/9cfe1f2974da47438e3a7dfd28e06a1a/FLAG04647f425 [2020-07-20 05:29:23,600 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:29:23,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-20 05:29:23,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30a57f3ea/9cfe1f2974da47438e3a7dfd28e06a1a/FLAG04647f425 [2020-07-20 05:29:23,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30a57f3ea/9cfe1f2974da47438e3a7dfd28e06a1a [2020-07-20 05:29:23,992 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:29:23,996 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:29:24,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:29:24,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:29:24,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:29:24,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:29:23" (1/1) ... [2020-07-20 05:29:24,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec48294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:24, skipping insertion in model container [2020-07-20 05:29:24,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:29:23" (1/1) ... [2020-07-20 05:29:24,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:29:24,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:29:24,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:29:24,216 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:29:24,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:29:24,249 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:29:24,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:24 WrapperNode [2020-07-20 05:29:24,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:29:24,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:29:24,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:29:24,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:29:24,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:24" (1/1) ... [2020-07-20 05:29:24,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:24" (1/1) ... [2020-07-20 05:29:24,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:24" (1/1) ... [2020-07-20 05:29:24,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:24" (1/1) ... [2020-07-20 05:29:24,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:24" (1/1) ... [2020-07-20 05:29:24,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:24" (1/1) ... [2020-07-20 05:29:24,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:24" (1/1) ... [2020-07-20 05:29:24,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:29:24,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:29:24,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:29:24,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:29:24,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:24" (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 05:29:24,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:29:24,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:29:24,426 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-07-20 05:29:24,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:29:24,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:29:24,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 05:29:24,427 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-07-20 05:29:24,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:29:24,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:29:24,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:29:24,623 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:29:24,623 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 05:29:24,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:29:24 BoogieIcfgContainer [2020-07-20 05:29:24,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:29:24,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:29:24,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:29:24,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:29:24,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:29:23" (1/3) ... [2020-07-20 05:29:24,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed98e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:29:24, skipping insertion in model container [2020-07-20 05:29:24,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:24" (2/3) ... [2020-07-20 05:29:24,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed98e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:29:24, skipping insertion in model container [2020-07-20 05:29:24,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:29:24" (3/3) ... [2020-07-20 05:29:24,635 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-07-20 05:29:24,645 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:29:24,652 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:29:24,666 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:29:24,688 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:29:24,689 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:29:24,689 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:29:24,689 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:29:24,689 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:29:24,689 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:29:24,690 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:29:24,690 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:29:24,707 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 05:29:24,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 05:29:24,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:24,716 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 05:29:24,717 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:24,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:24,723 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-07-20 05:29:24,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:24,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764098008] [2020-07-20 05:29:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 05:29:24,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764098008] [2020-07-20 05:29:24,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062049175] [2020-07-20 05:29:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d237c21 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 05:29:25,040 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d237c21 issued 2 check-sat command(s) [2020-07-20 05:29:25,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:25,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 05:29:25,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:25,116 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 05:29:25,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:25,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-20 05:29:25,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307439299] [2020-07-20 05:29:25,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 05:29:25,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:25,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 05:29:25,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:29:25,155 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-07-20 05:29:25,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:25,318 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-07-20 05:29:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 05:29:25,321 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-20 05:29:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:25,333 INFO L225 Difference]: With dead ends: 41 [2020-07-20 05:29:25,333 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 05:29:25,337 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 05:29:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 05:29:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 05:29:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 05:29:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-20 05:29:25,387 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-07-20 05:29:25,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:25,387 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-20 05:29:25,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 05:29:25,388 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-20 05:29:25,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 05:29:25,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:25,391 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 05:29:25,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-20 05:29:25,599 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:25,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-07-20 05:29:25,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:25,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227725146] [2020-07-20 05:29:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,787 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 05:29:25,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227725146] [2020-07-20 05:29:25,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:29:25,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 05:29:25,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362974831] [2020-07-20 05:29:25,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 05:29:25,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:25,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 05:29:25,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 05:29:25,795 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-07-20 05:29:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:25,875 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-20 05:29:25,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 05:29:25,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-07-20 05:29:25,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:25,878 INFO L225 Difference]: With dead ends: 29 [2020-07-20 05:29:25,878 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 05:29:25,879 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 05:29:25,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 05:29:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 05:29:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 05:29:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-07-20 05:29:25,888 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-07-20 05:29:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:25,889 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-07-20 05:29:25,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 05:29:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-07-20 05:29:25,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 05:29:25,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:25,891 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 05:29:25,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 05:29:25,892 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:25,892 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-07-20 05:29:25,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:25,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776922655] [2020-07-20 05:29:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 05:29:26,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776922655] [2020-07-20 05:29:26,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812574050] [2020-07-20 05:29:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2106d27c 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 05:29:26,265 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2106d27c issued 4 check-sat command(s) [2020-07-20 05:29:26,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:26,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 05:29:26,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:26,544 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 05:29:26,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:26,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-07-20 05:29:26,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210633945] [2020-07-20 05:29:26,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 05:29:26,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:26,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 05:29:26,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-07-20 05:29:26,548 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 21 states. [2020-07-20 05:29:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:27,172 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-07-20 05:29:27,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 05:29:27,172 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-07-20 05:29:27,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:27,174 INFO L225 Difference]: With dead ends: 43 [2020-07-20 05:29:27,174 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 05:29:27,175 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 05:29:27,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 05:29:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-07-20 05:29:27,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 05:29:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-07-20 05:29:27,196 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-07-20 05:29:27,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:27,196 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-07-20 05:29:27,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 05:29:27,196 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-07-20 05:29:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 05:29:27,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:27,200 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 05:29:27,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:27,416 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:27,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:27,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-07-20 05:29:27,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:27,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49834144] [2020-07-20 05:29:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:27,578 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 05:29:27,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49834144] [2020-07-20 05:29:27,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424499422] [2020-07-20 05:29:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e28e506 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:27,625 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e28e506 issued 4 check-sat command(s) [2020-07-20 05:29:27,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:27,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 05:29:27,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:27,668 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 05:29:27,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:27,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 05:29:27,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264467630] [2020-07-20 05:29:27,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 05:29:27,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:27,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 05:29:27,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:29:27,670 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 9 states. [2020-07-20 05:29:27,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:27,763 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-07-20 05:29:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 05:29:27,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-07-20 05:29:27,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:27,764 INFO L225 Difference]: With dead ends: 54 [2020-07-20 05:29:27,765 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 05:29:27,766 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 05:29:27,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 05:29:27,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 05:29:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 05:29:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-07-20 05:29:27,772 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2020-07-20 05:29:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:27,773 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-07-20 05:29:27,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 05:29:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-07-20 05:29:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 05:29:27,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:27,777 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 05:29:27,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:27,978 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:27,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-07-20 05:29:27,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:27,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738226136] [2020-07-20 05:29:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 05:29:28,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738226136] [2020-07-20 05:29:28,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102904896] [2020-07-20 05:29:28,413 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@cd8cc13 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 05:29:28,459 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@cd8cc13 issued 4 check-sat command(s) [2020-07-20 05:29:28,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:28,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 05:29:28,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:28,958 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 05:29:28,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:28,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-07-20 05:29:28,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178299932] [2020-07-20 05:29:28,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 05:29:28,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:28,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 05:29:28,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-07-20 05:29:28,961 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 32 states. [2020-07-20 05:29:29,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:29,602 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-07-20 05:29:29,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 05:29:29,602 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 44 [2020-07-20 05:29:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:29,604 INFO L225 Difference]: With dead ends: 39 [2020-07-20 05:29:29,604 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 05:29:29,607 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 05:29:29,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 05:29:29,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-07-20 05:29:29,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 05:29:29,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-07-20 05:29:29,621 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 44 [2020-07-20 05:29:29,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:29,622 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-07-20 05:29:29,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 05:29:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-07-20 05:29:29,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 05:29:29,623 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:29,624 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 05:29:29,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:29,837 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:29,838 INFO L82 PathProgramCache]: Analyzing trace with hash 430867302, now seen corresponding path program 4 times [2020-07-20 05:29:29,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:29,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514219405] [2020-07-20 05:29:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:30,383 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 05:29:30,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514219405] [2020-07-20 05:29:30,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771204822] [2020-07-20 05:29:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a66bb7e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:30,437 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a66bb7e issued 4 check-sat command(s) [2020-07-20 05:29:30,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:30,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 69 conjunts are in the unsatisfiable core [2020-07-20 05:29:30,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:31,091 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 05:29:31,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:31,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2020-07-20 05:29:31,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570159265] [2020-07-20 05:29:31,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 05:29:31,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:31,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 05:29:31,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 05:29:31,097 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 36 states. [2020-07-20 05:29:31,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:31,957 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-20 05:29:31,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 05:29:31,958 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 51 [2020-07-20 05:29:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:31,960 INFO L225 Difference]: With dead ends: 42 [2020-07-20 05:29:31,960 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 05:29:31,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=196, Invalid=1966, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 05:29:31,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 05:29:31,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-07-20 05:29:31,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 05:29:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-07-20 05:29:31,971 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 51 [2020-07-20 05:29:31,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:31,971 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-07-20 05:29:31,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 05:29:31,971 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-07-20 05:29:31,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 05:29:31,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:31,973 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 05:29:32,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 05:29:32,189 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:32,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:32,190 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 5 times [2020-07-20 05:29:32,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:32,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147008256] [2020-07-20 05:29:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-07-20 05:29:32,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147008256] [2020-07-20 05:29:32,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010797428] [2020-07-20 05:29:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@10b475dd 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 05:29:32,786 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@10b475dd issued 4 check-sat command(s) [2020-07-20 05:29:32,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:32,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 81 conjunts are in the unsatisfiable core [2020-07-20 05:29:32,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:33,513 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 05:29:33,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:33,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2020-07-20 05:29:33,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432058317] [2020-07-20 05:29:33,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 05:29:33,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:33,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 05:29:33,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1451, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 05:29:33,516 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 40 states. [2020-07-20 05:29:34,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:34,753 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-07-20 05:29:34,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 05:29:34,753 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 58 [2020-07-20 05:29:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:34,755 INFO L225 Difference]: With dead ends: 45 [2020-07-20 05:29:34,755 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 05:29:34,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=226, Invalid=2530, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 05:29:34,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 05:29:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-07-20 05:29:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 