/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:05:11,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:05:11,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:05:11,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 23:05:11,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:05:11,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:05:11,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:05:11,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:05:11,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:05:11,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:05:11,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:05:11,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:05:11,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:05:11,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:05:11,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:05:11,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:05:11,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:05:11,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:05:11,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:05:11,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:05:11,820 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:05:11,829 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:05:11,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:