05:29:34,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-07-20 05:29:34,765 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 58 [2020-07-20 05:29:34,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:34,766 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-07-20 05:29:34,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 05:29:34,766 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-07-20 05:29:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 05:29:34,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:34,767 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 05:29:34,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:34,976 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:34,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:34,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1872336740, now seen corresponding path program 6 times [2020-07-20 05:29:34,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:34,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685471420] [2020-07-20 05:29:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:35,298 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 05:29:35,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685471420] [2020-07-20 05:29:35,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577925024] [2020-07-20 05:29:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7c1d15d4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:35,349 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7c1d15d4 issued 4 check-sat command(s) [2020-07-20 05:29:35,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:35,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 73 conjunts are in the unsatisfiable core [2020-07-20 05:29:35,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:35,638 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 05:29:35,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:35,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2020-07-20 05:29:35,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953948196] [2020-07-20 05:29:35,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 05:29:35,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:35,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 05:29:35,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-07-20 05:29:35,641 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 24 states. [2020-07-20 05:29:36,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:36,181 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-07-20 05:29:36,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 05:29:36,181 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-07-20 05:29:36,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:36,183 INFO L225 Difference]: With dead ends: 49 [2020-07-20 05:29:36,183 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 05:29:36,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 05:29:36,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 05:29:36,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-07-20 05:29:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 05:29:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-07-20 05:29:36,193 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 51 [2020-07-20 05:29:36,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:36,194 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-07-20 05:29:36,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 05:29:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-07-20 05:29:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 05:29:36,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:36,196 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 05:29:36,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:36,409 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:36,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:36,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1605933725, now seen corresponding path program 7 times [2020-07-20 05:29:36,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:36,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211745968] [2020-07-20 05:29:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-07-20 05:29:36,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211745968] [2020-07-20 05:29:36,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089544838] [2020-07-20 05:29:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@458a9569 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 05:29:36,958 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@458a9569 issued 4 check-sat command(s) [2020-07-20 05:29:36,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:36,960 WARN L261 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 85 conjunts are in the unsatisfiable core [2020-07-20 05:29:36,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-20 05:29:37,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:37,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 33 [2020-07-20 05:29:37,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769711103] [2020-07-20 05:29:37,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 05:29:37,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:37,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 05:29:37,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 05:29:37,403 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 33 states. [2020-07-20 05:29:38,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:38,124 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-07-20 05:29:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 05:29:38,125 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 58 [2020-07-20 05:29:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:38,127 INFO L225 Difference]: With dead ends: 47 [2020-07-20 05:29:38,127 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 05:29:38,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 05:29:38,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 05:29:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-07-20 05:29:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 05:29:38,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2020-07-20 05:29:38,137 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 58 [2020-07-20 05:29:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:38,137 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2020-07-20 05:29:38,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 05:29:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2020-07-20 05:29:38,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 05:29:38,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:38,139 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 05:29:38,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 05:29:38,353 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:38,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:38,354 INFO L82 PathProgramCache]: Analyzing trace with hash 921134702, now seen corresponding path program 8 times [2020-07-20 05:29:38,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:38,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755550650] [2020-07-20 05:29:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:39,048 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 05:29:39,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755550650] [2020-07-20 05:29:39,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161502657] [2020-07-20 05:29:39,049 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71e3da06 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:39,095 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71e3da06 issued 4 check-sat command(s) [2020-07-20 05:29:39,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:39,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-20 05:29:39,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:39,677 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 05:29:39,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:39,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17] total 37 [2020-07-20 05:29:39,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848575296] [2020-07-20 05:29:39,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 05:29:39,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:39,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 05:29:39,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 05:29:39,680 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 37 states. [2020-07-20 05:29:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:40,583 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-07-20 05:29:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 05:29:40,583 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 65 [2020-07-20 05:29:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:40,585 INFO L225 Difference]: With dead ends: 47 [2020-07-20 05:29:40,585 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 05:29:40,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=184, Invalid=2072, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 05:29:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 05:29:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-07-20 05:29:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 05:29:40,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-07-20 05:29:40,594 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 65 [2020-07-20 05:29:40,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:40,594 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-07-20 05:29:40,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 05:29:40,595 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-07-20 05:29:40,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 05:29:40,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:40,596 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 05:29:40,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:40,807 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:40,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 9 times [2020-07-20 05:29:40,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:40,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010970450] [2020-07-20 05:29:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-20 05:29:41,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010970450] [2020-07-20 05:29:41,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102213114] [2020-07-20 05:29:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5c792709 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 05:29:41,519 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5c792709 issued 4 check-sat command(s) [2020-07-20 05:29:41,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:41,522 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 93 conjunts are in the unsatisfiable core [2020-07-20 05:29:41,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:42,490 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 05:29:42,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:42,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2020-07-20 05:29:42,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030170817] [2020-07-20 05:29:42,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-20 05:29:42,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:42,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-20 05:29:42,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1773, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 05:29:42,493 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 44 states. [2020-07-20 05:29:43,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:43,899 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-07-20 05:29:43,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 05:29:43,900 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 65 [2020-07-20 05:29:43,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:43,902 INFO L225 Difference]: With dead ends: 50 [2020-07-20 05:29:43,902 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 05:29:43,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=256, Invalid=3166, Unknown=0, NotChecked=0, Total=3422 [2020-07-20 05:29:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 05:29:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-07-20 05:29:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 05:29:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-07-20 05:29:43,912 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 65 [2020-07-20 05:29:43,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:43,913 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-07-20 05:29:43,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-20 05:29:43,913 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-07-20 05:29:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-20 05:29:43,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:43,914 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 05:29:44,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:44,129 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:44,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:44,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 10 times [2020-07-20 05:29:44,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:44,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956382550] [2020-07-20 05:29:44,131 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:44,879 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 05:29:44,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956382550] [2020-07-20 05:29:44,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99516070] [2020-07-20 05:29:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a0a9377 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:44,922 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a0a9377 issued 4 check-sat command(s) [2020-07-20 05:29:44,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:44,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 109 conjunts are in the unsatisfiable core [2020-07-20 05:29:44,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:45,641 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 05:29:45,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:45,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 41 [2020-07-20 05:29:45,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123518498] [2020-07-20 05:29:45,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-20 05:29:45,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:45,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-20 05:29:45,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1534, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 05:29:45,643 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 41 states. [2020-07-20 05:29:46,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:46,855 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-07-20 05:29:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 05:29:46,856 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 72 [2020-07-20 05:29:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:46,857 INFO L225 Difference]: With dead ends: 50 [2020-07-20 05:29:46,857 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 05:29:46,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=210, Invalid=2652, Unknown=0, NotChecked=0, Total=2862 [2020-07-20 05:29:46,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 05:29:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-20 05:29:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 05:29:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-07-20 05:29:46,867 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 72 [2020-07-20 05:29:46,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:46,867 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-07-20 05:29:46,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-20 05:29:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-07-20 05:29:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 05:29:46,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:46,869 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 05:29:47,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 05:29:47,084 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:47,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:47,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2039564078, now seen corresponding path program 11 times [2020-07-20 05:29:47,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:47,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611754659] [2020-07-20 05:29:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-20 05:29:47,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611754659] [2020-07-20 05:29:47,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382628772] [2020-07-20 05:29:47,996 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c5a1aab 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 05:29:48,051 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c5a1aab issued 4 check-sat command(s) [2020-07-20 05:29:48,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:48,055 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-20 05:29:48,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:48,858 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 05:29:48,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:48,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19] total 43 [2020-07-20 05:29:48,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895938557] [2020-07-20 05:29:48,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-20 05:29:48,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:48,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-20 05:29:48,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1694, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 05:29:48,861 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 43 states. [2020-07-20 05:29:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:50,536 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-07-20 05:29:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 05:29:50,536 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 79 [2020-07-20 05:29:50,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:50,538 INFO L225 Difference]: With dead ends: 52 [2020-07-20 05:29:50,538 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 05:29:50,541 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 05:29:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 05:29:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-20 05:29:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 05:29:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-07-20 05:29:50,562 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 79 [2020-07-20 05:29:50,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:50,568 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-07-20 05:29:50,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-20 05:29:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-07-20 05:29:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-20 05:29:50,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:50,569 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 05:29:50,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 05:29:50,770 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:50,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:50,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 12 times [2020-07-20 05:29:50,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:50,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175456942] [2020-07-20 05:29:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:51,562 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 05:29:51,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175456942] [2020-07-20 05:29:51,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589466959] [2020-07-20 05:29:51,563 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2cb536b4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:51,616 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2cb536b4 issued 4 check-sat command(s) [2020-07-20 05:29:51,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:51,619 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 105 conjunts are in the unsatisfiable core [2020-07-20 05:29:51,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:52,802 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 05:29:52,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:52,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2020-07-20 05:29:52,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881826987] [2020-07-20 05:29:52,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-20 05:29:52,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:52,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-20 05:29:52,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2127, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 05:29:52,806 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 48 states. [2020-07-20 05:29:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:54,615 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-07-20 05:29:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 05:29:54,615 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 72 [2020-07-20 05:29:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:54,617 INFO L225 Difference]: With dead ends: 53 [2020-07-20 05:29:54,617 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 05:29:54,622 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 05:29:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 05:29:54,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-07-20 05:29:54,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 05:29:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-07-20 05:29:54,636 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 72 [2020-07-20 05:29:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:54,637 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-07-20 05:29:54,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-20 05:29:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-07-20 05:29:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 05:29:54,638 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:54,638 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 05:29:54,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 05:29:54,840 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:54,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:54,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1806425208, now seen corresponding path program 13 times [2020-07-20 05:29:54,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:54,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382021042] [2020-07-20 05:29:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-20 05:29:55,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382021042] [2020-07-20 05:29:55,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26316459] [2020-07-20 05:29:55,705 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65ddb163 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 05:29:55,749 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65ddb163 issued 4 check-sat command(s) [2020-07-20 05:29:55,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:55,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-20 05:29:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:56,670 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 05:29:56,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:56,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21] total 45 [2020-07-20 05:29:56,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206469479] [2020-07-20 05:29:56,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 05:29:56,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:56,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 05:29:56,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1864, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 05:29:56,673 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 45 states. [2020-07-20 05:29:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:58,368 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-07-20 05:29:58,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 05:29:58,369 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 79 [2020-07-20 05:29:58,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:58,370 INFO L225 Difference]: With dead ends: 55 [2020-07-20 05:29:58,371 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 05:29:58,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=236, Invalid=3304, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 05:29:58,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 05:29:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-07-20 05:29:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 05:29:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-07-20 05:29:58,380 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 79 [2020-07-20 05:29:58,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:58,380 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-07-20 05:29:58,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 05:29:58,381 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-07-20 05:29:58,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 05:29:58,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:58,382 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 05:29:58,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:58,595 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:58,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:58,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1615348441, now seen corresponding path program 14 times [2020-07-20 05:29:58,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:58,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006341445] [2020-07-20 05:29:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:29:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:59,696 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 05:29:59,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006341445] [2020-07-20 05:29:59,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566489681] [2020-07-20 05:29:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f256bc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:59,744 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f256bc issued 4 check-sat command(s) [2020-07-20 05:29:59,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:59,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-20 05:29:59,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:30:00,788 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 05:30:00,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:30:00,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21] total 47 [2020-07-20 05:30:00,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65505046] [2020-07-20 05:30:00,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-20 05:30:00,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:30:00,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-20 05:30:00,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2040, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 05:30:00,791 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 47 states. [2020-07-20 05:30:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:30:02,621 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-07-20 05:30:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 05:30:02,622 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 86 [2020-07-20 05:30:02,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:30:02,623 INFO L225 Difference]: With dead ends: 53 [2020-07-20 05:30:02,623 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 05:30:02,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=244, Invalid=3538, Unknown=0, NotChecked=0, Total=3782 [2020-07-20 05:30:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 05:30:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-20 05:30:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 05:30:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-07-20 05:30:02,632 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 86 [2020-07-20 05:30:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:30:02,633 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-07-20 05:30:02,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-20 05:30:02,633 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-07-20 05:30:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 05:30:02,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:30:02,634 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 05:30:02,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 05:30:02,849 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:30:02,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:30:02,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1394734426, now seen corresponding path program 15 times [2020-07-20 05:30:02,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:30:02,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730624880] [2020-07-20 05:30:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:30:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-20 05:30:03,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730624880] [2020-07-20 05:30:03,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239086961] [2020-07-20 05:30:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@179ae4cc 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 05:30:03,841 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@179ae4cc issued 4 check-sat command(s) [2020-07-20 05:30:03,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:30:03,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-20 05:30:03,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:30:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 83 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-20 05:30:04,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:30:04,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17] total 37 [2020-07-20 05:30:04,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512889927] [2020-07-20 05:30:04,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 05:30:04,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:30:04,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 05:30:04,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 05:30:04,477 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 37 states. [2020-07-20 05:30:05,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:30:05,789 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-07-20 05:30:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 05:30:05,789 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 65 [2020-07-20 05:30:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:30:05,792 INFO L225 Difference]: With dead ends: 55 [2020-07-20 05:30:05,793 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 05:30:05,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=196, Invalid=2254, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 05:30:05,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 05:30:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-07-20 05:30:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 05:30:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2020-07-20 05:30:05,814 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 65 [2020-07-20 05:30:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:30:05,815 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2020-07-20 05:30:05,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 05:30:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2020-07-20 05:30:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 05:30:05,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:30:05,816 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 05:30:06,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 05:30:06,017 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:30:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:30:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash -335786642, now seen corresponding path program 16 times [2020-07-20 05:30:06,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:30:06,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095728802] [2020-07-20 05:30:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:30:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:07,194 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 05:30:07,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095728802] [2020-07-20 05:30:07,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292253954] [2020-07-20 05:30:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5beb63fe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:30:07,251 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5beb63fe issued 4 check-sat command(s) [2020-07-20 05:30:07,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:30:07,254 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-20 05:30:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:30:08,372 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 05:30:08,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:30:08,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 21] total 49 [2020-07-20 05:30:08,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486625608] [2020-07-20 05:30:08,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-20 05:30:08,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:30:08,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-20 05:30:08,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2224, Unknown=0, NotChecked=0, Total=2352 [2020-07-20 05:30:08,375 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand 49 states. [2020-07-20 05:30:10,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:30:10,367 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2020-07-20 05:30:10,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 05:30:10,368 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 93 [2020-07-20 05:30:10,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:30:10,370 INFO L225 Difference]: With dead ends: 55 [2020-07-20 05:30:10,370 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 05:30:10,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=264, Invalid=4026, Unknown=0, NotChecked=0, Total=4290 [2020-07-20 05:30:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 05:30:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-20 05:30:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 05:30:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-07-20 05:30:10,378 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 93 [2020-07-20 05:30:10,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:30:10,378 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-07-20 05:30:10,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-20 05:30:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-07-20 05:30:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 05:30:10,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:30:10,380 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 05:30:10,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 05:30:10,592 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:30:10,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:30:10,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 17 times [2020-07-20 05:30:10,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:30:10,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284543802] [2020-07-20 05:30:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:30:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-20 05:30:11,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284543802] [2020-07-20 05:30:11,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907487001] [2020-07-20 05:30:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@357d58e9 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 05:30:11,551 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@357d58e9 issued 4 check-sat command(s) [2020-07-20 05:30:11,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:30:11,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 117 conjunts are in the unsatisfiable core [2020-07-20 05:30:11,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:30:13,021 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 05:30:13,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:30:13,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 52 [2020-07-20 05:30:13,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014977778] [2020-07-20 05:30:13,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-20 05:30:13,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:30:13,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-20 05:30:13,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2513, Unknown=0, NotChecked=0, Total=2652 [2020-07-20 05:30:13,024 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 52 states. [2020-07-20 05:30:15,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:30:15,428 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-07-20 05:30:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 05:30:15,429 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 79 [2020-07-20 05:30:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:30:15,431 INFO L225 Difference]: With dead ends: 56 [2020-07-20 05:30:15,431 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 05:30:15,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=316, Invalid=4654, Unknown=0, NotChecked=0, Total=4970 [2020-07-20 05:30:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 05:30:15,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-07-20 05:30:15,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 05:30:15,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-20 05:30:15,439 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 79 [2020-07-20 05:30:15,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:30:15,440 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-20 05:30:15,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-20 05:30:15,440 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-20 05:30:15,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 05:30:15,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:30:15,441 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 05:30:15,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:30:15,652 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:30:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:30:15,653 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 18 times [2020-07-20 05:30:15,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:30:15,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444510690] [2020-07-20 05:30:15,654 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:30:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:16,799 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 05:30:16,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444510690] [2020-07-20 05:30:16,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682245454] [2020-07-20 05:30:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@aaae881 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:30:16,858 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@aaae881 issued 4 check-sat command(s) [2020-07-20 05:30:16,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:30:16,864 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-20 05:30:16,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:30:18,060 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 05:30:18,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:30:18,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 23] total 49 [2020-07-20 05:30:18,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223423792] [2020-07-20 05:30:18,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-20 05:30:18,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:30:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-20 05:30:18,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2226, Unknown=0, NotChecked=0, Total=2352 [2020-07-20 05:30:18,063 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 49 states. [2020-07-20 05:30:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:30:20,151 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-07-20 05:30:20,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 05:30:20,152 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 86 [2020-07-20 05:30:20,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:30:20,154 INFO L225 Difference]: With dead ends: 58 [2020-07-20 05:30:20,154 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 05:30:20,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=262, Invalid=4028, Unknown=0, NotChecked=0, Total=4290 [2020-07-20 05:30:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 05:30:20,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-07-20 05:30:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 05:30:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-20 05:30:20,162 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 86 [2020-07-20 05:30:20,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:30:20,162 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-20 05:30:20,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-20 05:30:20,162 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-20 05:30:20,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 05:30:20,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:30:20,164 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 05:30:20,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:30:20,368 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:30:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:30:20,369 INFO L82 PathProgramCache]: Analyzing trace with hash -313052920, now seen corresponding path program 19 times [2020-07-20 05:30:20,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:30:20,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895654477] [2020-07-20 05:30:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:30:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-20 05:30:21,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895654477] [2020-07-20 05:30:21,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491924292] [2020-07-20 05:30:21,602 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13a44ff1 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 05:30:21,653 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13a44ff1 issued 4 check-sat command(s) [2020-07-20 05:30:21,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:30:21,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 144 conjunts are in the unsatisfiable core [2020-07-20 05:30:21,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:30:23,408 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 05:30:23,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:30:23,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27] total 53 [2020-07-20 05:30:23,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166499055] [2020-07-20 05:30:23,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-20 05:30:23,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:30:23,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-20 05:30:23,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2613, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 05:30:23,410 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 53 states. [2020-07-20 05:30:25,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:30:25,870 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-07-20 05:30:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 05:30:25,870 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 93 [2020-07-20 05:30:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:30:25,871 INFO L225 Difference]: With dead ends: 58 [2020-07-20 05:30:25,872 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 05:30:25,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=297, Invalid=4533, Unknown=0, NotChecked=0, Total=4830 [2020-07-20 05:30:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 05:30:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-07-20 05:30:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 05:30:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-20 05:30:25,879 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 93 [2020-07-20 05:30:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:30:25,879 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-20 05:30:25,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-20 05:30:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-20 05:30:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 05:30:25,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:30:25,881 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 05:30:26,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-20 05:30:26,088 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:30:26,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:30:26,089 INFO L82 PathProgramCache]: Analyzing trace with hash -789379885, now seen corresponding path program 20 times [2020-07-20 05:30:26,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:30:26,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490598874] [2020-07-20 05:30:26,090 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:30:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:27,769 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 05:30:27,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490598874] [2020-07-20 05:30:27,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876696216] [2020-07-20 05:30:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a1bdd64 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:30:27,825 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a1bdd64 issued 4 check-sat command(s) [2020-07-20 05:30:27,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:30:27,829 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-20 05:30:27,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:30:29,283 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 05:30:29,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:30:29,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 23] total 53 [2020-07-20 05:30:29,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404798529] [2020-07-20 05:30:29,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-20 05:30:29,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:30:29,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-20 05:30:29,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2618, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 05:30:29,285 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 53 states. [2020-07-20 05:30:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:30:31,441 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-07-20 05:30:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 05:30:31,445 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 100 [2020-07-20 05:30:31,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:30:31,446 INFO L225 Difference]: With dead ends: 56 [2020-07-20 05:30:31,446 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 05:30:31,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=278, Invalid=4552, Unknown=0, NotChecked=0, Total=4830 [2020-07-20 05:30:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 05:30:31,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-07-20 05:30:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 05:30:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-07-20 05:30:31,453 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 100 [2020-07-20 05:30:31,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:30:31,453 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-07-20 05:30:31,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-20 05:30:31,453 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-07-20 05:30:31,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 05:30:31,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:30:31,454 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 05:30:31,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-20 05:30:31,663 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:30:31,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:30:31,664 INFO L82 PathProgramCache]: Analyzing trace with hash -793317021, now seen corresponding path program 21 times [2020-07-20 05:30:31,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:30:31,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277508830] [2020-07-20 05:30:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:30:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-20 05:30:33,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277508830] [2020-07-20 05:30:33,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288497541] [2020-07-20 05:30:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28fb1255 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 05:30:33,132 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28fb1255 issued 4 check-sat command(s) [2020-07-20 05:30:33,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:30:33,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-20 05:30:33,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:30:34,342 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 05:30:34,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:30:34,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 21] total 51 [2020-07-20 05:30:34,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789995906] [2020-07-20 05:30:34,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-20 05:30:34,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:30:34,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-20 05:30:34,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2416, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 05:30:34,344 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 51 states. [2020-07-20 05:30:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:30:36,888 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2020-07-20 05:30:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 05:30:36,889 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2020-07-20 05:30:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:30:36,891 INFO L225 Difference]: With dead ends: 58 [2020-07-20 05:30:36,891 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 05:30:36,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=272, Invalid=4284, Unknown=0, NotChecked=0, Total=4556 [2020-07-20 05:30:36,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 05:30:36,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-07-20 05:30:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 05:30:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-20 05:30:36,898 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 100 [2020-07-20 05:30:36,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:30:36,898 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-20 05:30:36,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-20 05:30:36,898 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-20 05:30:36,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 05:30:36,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:30:36,899 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 05:30:37,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:30:37,113 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:30:37,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:30:37,114 INFO L82 PathProgramCache]: Analyzing trace with hash -787811522, now seen corresponding path program 22 times [2020-07-20 05:30:37,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:30:37,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605801079] [2020-07-20 05:30:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:30:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:39,065 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 05:30:39,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605801079] [2020-07-20 05:30:39,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872055379] [2020-07-20 05:30:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2cf78a0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:30:39,124 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2cf78a0 issued 4 check-sat command(s) [2020-07-20 05:30:39,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:30:39,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-20 05:30:39,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:30:40,748 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 05:30:40,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:30:40,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 23] total 55 [2020-07-20 05:30:40,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978028118] [2020-07-20 05:30:40,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-20 05:30:40,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:30:40,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-20 05:30:40,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2826, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 05:30:40,750 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 55 states. [2020-07-20 05:30:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:30:43,150 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-07-20 05:30:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 05:30:43,151 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 107 [2020-07-20 05:30:43,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:30:43,153 INFO L225 Difference]: With dead ends: 56 [2020-07-20 05:30:43,153 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 05:30:43,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=286, Invalid=4826, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 05:30:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 05:30:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-07-20 05:30:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 05:30:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-07-20 05:30:43,159 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 107 [2020-07-20 05:30:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:30:43,159 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-07-20 05:30:43,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-20 05:30:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-07-20 05:30:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 05:30:43,160 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:30:43,160 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 05:30:43,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-20 05:30:43,367 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:30:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:30:43,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1080603673, now seen corresponding path program 23 times [2020-07-20 05:30:43,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:30:43,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133989955] [2020-07-20 05:30:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:30:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-20 05:30:44,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133989955] [2020-07-20 05:30:44,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055207547] [2020-07-20 05:30:44,640 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f1453f6 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 05:30:44,687 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f1453f6 issued 4 check-sat command(s) [2020-07-20 05:30:44,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:30:44,691 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 129 conjunts are in the unsatisfiable core [2020-07-20 05:30:44,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:30:46,664 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 05:30:46,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:30:46,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 56 [2020-07-20 05:30:46,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926189581] [2020-07-20 05:30:46,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-20 05:30:46,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:30:46,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-20 05:30:46,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2931, Unknown=0, NotChecked=0, Total=3080 [2020-07-20 05:30:46,667 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 56 states. [2020-07-20 05:30:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:30:49,543 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-07-20 05:30:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 05:30:49,545 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 86 [2020-07-20 05:30:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:30:49,546 INFO L225 Difference]: With dead ends: 59 [2020-07-20 05:30:49,547 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 05:30:49,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=346, Invalid=5506, Unknown=0, NotChecked=0, Total=5852 [2020-07-20 05:30:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 05:30:49,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-07-20 05:30:49,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 05:30:49,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-20 05:30:49,554 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 86 [2020-07-20 05:30:49,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:30:49,555 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-20 05:30:49,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-20 05:30:49,555 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-20 05:30:49,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 05:30:49,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:30:49,556 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 05:30:49,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:30:49,760 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:30:49,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:30:49,762 INFO L82 PathProgramCache]: Analyzing trace with hash 365189506, now seen corresponding path program 24 times [2020-07-20 05:30:49,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:30:49,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500714756] [2020-07-20 05:30:49,763 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:30:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:51,018 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 05:30:51,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500714756] [2020-07-20 05:30:51,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343746071] [2020-07-20 05:30:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3423c4a8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:30:51,070 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3423c4a8 issued 4 check-sat command(s) [2020-07-20 05:30:51,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:30:51,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-20 05:30:51,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:30:52,683 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 05:30:52,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:30:52,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 25] total 53 [2020-07-20 05:30:52,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909377381] [2020-07-20 05:30:52,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-20 05:30:52,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:30:52,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-20 05:30:52,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2620, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 05:30:52,685 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 53 states. [2020-07-20 05:30:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:30:55,388 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-07-20 05:30:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 05:30:55,390 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 93 [2020-07-20 05:30:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:30:55,391 INFO L225 Difference]: With dead ends: 61 [2020-07-20 05:30:55,391 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 05:30:55,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=288, Invalid=4824, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 05:30:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 05:30:55,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-07-20 05:30:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 05:30:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-20 05:30:55,398 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 93 [2020-07-20 05:30:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:30:55,398 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-20 05:30:55,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-20 05:30:55,398 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-20 05:30:55,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 05:30:55,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:30:55,400 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 05:30:55,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-20 05:30:55,608 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:30:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:30:55,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1104773667, now seen corresponding path program 25 times [2020-07-20 05:30:55,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:30:55,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576360195] [2020-07-20 05:30:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:30:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:30:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-20 05:30:57,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576360195] [2020-07-20 05:30:57,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487518167] [2020-07-20 05:30:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@643a7b3c 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 05:30:57,202 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@643a7b3c issued 4 check-sat command(s) [2020-07-20 05:30:57,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:30:57,206 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-20 05:30:57,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:30:58,977 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 05:30:58,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:30:58,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 25] total 55 [2020-07-20 05:30:58,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477574303] [2020-07-20 05:30:58,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-20 05:30:58,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:30:58,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-20 05:30:58,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2828, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 05:30:58,980 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 55 states. [2020-07-20 05:31:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:31:02,003 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-07-20 05:31:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 05:31:02,004 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 100 [2020-07-20 05:31:02,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:31:02,006 INFO L225 Difference]: With dead ends: 61 [2020-07-20 05:31:02,006 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 05:31:02,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=296, Invalid=5106, Unknown=0, NotChecked=0, Total=5402 [2020-07-20 05:31:02,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 05:31:02,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-07-20 05:31:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 05:31:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-20 05:31:02,015 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 100 [2020-07-20 05:31:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:31:02,016 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-20 05:31:02,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-20 05:31:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-20 05:31:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 05:31:02,017 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:31:02,017 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 05:31:02,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-20 05:31:02,231 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:31:02,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:31:02,231 INFO L82 PathProgramCache]: Analyzing trace with hash 560522232, now seen corresponding path program 26 times [2020-07-20 05:31:02,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:31:02,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830216715] [2020-07-20 05:31:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:31:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:03,945 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 05:31:03,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830216715] [2020-07-20 05:31:03,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124791458] [2020-07-20 05:31:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5afd435d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:31:03,998 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5afd435d issued 4 check-sat command(s) [2020-07-20 05:31:03,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:31:04,002 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-20 05:31:04,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:31:05,993 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 05:31:05,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:31:05,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 25] total 57 [2020-07-20 05:31:05,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747766673] [2020-07-20 05:31:05,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-20 05:31:05,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:31:05,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-20 05:31:05,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=3044, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 05:31:05,995 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 57 states. [2020-07-20 05:31:08,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:31:08,972 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-07-20 05:31:08,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 05:31:08,974 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 107 [2020-07-20 05:31:08,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:31:08,975 INFO L225 Difference]: With dead ends: 61 [2020-07-20 05:31:08,975 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 05:31:08,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=304, Invalid=5396, Unknown=0, NotChecked=0, Total=5700 [2020-07-20 05:31:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 05:31:08,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-07-20 05:31:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 05:31:08,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-20 05:31:08,982 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 107 [2020-07-20 05:31:08,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:31:08,982 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-20 05:31:08,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-20 05:31:08,982 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-20 05:31:08,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 05:31:08,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:31:08,983 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 05:31:09,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-20 05:31:09,184 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:31:09,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:31:09,185 INFO L82 PathProgramCache]: Analyzing trace with hash -330893523, now seen corresponding path program 27 times [2020-07-20 05:31:09,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:31:09,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18885830] [2020-07-20 05:31:09,186 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:31:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:11,095 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 05:31:11,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18885830] [2020-07-20 05:31:11,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682939432] [2020-07-20 05:31:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4addb857 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 05:31:11,149 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4addb857 issued 4 check-sat command(s) [2020-07-20 05:31:11,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:31:11,153 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-20 05:31:11,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:31:13,153 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 05:31:13,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:31:13,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 25] total 59 [2020-07-20 05:31:13,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836848370] [2020-07-20 05:31:13,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-07-20 05:31:13,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:31:13,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-07-20 05:31:13,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2020-07-20 05:31:13,156 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 59 states. [2020-07-20 05:31:16,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:31:16,449 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2020-07-20 05:31:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 05:31:16,450 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 114 [2020-07-20 05:31:16,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:31:16,452 INFO L225 Difference]: With dead ends: 59 [2020-07-20 05:31:16,452 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 05:31:16,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=312, Invalid=5694, Unknown=0, NotChecked=0, Total=6006 [2020-07-20 05:31:16,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 05:31:16,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-07-20 05:31:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 05:31:16,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2020-07-20 05:31:16,459 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 114 [2020-07-20 05:31:16,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:31:16,459 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-07-20 05:31:16,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-07-20 05:31:16,459 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2020-07-20 05:31:16,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 05:31:16,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:31:16,460 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 05:31:16,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-20 05:31:16,673 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:31:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:31:16,673 INFO L82 PathProgramCache]: Analyzing trace with hash 326515792, now seen corresponding path program 28 times [2020-07-20 05:31:16,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:31:16,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455216812] [2020-07-20 05:31:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:31:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:17,745 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 05:31:17,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455216812] [2020-07-20 05:31:17,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256340203] [2020-07-20 05:31:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4c6663d9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:31:17,788 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4c6663d9 issued 4 check-sat command(s) [2020-07-20 05:31:17,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:31:17,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-20 05:31:17,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:31:19,059 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 05:31:19,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:31:19,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21] total 45 [2020-07-20 05:31:19,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704767867] [2020-07-20 05:31:19,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 05:31:19,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:31:19,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 05:31:19,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1864, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 05:31:19,061 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand 45 states. [2020-07-20 05:31:21,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:31:21,402 INFO L93 Difference]: Finished difference Result 61 states and 87 transitions. [2020-07-20 05:31:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 05:31:21,404 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 79 [2020-07-20 05:31:21,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:31:21,405 INFO L225 Difference]: With dead ends: 61 [2020-07-20 05:31:21,405 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 05:31:21,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=248, Invalid=3534, Unknown=0, NotChecked=0, Total=3782 [2020-07-20 05:31:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 05:31:21,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-07-20 05:31:21,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 05:31:21,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 73 transitions. [2020-07-20 05:31:21,412 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 73 transitions. Word has length 79 [2020-07-20 05:31:21,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:31:21,413 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 73 transitions. [2020-07-20 05:31:21,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 05:31:21,413 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 73 transitions. [2020-07-20 05:31:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 05:31:21,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:31:21,414 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 05:31:21,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:31:21,629 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:31:21,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:31:21,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1907807715, now seen corresponding path program 29 times [2020-07-20 05:31:21,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:31:21,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485499558] [2020-07-20 05:31:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:31:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:23,821 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 05:31:23,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485499558] [2020-07-20 05:31:23,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647203096] [2020-07-20 05:31:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35b1c7d6 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 05:31:23,877 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35b1c7d6 issued 4 check-sat command(s) [2020-07-20 05:31:23,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:31:23,882 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-20 05:31:23,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:31:25,826 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 05:31:25,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:31:25,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 23] total 57 [2020-07-20 05:31:25,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817906702] [2020-07-20 05:31:25,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-20 05:31:25,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:31:25,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-20 05:31:25,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3042, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 05:31:25,828 INFO L87 Difference]: Start difference. First operand 51 states and 73 transitions. Second operand 57 states. [2020-07-20 05:31:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:31:28,726 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-07-20 05:31:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 05:31:28,728 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 114 [2020-07-20 05:31:28,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:31:28,729 INFO L225 Difference]: With dead ends: 59 [2020-07-20 05:31:28,729 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 05:31:28,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=294, Invalid=5108, Unknown=0, NotChecked=0, Total=5402 [2020-07-20 05:31:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 05:31:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-07-20 05:31:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 05:31:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-20 05:31:28,735 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 114 [2020-07-20 05:31:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:31:28,735 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-20 05:31:28,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-20 05:31:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-20 05:31:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 05:31:28,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:31:28,737 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 05:31:28,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:31:28,949 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:31:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:31:28,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1776686958, now seen corresponding path program 30 times [2020-07-20 05:31:28,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:31:28,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304727420] [2020-07-20 05:31:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:31:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:31,267 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 05:31:31,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304727420] [2020-07-20 05:31:31,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228016189] [2020-07-20 05:31:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74b52e1b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:31:31,325 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74b52e1b issued 4 check-sat command(s) [2020-07-20 05:31:31,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:31:31,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-20 05:31:31,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:31:33,829 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 05:31:33,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:31:33,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 25] total 61 [2020-07-20 05:31:33,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247283691] [2020-07-20 05:31:33,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-20 05:31:33,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:31:33,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-20 05:31:33,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3500, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 05:31:33,832 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 61 states. [2020-07-20 05:31:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:31:37,668 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2020-07-20 05:31:37,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 05:31:37,670 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 121 [2020-07-20 05:31:37,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:31:37,671 INFO L225 Difference]: With dead ends: 59 [2020-07-20 05:31:37,671 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 05:31:37,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=320, Invalid=6000, Unknown=0, NotChecked=0, Total=6320 [2020-07-20 05:31:37,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 05:31:37,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-07-20 05:31:37,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 05:31:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2020-07-20 05:31:37,678 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 121 [2020-07-20 05:31:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:31:37,678 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-07-20 05:31:37,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-20 05:31:37,679 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2020-07-20 05:31:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 05:31:37,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:31:37,680 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 05:31:37,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:31:37,894 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:31:37,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:31:37,895 INFO L82 PathProgramCache]: Analyzing trace with hash 183807880, now seen corresponding path program 31 times [2020-07-20 05:31:37,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:31:37,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597595352] [2020-07-20 05:31:37,896 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:31:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-20 05:31:39,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597595352] [2020-07-20 05:31:39,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749193413] [2020-07-20 05:31:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43b7d685 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 05:31:39,439 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43b7d685 issued 4 check-sat command(s) [2020-07-20 05:31:39,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:31:39,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 141 conjunts are in the unsatisfiable core [2020-07-20 05:31:39,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:31:42,239 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 05:31:42,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:31:42,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 60 [2020-07-20 05:31:42,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017181580] [2020-07-20 05:31:42,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-20 05:31:42,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:31:42,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-20 05:31:42,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3381, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 05:31:42,242 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand 60 states. [2020-07-20 05:31:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:31:46,408 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-07-20 05:31:46,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 05:31:46,410 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 93 [2020-07-20 05:31:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:31:46,412 INFO L225 Difference]: With dead ends: 62 [2020-07-20 05:31:46,412 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 05:31:46,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=376, Invalid=6430, Unknown=0, NotChecked=0, Total=6806 [2020-07-20 05:31:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 05:31:46,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-07-20 05:31:46,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 05:31:46,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-20 05:31:46,420 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 93 [2020-07-20 05:31:46,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:31:46,420 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-20 05:31:46,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-20 05:31:46,420 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-20 05:31:46,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 05:31:46,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:31:46,422 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 05:31:46,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-07-20 05:31:46,638 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:31:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:31:46,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1182847487, now seen corresponding path program 32 times [2020-07-20 05:31:46,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:31:46,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591280411] [2020-07-20 05:31:46,639 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:31:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:48,475 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 05:31:48,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591280411] [2020-07-20 05:31:48,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476544460] [2020-07-20 05:31:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e73d8a1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:31:48,527 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e73d8a1 issued 4 check-sat command(s) [2020-07-20 05:31:48,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:31:48,530 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-20 05:31:48,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:31:50,845 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 05:31:50,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:31:50,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27] total 57 [2020-07-20 05:31:50,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106696033] [2020-07-20 05:31:50,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-20 05:31:50,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:31:50,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-20 05:31:50,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3046, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 05:31:50,847 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 57 states. [2020-07-20 05:31:54,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:31:54,571 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-20 05:31:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 05:31:54,573 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 100 [2020-07-20 05:31:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:31:54,574 INFO L225 Difference]: With dead ends: 64 [2020-07-20 05:31:54,574 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 05:31:54,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=314, Invalid=5692, Unknown=0, NotChecked=0, Total=6006 [2020-07-20 05:31:54,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 05:31:54,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-20 05:31:54,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 05:31:54,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-20 05:31:54,581 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 100 [2020-07-20 05:31:54,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:31:54,581 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-20 05:31:54,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-20 05:31:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-20 05:31:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 05:31:54,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:31:54,583 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 05:31:54,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:31:54,796 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:31:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:31:54,797 INFO L82 PathProgramCache]: Analyzing trace with hash -865344962, now seen corresponding path program 33 times [2020-07-20 05:31:54,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:31:54,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101022861] [2020-07-20 05:31:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:31:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:31:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-20 05:31:56,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101022861] [2020-07-20 05:31:56,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951933609] [2020-07-20 05:31:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5085b6f6 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 05:31:56,849 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5085b6f6 issued 4 check-sat command(s) [2020-07-20 05:31:56,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:31:56,853 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 168 conjunts are in the unsatisfiable core [2020-07-20 05:31:56,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:32:00,360 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 05:32:00,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:32:00,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 31] total 61 [2020-07-20 05:32:00,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483954885] [2020-07-20 05:32:00,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-20 05:32:00,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:32:00,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-20 05:32:00,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3497, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 05:32:00,362 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 61 states. [2020-07-20 05:32:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:32:04,492 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-20 05:32:04,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 05:32:04,493 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 107 [2020-07-20 05:32:04,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:32:04,494 INFO L225 Difference]: With dead ends: 64 [2020-07-20 05:32:04,495 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 05:32:04,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=353, Invalid=6289, Unknown=0, NotChecked=0, Total=6642 [2020-07-20 05:32:04,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 05:32:04,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-20 05:32:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 05:32:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-20 05:32:04,502 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 107 [2020-07-20 05:32:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:32:04,502 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-20 05:32:04,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-20 05:32:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-20 05:32:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 05:32:04,503 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:32:04,503 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 05:32:04,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-20 05:32:04,718 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:32:04,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:32:04,718 INFO L82 PathProgramCache]: Analyzing trace with hash -564676919, now seen corresponding path program 34 times [2020-07-20 05:32:04,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:32:04,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208107623] [2020-07-20 05:32:04,719 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:32:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:07,043 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 05:32:07,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208107623] [2020-07-20 05:32:07,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134966668] [2020-07-20 05:32:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@276ef214 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:32:07,095 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@276ef214 issued 4 check-sat command(s) [2020-07-20 05:32:07,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:32:07,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-20 05:32:07,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:32:09,955 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 05:32:09,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:32:09,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 27] total 61 [2020-07-20 05:32:09,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709953853] [2020-07-20 05:32:09,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-20 05:32:09,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:32:09,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-20 05:32:09,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=3502, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 05:32:09,957 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 61 states. [2020-07-20 05:32:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:32:14,511 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-20 05:32:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 05:32:14,511 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 114 [2020-07-20 05:32:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:32:14,512 INFO L225 Difference]: With dead ends: 64 [2020-07-20 05:32:14,513 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 05:32:14,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=330, Invalid=6312, Unknown=0, NotChecked=0, Total=6642 [2020-07-20 05:32:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 05:32:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-20 05:32:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 05:32:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-20 05:32:14,519 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 114 [2020-07-20 05:32:14,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:32:14,519 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-20 05:32:14,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-20 05:32:14,519 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-20 05:32:14,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 05:32:14,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:32:14,521 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 05:32:14,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:32:14,734 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:32:14,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:32:14,734 INFO L82 PathProgramCache]: Analyzing trace with hash -173240844, now seen corresponding path program 35 times [2020-07-20 05:32:14,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:32:14,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852876496] [2020-07-20 05:32:14,734 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:32:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:17,318 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 05:32:17,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852876496] [2020-07-20 05:32:17,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049141091] [2020-07-20 05:32:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@213a52d 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 05:32:17,376 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@213a52d issued 4 check-sat command(s) [2020-07-20 05:32:17,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:32:17,380 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-20 05:32:17,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:32:20,369 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 05:32:20,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:32:20,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 27] total 63 [2020-07-20 05:32:20,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685397419] [2020-07-20 05:32:20,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-07-20 05:32:20,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:32:20,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-07-20 05:32:20,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3742, Unknown=0, NotChecked=0, Total=3906 [2020-07-20 05:32:20,373 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 63 states. [2020-07-20 05:32:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:32:25,671 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-20 05:32:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 05:32:25,674 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 121 [2020-07-20 05:32:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:32:25,675 INFO L225 Difference]: With dead ends: 64 [2020-07-20 05:32:25,676 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 05:32:25,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=338, Invalid=6634, Unknown=0, NotChecked=0, Total=6972 [2020-07-20 05:32:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 05:32:25,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-20 05:32:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 05:32:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-20 05:32:25,683 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 121 [2020-07-20 05:32:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:32:25,683 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-20 05:32:25,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-07-20 05:32:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-20 05:32:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 05:32:25,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:32:25,684 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 05:32:25,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-20 05:32:25,897 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:32:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:32:25,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1022743187, now seen corresponding path program 36 times [2020-07-20 05:32:25,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:32:25,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626462281] [2020-07-20 05:32:25,899 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:32:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:29,106 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 05:32:29,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626462281] [2020-07-20 05:32:29,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407420420] [2020-07-20 05:32:29,107 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@560bd61e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:32:29,165 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@560bd61e issued 4 check-sat command(s) [2020-07-20 05:32:29,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:32:29,169 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-20 05:32:29,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:32:32,456 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 05:32:32,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:32:32,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 27] total 65 [2020-07-20 05:32:32,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181697645] [2020-07-20 05:32:32,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-20 05:32:32,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:32:32,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-20 05:32:32,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3990, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 05:32:32,459 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 65 states. [2020-07-20 05:32:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:32:37,209 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-07-20 05:32:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 05:32:37,212 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2020-07-20 05:32:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:32:37,213 INFO L225 Difference]: With dead ends: 62 [2020-07-20 05:32:37,213 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 05:32:37,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=346, Invalid=6964, Unknown=0, NotChecked=0, Total=7310 [2020-07-20 05:32:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 05:32:37,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-07-20 05:32:37,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 05:32:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2020-07-20 05:32:37,220 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 128 [2020-07-20 05:32:37,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:32:37,221 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2020-07-20 05:32:37,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-20 05:32:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2020-07-20 05:32:37,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 05:32:37,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:32:37,222 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 05:32:37,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-20 05:32:37,436 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:32:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:32:37,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1134604024, now seen corresponding path program 37 times [2020-07-20 05:32:37,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:32:37,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407961323] [2020-07-20 05:32:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:32:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 215 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-20 05:32:39,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407961323] [2020-07-20 05:32:39,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316268832] [2020-07-20 05:32:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@414974e4 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 05:32:39,414 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@414974e4 issued 4 check-sat command(s) [2020-07-20 05:32:39,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:32:39,418 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-20 05:32:39,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:32:41,852 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 05:32:41,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:32:41,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 23] total 51 [2020-07-20 05:32:41,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564074449] [2020-07-20 05:32:41,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-20 05:32:41,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:32:41,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-20 05:32:41,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2418, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 05:32:41,854 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand 51 states. [2020-07-20 05:32:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:32:46,251 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2020-07-20 05:32:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 05:32:46,251 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 93 [2020-07-20 05:32:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:32:46,252 INFO L225 Difference]: With dead ends: 64 [2020-07-20 05:32:46,252 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 05:32:46,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=282, Invalid=4548, Unknown=0, NotChecked=0, Total=4830 [2020-07-20 05:32:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 05:32:46,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-07-20 05:32:46,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 05:32:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2020-07-20 05:32:46,258 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 93 [2020-07-20 05:32:46,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:32:46,258 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2020-07-20 05:32:46,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-20 05:32:46,259 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2020-07-20 05:32:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 05:32:46,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:32:46,260 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 05:32:46,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-20 05:32:46,461 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:32:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:32:46,462 INFO L82 PathProgramCache]: Analyzing trace with hash -893562198, now seen corresponding path program 38 times [2020-07-20 05:32:46,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:32:46,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833105873] [2020-07-20 05:32:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:32:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:32:49,964 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 05:32:49,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833105873] [2020-07-20 05:32:49,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620494452] [2020-07-20 05:32:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43c7547f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:32:50,036 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43c7547f issued 4 check-sat command(s) [2020-07-20 05:32:50,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:32:50,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-20 05:32:50,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:32:54,030 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 05:32:54,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:32:54,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 27] total 67 [2020-07-20 05:32:54,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211776671] [2020-07-20 05:32:54,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-20 05:32:54,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:32:54,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-20 05:32:54,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4246, Unknown=0, NotChecked=0, Total=4422 [2020-07-20 05:32:54,032 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand 67 states. [2020-07-20 05:32:59,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:32:59,792 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2020-07-20 05:32:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 05:32:59,795 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 135 [2020-07-20 05:32:59,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:32:59,796 INFO L225 Difference]: With dead ends: 64 [2020-07-20 05:32:59,797 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 05:32:59,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=366, Invalid=7644, Unknown=0, NotChecked=0, Total=8010 [2020-07-20 05:32:59,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 05:32:59,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-07-20 05:32:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 05:32:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2020-07-20 05:32:59,802 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 135 [2020-07-20 05:32:59,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:32:59,803 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2020-07-20 05:32:59,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-20 05:32:59,803 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2020-07-20 05:32:59,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 05:32:59,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:32:59,804 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 05:33:00,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-20 05:33:00,017 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:33:00,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:33:00,017 INFO L82 PathProgramCache]: Analyzing trace with hash -992427037, now seen corresponding path program 39 times [2020-07-20 05:33:00,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:33:00,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041106242] [2020-07-20 05:33:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:33:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-20 05:33:02,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041106242] [2020-07-20 05:33:02,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834975749] [2020-07-20 05:33:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7af5356f 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 05:33:02,409 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7af5356f issued 4 check-sat command(s) [2020-07-20 05:33:02,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:33:02,415 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 153 conjunts are in the unsatisfiable core [2020-07-20 05:33:02,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:33:07,325 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 05:33:07,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:33:07,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 64 [2020-07-20 05:33:07,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715324717] [2020-07-20 05:33:07,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-20 05:33:07,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:33:07,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-20 05:33:07,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3863, Unknown=0, NotChecked=0, Total=4032 [2020-07-20 05:33:07,327 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand 64 states. [2020-07-20 05:33:16,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:33:16,113 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2020-07-20 05:33:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 05:33:16,117 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 100 [2020-07-20 05:33:16,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:33:16,119 INFO L225 Difference]: With dead ends: 65 [2020-07-20 05:33:16,119 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 05:33:16,121 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 05:33:16,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 05:33:16,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-07-20 05:33:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 05:33:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-20 05:33:16,154 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 100 [2020-07-20 05:33:16,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:33:16,155 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-20 05:33:16,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-20 05:33:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-20 05:33:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 05:33:16,156 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:33:16,156 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 05:33:16,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:33:16,371 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:33:16,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:33:16,372 INFO L82 PathProgramCache]: Analyzing trace with hash -445760116, now seen corresponding path program 40 times [2020-07-20 05:33:16,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:33:16,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763830059] [2020-07-20 05:33:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:33:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:19,900 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 05:33:19,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763830059] [2020-07-20 05:33:19,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865704672] [2020-07-20 05:33:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@55017115 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:33:19,960 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@55017115 issued 4 check-sat command(s) [2020-07-20 05:33:19,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:33:19,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-20 05:33:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:33:24,684 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 05:33:24,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:33:24,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 29] total 61 [2020-07-20 05:33:24,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381250539] [2020-07-20 05:33:24,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-20 05:33:24,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:33:24,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-20 05:33:24,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3504, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 05:33:24,686 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 61 states. [2020-07-20 05:33:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:33:32,650 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-20 05:33:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 05:33:32,652 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 107 [2020-07-20 05:33:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:33:32,653 INFO L225 Difference]: With dead ends: 67 [2020-07-20 05:33:32,653 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 05:33:32,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=340, Invalid=6632, Unknown=0, NotChecked=0, Total=6972 [2020-07-20 05:33:32,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 05:33:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-20 05:33:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 05:33:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-20 05:33:32,659 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 107 [2020-07-20 05:33:32,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:33:32,659 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-20 05:33:32,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-20 05:33:32,660 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-20 05:33:32,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 05:33:32,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:33:32,661 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 05:33:32,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-07-20 05:33:32,872 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:33:32,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:33:32,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1805961107, now seen corresponding path program 41 times [2020-07-20 05:33:32,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:33:32,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21777165] [2020-07-20 05:33:32,873 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:33:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:35,839 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 05:33:35,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21777165] [2020-07-20 05:33:35,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968208088] [2020-07-20 05:33:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66d38c7c 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 05:33:35,901 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66d38c7c issued 4 check-sat command(s) [2020-07-20 05:33:35,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:33:35,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-20 05:33:35,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:33:40,149 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 05:33:40,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:33:40,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 29] total 63 [2020-07-20 05:33:40,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399851030] [2020-07-20 05:33:40,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-07-20 05:33:40,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:33:40,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-07-20 05:33:40,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=3744, Unknown=0, NotChecked=0, Total=3906 [2020-07-20 05:33:40,151 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 63 states. [2020-07-20 05:33:47,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:33:47,691 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-20 05:33:47,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 05:33:47,695 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 114 [2020-07-20 05:33:47,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:33:47,697 INFO L225 Difference]: With dead ends: 67 [2020-07-20 05:33:47,697 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 05:33:47,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=348, Invalid=6962, Unknown=0, NotChecked=0, Total=7310 [2020-07-20 05:33:47,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 05:33:47,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-20 05:33:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 05:33:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-20 05:33:47,705 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 114 [2020-07-20 05:33:47,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:33:47,707 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-20 05:33:47,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-07-20 05:33:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-20 05:33:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 05:33:47,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:33:47,709 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 05:33:47,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:33:47,920 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:33:47,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:33:47,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1954300290, now seen corresponding path program 42 times [2020-07-20 05:33:47,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:33:47,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658241568] [2020-07-20 05:33:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:33:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:33:52,820 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 05:33:52,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658241568] [2020-07-20 05:33:52,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464217865] [2020-07-20 05:33:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@258b0790 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:33:52,879 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@258b0790 issued 4 check-sat command(s) [2020-07-20 05:33:52,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:33:52,884 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-20 05:33:52,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:33:57,371 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 05:33:57,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:33:57,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 29] total 65 [2020-07-20 05:33:57,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639845788] [2020-07-20 05:33:57,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-20 05:33:57,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:33:57,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-20 05:33:57,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3992, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 05:33:57,373 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 65 states. [2020-07-20 05:34:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:34:05,179 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-20 05:34:05,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 05:34:05,183 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 121 [2020-07-20 05:34:05,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:34:05,185 INFO L225 Difference]: With dead ends: 67 [2020-07-20 05:34:05,185 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 05:34:05,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=356, Invalid=7300, Unknown=0, NotChecked=0, Total=7656 [2020-07-20 05:34:05,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 05:34:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-20 05:34:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 05:34:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-20 05:34:05,193 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 121 [2020-07-20 05:34:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:34:05,193 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-20 05:34:05,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-20 05:34:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-20 05:34:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 05:34:05,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:34:05,195 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 05:34:05,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:34:05,410 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:34:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:34:05,411 INFO L82 PathProgramCache]: Analyzing trace with hash -970320905, now seen corresponding path program 43 times [2020-07-20 05:34:05,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:34:05,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756402327] [2020-07-20 05:34:05,411 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:34:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:10,406 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 05:34:10,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756402327] [2020-07-20 05:34:10,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47438773] [2020-07-20 05:34:10,407 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@47b17bc0 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 05:34:10,469 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@47b17bc0 issued 4 check-sat command(s) [2020-07-20 05:34:10,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:34:10,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-20 05:34:10,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:34:16,143 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 05:34:16,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:34:16,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 29] total 67 [2020-07-20 05:34:16,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367489327] [2020-07-20 05:34:16,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-20 05:34:16,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:34:16,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-20 05:34:16,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=4248, Unknown=0, NotChecked=0, Total=4422 [2020-07-20 05:34:16,145 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 67 states. [2020-07-20 05:34:25,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:34:25,485 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-20 05:34:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 05:34:25,489 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 128 [2020-07-20 05:34:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:34:25,490 INFO L225 Difference]: With dead ends: 67 [2020-07-20 05:34:25,491 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 05:34:25,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=364, Invalid=7646, Unknown=0, NotChecked=0, Total=8010 [2020-07-20 05:34:25,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 05:34:25,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-20 05:34:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 05:34:25,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-20 05:34:25,496 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 128 [2020-07-20 05:34:25,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:34:25,497 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-20 05:34:25,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-20 05:34:25,497 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-20 05:34:25,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 05:34:25,498 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:34:25,498 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 05:34:25,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-07-20 05:34:25,711 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:34:25,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:34:25,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1081659784, now seen corresponding path program 44 times [2020-07-20 05:34:25,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:34:25,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799662607] [2020-07-20 05:34:25,713 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:34:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:32,173 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 05:34:32,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799662607] [2020-07-20 05:34:32,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317366137] [2020-07-20 05:34:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40fba0c1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:34:32,248 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40fba0c1 issued 4 check-sat command(s) [2020-07-20 05:34:32,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:34:32,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-20 05:34:32,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:34:41,348 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 05:34:41,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:34:41,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 29] total 69 [2020-07-20 05:34:41,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764327217] [2020-07-20 05:34:41,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-20 05:34:41,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:34:41,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-20 05:34:41,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=4512, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 05:34:41,351 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 69 states. [2020-07-20 05:34:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:34:54,857 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-20 05:34:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 05:34:54,862 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 135 [2020-07-20 05:34:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:34:54,864 INFO L225 Difference]: With dead ends: 67 [2020-07-20 05:34:54,864 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 05:34:54,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=372, Invalid=8000, Unknown=0, NotChecked=0, Total=8372 [2020-07-20 05:34:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 05:34:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-20 05:34:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 05:34:54,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-20 05:34:54,871 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 135 [2020-07-20 05:34:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:34:54,871 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-20 05:34:54,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-20 05:34:54,872 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-20 05:34:54,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 05:34:54,873 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:34:54,873 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 05:34:55,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-07-20 05:34:55,089 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:34:55,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:34:55,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1602926209, now seen corresponding path program 45 times [2020-07-20 05:34:55,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:34:55,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270895188] [2020-07-20 05:34:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:34:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:34:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:01,391 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 05:35:01,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270895188] [2020-07-20 05:35:01,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950863992] [2020-07-20 05:35:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@362b06d1 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 05:35:01,458 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@362b06d1 issued 4 check-sat command(s) [2020-07-20 05:35:01,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:35:01,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-07-20 05:35:01,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:35:08,837 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 05:35:08,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:35:08,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 29] total 71 [2020-07-20 05:35:08,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311072327] [2020-07-20 05:35:08,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-07-20 05:35:08,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:35:08,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-07-20 05:35:08,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=4784, Unknown=0, NotChecked=0, Total=4970 [2020-07-20 05:35:08,839 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 71 states. [2020-07-20 05:35:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:35:22,827 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-20 05:35:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 05:35:22,831 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 142 [2020-07-20 05:35:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:35:22,833 INFO L225 Difference]: With dead ends: 65 [2020-07-20 05:35:22,833 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 05:35:22,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=380, Invalid=8362, Unknown=0, NotChecked=0, Total=8742 [2020-07-20 05:35:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 05:35:22,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-07-20 05:35:22,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 05:35:22,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2020-07-20 05:35:22,839 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 142 [2020-07-20 05:35:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:35:22,839 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2020-07-20 05:35:22,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-07-20 05:35:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2020-07-20 05:35:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 05:35:22,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:35:22,841 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 05:35:23,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-07-20 05:35:23,053 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:35:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:35:23,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1051174864, now seen corresponding path program 46 times [2020-07-20 05:35:23,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:35:23,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011070551] [2020-07-20 05:35:23,054 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:35:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 42 proven. 294 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-20 05:35:26,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011070551] [2020-07-20 05:35:26,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932074577] [2020-07-20 05:35:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@270ca574 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:35:26,711 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@270ca574 issued 4 check-sat command(s) [2020-07-20 05:35:26,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:35:26,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-20 05:35:26,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:35:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 8 proven. 274 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2020-07-20 05:35:30,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:35:30,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 25] total 57 [2020-07-20 05:35:30,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845978887] [2020-07-20 05:35:30,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-20 05:35:30,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:35:30,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-20 05:35:30,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=3044, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 05:35:30,848 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand 57 states. [2020-07-20 05:35:37,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:35:37,825 INFO L93 Difference]: Finished difference Result 67 states and 99 transitions. [2020-07-20 05:35:37,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 05:35:37,829 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 107 [2020-07-20 05:35:37,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:35:37,831 INFO L225 Difference]: With dead ends: 67 [2020-07-20 05:35:37,831 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 05:35:37,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=316, Invalid=5690, Unknown=0, NotChecked=0, Total=6006 [2020-07-20 05:35:37,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 05:35:37,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-07-20 05:35:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 05:35:37,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2020-07-20 05:35:37,837 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 107 [2020-07-20 05:35:37,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:35:37,837 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2020-07-20 05:35:37,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-20 05:35:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2020-07-20 05:35:37,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 05:35:37,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:35:37,839 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 05:35:38,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:35:38,052 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:35:38,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:35:38,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1270577827, now seen corresponding path program 47 times [2020-07-20 05:35:38,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:35:38,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605640024] [2020-07-20 05:35:38,053 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:35:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:35:45,122 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 05:35:45,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605640024] [2020-07-20 05:35:45,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792910071] [2020-07-20 05:35:45,122 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6923ed86 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 05:35:45,186 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6923ed86 issued 4 check-sat command(s) [2020-07-20 05:35:45,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:35:45,191 WARN L261 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-07-20 05:35:45,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:35:52,175 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 05:35:52,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:35:52,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 27] total 69 [2020-07-20 05:35:52,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977076374] [2020-07-20 05:35:52,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-20 05:35:52,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:35:52,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-20 05:35:52,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=4510, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 05:35:52,177 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand 69 states. [2020-07-20 05:36:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:36:05,654 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2020-07-20 05:36:05,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 05:36:05,662 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 142 [2020-07-20 05:36:05,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:36:05,663 INFO L225 Difference]: With dead ends: 65 [2020-07-20 05:36:05,663 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 05:36:05,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=362, Invalid=7648, Unknown=0, NotChecked=0, Total=8010 [2020-07-20 05:36:05,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 05:36:05,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-07-20 05:36:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 05:36:05,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-20 05:36:05,670 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 142 [2020-07-20 05:36:05,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:36:05,671 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-20 05:36:05,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-20 05:36:05,671 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-20 05:36:05,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-20 05:36:05,673 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:36:05,673 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 05:36:05,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-07-20 05:36:05,888 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:36:05,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:36:05,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1655069586, now seen corresponding path program 48 times [2020-07-20 05:36:05,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:36:05,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131772096] [2020-07-20 05:36:05,890 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:36:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:15,630 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 05:36:15,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131772096] [2020-07-20 05:36:15,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480328700] [2020-07-20 05:36:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6bc2edb4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:36:15,709 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6bc2edb4 issued 4 check-sat command(s) [2020-07-20 05:36:15,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:36:15,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 241 conjunts are in the unsatisfiable core [2020-07-20 05:36:15,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:36:26,797 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 05:36:26,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:36:26,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 29] total 73 [2020-07-20 05:36:26,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294764409] [2020-07-20 05:36:26,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-07-20 05:36:26,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:36:26,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-07-20 05:36:26,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5064, Unknown=0, NotChecked=0, Total=5256 [2020-07-20 05:36:26,799 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 73 states. [2020-07-20 05:36:34,480 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 05:36:36,054 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 05:36:39,559 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 05:36:46,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:36:46,830 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-20 05:36:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 05:36:46,835 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 149 [2020-07-20 05:36:46,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:36:46,836 INFO L225 Difference]: With dead ends: 65 [2020-07-20 05:36:46,837 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 05:36:46,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=388, Invalid=8732, Unknown=0, NotChecked=0, Total=9120 [2020-07-20 05:36:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 05:36:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-07-20 05:36:46,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 05:36:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2020-07-20 05:36:46,843 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 149 [2020-07-20 05:36:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:36:46,843 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2020-07-20 05:36:46,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-07-20 05:36:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2020-07-20 05:36:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 05:36:46,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:36:46,844 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 05:36:47,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-07-20 05:36:47,046 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:36:47,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:36:47,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1733939138, now seen corresponding path program 49 times [2020-07-20 05:36:47,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:36:47,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076569109] [2020-07-20 05:36:47,048 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:36:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:36:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-20 05:36:52,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076569109] [2020-07-20 05:36:52,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641896127] [2020-07-20 05:36:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34817e8a 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 05:36:52,244 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34817e8a issued 4 check-sat command(s) [2020-07-20 05:36:52,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:36:52,249 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 165 conjunts are in the unsatisfiable core [2020-07-20 05:36:52,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:37:03,829 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 05:37:03,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:37:03,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 68 [2020-07-20 05:37:03,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240521996] [2020-07-20 05:37:03,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-20 05:37:03,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:37:03,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-20 05:37:03,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=4377, Unknown=0, NotChecked=0, Total=4556 [2020-07-20 05:37:03,833 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand 68 states. [2020-07-20 05:37:13,197 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 05:37:19,450 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2020-07-20 05:37:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:37:20,824 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2020-07-20 05:37:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 05:37:20,834 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 107 [2020-07-20 05:37:20,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:37:20,836 INFO L225 Difference]: With dead ends: 68 [2020-07-20 05:37:20,836 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 05:37:20,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=436, Invalid=8494, Unknown=0, NotChecked=0, Total=8930 [2020-07-20 05:37:20,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 05:37:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-07-20 05:37:20,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 05:37:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-20 05:37:20,849 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 107 [2020-07-20 05:37:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:37:20,849 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-20 05:37:20,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-20 05:37:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-20 05:37:20,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 05:37:20,851 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:37:20,852 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 05:37:21,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:37:21,066 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:37:21,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:37:21,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1739770251, now seen corresponding path program 50 times [2020-07-20 05:37:21,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:37:21,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232867129] [2020-07-20 05:37:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:37:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:37:28,019 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 05:37:28,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232867129] [2020-07-20 05:37:28,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080562387] [2020-07-20 05:37:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e0560 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:37:28,095 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e0560 issued 4 check-sat command(s) [2020-07-20 05:37:28,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:37:28,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-20 05:37:28,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:37:39,551 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 05:37:39,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:37:39,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31] total 65 [2020-07-20 05:37:39,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505220410] [2020-07-20 05:37:39,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-20 05:37:39,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:37:39,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-20 05:37:39,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3994, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 05:37:39,554 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 65 states. [2020-07-20 05:37:49,758 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 05:38:00,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:38:00,320 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 05:38:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 05:38:00,331 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 114 [2020-07-20 05:38:00,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:38:00,332 INFO L225 Difference]: With dead ends: 70 [2020-07-20 05:38:00,333 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 05:38:00,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=366, Invalid=7644, Unknown=0, NotChecked=0, Total=8010 [2020-07-20 05:38:00,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 05:38:00,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-20 05:38:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 05:38:00,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-20 05:38:00,340 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 114 [2020-07-20 05:38:00,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:38:00,341 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-20 05:38:00,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-20 05:38:00,341 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-20 05:38:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 05:38:00,342 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:38:00,342 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 05:38:00,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-07-20 05:38:00,557 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:38:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:38:00,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1164219276, now seen corresponding path program 51 times [2020-07-20 05:38:00,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:38:00,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965673468] [2020-07-20 05:38:00,558 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:38:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:07,855 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 05:38:07,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965673468] [2020-07-20 05:38:07,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043887888] [2020-07-20 05:38:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@437341bd 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 05:38:07,916 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@437341bd issued 4 check-sat command(s) [2020-07-20 05:38:07,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:38:07,921 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 192 conjunts are in the unsatisfiable core [2020-07-20 05:38:07,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:38:22,770 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 05:38:22,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:38:22,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 35] total 69 [2020-07-20 05:38:22,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128263655] [2020-07-20 05:38:22,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-20 05:38:22,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:38:22,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-20 05:38:22,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=4509, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 05:38:22,773 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 69 states. [2020-07-20 05:38:25,074 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-20 05:38:25,611 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-20 05:38:26,156 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 05:38:26,979 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:27,811 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:28,641 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:29,230 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:30,033 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:31,096 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:31,927 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:32,512 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:33,369 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:33,954 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:34,795 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:35,360 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:36,177 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:36,764 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:37,859 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:38,635 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:39,466 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:40,058 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 05:38:41,510 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-07-20 05:38:42,138 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-07-20 05:38:44,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:38:44,319 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 05:38:44,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 05:38:44,328 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 121 [2020-07-20 05:38:44,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:38:44,329 INFO L225 Difference]: With dead ends: 70 [2020-07-20 05:38:44,329 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 05:38:44,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=409, Invalid=8333, Unknown=0, NotChecked=0, Total=8742 [2020-07-20 05:38:44,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 05:38:44,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-20 05:38:44,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 05:38:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-20 05:38:44,336 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 121 [2020-07-20 05:38:44,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:38:44,336 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-20 05:38:44,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-20 05:38:44,337 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-20 05:38:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 05:38:44,338 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:38:44,338 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 05:38:44,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:38:44,551 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:38:44,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:38:44,551 INFO L82 PathProgramCache]: Analyzing trace with hash 325513663, now seen corresponding path program 52 times [2020-07-20 05:38:44,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:38:44,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362114028] [2020-07-20 05:38:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:38:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:38:55,007 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 05:38:55,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362114028] [2020-07-20 05:38:55,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772931439] [2020-07-20 05:38:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a5d1a44 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:38:55,076 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a5d1a44 issued 4 check-sat command(s) [2020-07-20 05:38:55,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:38:55,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-20 05:38:55,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:39:10,948 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 05:39:10,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:39:10,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 31] total 69 [2020-07-20 05:39:10,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48150078] [2020-07-20 05:39:10,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-20 05:39:10,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:39:10,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-20 05:39:10,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=4514, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 05:39:10,954 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 69 states. [2020-07-20 05:39:12,361 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2020-07-20 05:39:15,068 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-20 05:39:15,705 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 05:39:16,870 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 05:39:17,465 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 05:39:18,430 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 05:39:19,023 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 05:39:19,975 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 05:39:20,819 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 05:39:21,889 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 05:39:22,442 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 05:39:23,841 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 05:39:26,109 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 05:39:26,653 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 05:39:27,538 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 05:39:28,084 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 05:39:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:39:33,010 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 05:39:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 05:39:33,020 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 128 [2020-07-20 05:39:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:39:33,021 INFO L225 Difference]: With dead ends: 70 [2020-07-20 05:39:33,021 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 05:39:33,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=382, Invalid=8360, Unknown=0, NotChecked=0, Total=8742 [2020-07-20 05:39:33,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 05:39:33,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-20 05:39:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 05:39:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-20 05:39:33,029 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 128 [2020-07-20 05:39:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:39:33,029 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-20 05:39:33,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-20 05:39:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-20 05:39:33,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 05:39:33,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:39:33,031 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 05:39:33,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-07-20 05:39:33,247 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:39:33,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:39:33,247 INFO L82 PathProgramCache]: Analyzing trace with hash 634544554, now seen corresponding path program 53 times [2020-07-20 05:39:33,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:39:33,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590784314] [2020-07-20 05:39:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:39:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:35,105 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-20 05:39:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:39:42,853 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 05:39:42,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590784314] [2020-07-20 05:39:42,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476121813] [2020-07-20 05:39:42,854 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bed4571 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 05:39:42,918 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bed4571 issued 4 check-sat command(s) [2020-07-20 05:39:42,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:39:42,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-20 05:39:42,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:39:52,686 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 05:39:52,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:39:52,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 31] total 71 [2020-07-20 05:39:52,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635727885] [2020-07-20 05:39:52,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-07-20 05:39:52,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:39:52,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-07-20 05:39:52,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=4786, Unknown=0, NotChecked=0, Total=4970 [2020-07-20 05:39:52,688 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 71 states. [2020-07-20 05:40:12,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:40:12,068 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 05:40:12,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 05:40:12,078 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 135 [2020-07-20 05:40:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:40:12,080 INFO L225 Difference]: With dead ends: 70 [2020-07-20 05:40:12,080 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 05:40:12,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=390, Invalid=8730, Unknown=0, NotChecked=0, Total=9120 [2020-07-20 05:40:12,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 05:40:12,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-20 05:40:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 05:40:12,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-20 05:40:12,087 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 135 [2020-07-20 05:40:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:40:12,088 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-20 05:40:12,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-07-20 05:40:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-20 05:40:12,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 05:40:12,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:40:12,089 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 05:40:12,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-07-20 05:40:12,303 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:40:12,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:40:12,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1864653815, now seen corresponding path program 54 times [2020-07-20 05:40:12,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:40:12,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800533665] [2020-07-20 05:40:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:40:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:12,682 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2020-07-20 05:40:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:23,217 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 05:40:23,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800533665] [2020-07-20 05:40:23,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257356164] [2020-07-20 05:40:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@41da6e9b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:40:23,288 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@41da6e9b issued 4 check-sat command(s) [2020-07-20 05:40:23,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:40:23,294 WARN L261 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-07-20 05:40:23,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:40:35,419 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 05:40:35,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:40:35,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 31] total 73 [2020-07-20 05:40:35,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280477114] [2020-07-20 05:40:35,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-07-20 05:40:35,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:40:35,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-07-20 05:40:35,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5066, Unknown=0, NotChecked=0, Total=5256 [2020-07-20 05:40:35,422 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 73 states. [2020-07-20 05:40:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:40:54,862 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 05:40:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 05:40:54,862 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 142 [2020-07-20 05:40:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:40:54,863 INFO L225 Difference]: With dead ends: 70 [2020-07-20 05:40:54,863 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 05:40:54,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=398, Invalid=9108, Unknown=0, NotChecked=0, Total=9506 [2020-07-20 05:40:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 05:40:54,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-20 05:40:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 05:40:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-20 05:40:54,870 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 142 [2020-07-20 05:40:54,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:40:54,870 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-20 05:40:54,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-07-20 05:40:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-20 05:40:54,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-20 05:40:54,872 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:40:54,872 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 05:40:55,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:40:55,086 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:40:55,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:40:55,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1103515680, now seen corresponding path program 55 times [2020-07-20 05:40:55,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:40:55,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208377596] [2020-07-20 05:40:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:40:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:40:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:04,866 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 05:41:04,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208377596] [2020-07-20 05:41:04,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422074160] [2020-07-20 05:41:04,867 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@709c1f5c 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 05:41:04,942 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@709c1f5c issued 4 check-sat command(s) [2020-07-20 05:41:04,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:41:04,947 WARN L261 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 241 conjunts are in the unsatisfiable core [2020-07-20 05:41:04,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:41:18,273 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 05:41:18,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:41:18,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 31] total 75 [2020-07-20 05:41:18,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189700284] [2020-07-20 05:41:18,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-20 05:41:18,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:41:18,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-20 05:41:18,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=5354, Unknown=0, NotChecked=0, Total=5550 [2020-07-20 05:41:18,275 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 75 states. [2020-07-20 05:41:35,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:41:35,658 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 05:41:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 05:41:35,666 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 149 [2020-07-20 05:41:35,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:41:35,667 INFO L225 Difference]: With dead ends: 70 [2020-07-20 05:41:35,668 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 05:41:35,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=406, Invalid=9494, Unknown=0, NotChecked=0, Total=9900 [2020-07-20 05:41:35,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 05:41:35,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-20 05:41:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 05:41:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-20 05:41:35,673 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 149 [2020-07-20 05:41:35,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:41:35,674 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-20 05:41:35,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-20 05:41:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-20 05:41:35,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-07-20 05:41:35,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:41:35,675 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 05:41:35,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-07-20 05:41:35,888 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:41:35,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:41:35,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1632850605, now seen corresponding path program 56 times [2020-07-20 05:41:35,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:41:35,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124519883] [2020-07-20 05:41:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:41:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:41:45,585 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 05:41:45,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124519883] [2020-07-20 05:41:45,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035665117] [2020-07-20 05:41:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29a4af5f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:41:45,662 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29a4af5f issued 4 check-sat command(s) [2020-07-20 05:41:45,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:41:45,666 WARN L261 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 253 conjunts are in the unsatisfiable core [2020-07-20 05:41:45,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:41:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 22 proven. 619 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2020-07-20 05:41:57,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:41:57,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 31] total 77 [2020-07-20 05:41:57,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548231315] [2020-07-20 05:41:57,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-07-20 05:41:57,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:41:57,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-07-20 05:41:57,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=5650, Unknown=0, NotChecked=0, Total=5852 [2020-07-20 05:41:57,352 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 77 states. [2020-07-20 05:42:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:42:15,681 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2020-07-20 05:42:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 05:42:15,691 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 156 [2020-07-20 05:42:15,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:42:15,692 INFO L225 Difference]: With dead ends: 68 [2020-07-20 05:42:15,692 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 05:42:15,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=414, Invalid=9888, Unknown=0, NotChecked=0, Total=10302 [2020-07-20 05:42:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 05:42:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-07-20 05:42:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 05:42:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 83 transitions. [2020-07-20 05:42:15,697 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 83 transitions. Word has length 156 [2020-07-20 05:42:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:42:15,697 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 83 transitions. [2020-07-20 05:42:15,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-07-20 05:42:15,697 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 83 transitions. [2020-07-20 05:42:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 05:42:15,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:42:15,698 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 05:42:15,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:42:15,911 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:42:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:42:15,911 INFO L82 PathProgramCache]: Analyzing trace with hash 186363784, now seen corresponding path program 57 times [2020-07-20 05:42:15,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:42:15,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982398144] [2020-07-20 05:42:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:42:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 18 proven. 217 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2020-07-20 05:42:21,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982398144] [2020-07-20 05:42:21,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782124301] [2020-07-20 05:42:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@254494d8 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 05:42:21,098 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@254494d8 issued 4 check-sat command(s) [2020-07-20 05:42:21,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:42:21,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 141 conjunts are in the unsatisfiable core [2020-07-20 05:42:21,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:42:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-20 05:42:31,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:42:31,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 60 [2020-07-20 05:42:31,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831190201] [2020-07-20 05:42:31,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-20 05:42:31,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:42:31,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-20 05:42:31,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3375, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 05:42:31,779 INFO L87 Difference]: Start difference. First operand 58 states and 83 transitions. Second operand 60 states. [2020-07-20 05:42:35,089 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-20 05:42:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:42:50,329 INFO L93 Difference]: Finished difference Result 68 states and 103 transitions. [2020-07-20 05:42:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 05:42:50,338 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 93 [2020-07-20 05:42:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:42:50,339 INFO L225 Difference]: With dead ends: 68 [2020-07-20 05:42:50,339 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 05:42:50,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=372, Invalid=6108, Unknown=0, NotChecked=0, Total=6480 [2020-07-20 05:42:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 05:42:50,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-07-20 05:42:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 05:42:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 96 transitions. [2020-07-20 05:42:50,346 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 96 transitions. Word has length 93 [2020-07-20 05:42:50,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:42:50,347 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 96 transitions. [2020-07-20 05:42:50,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-20 05:42:50,347 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 96 transitions. [2020-07-20 05:42:50,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 05:42:50,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:42:50,348 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 05:42:50,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-07-20 05:42:50,562 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:42:50,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:42:50,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1678979596, now seen corresponding path program 58 times [2020-07-20 05:42:50,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:42:50,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115327956] [2020-07-20 05:42:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3855953d [2020-07-20 05:42:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:42:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat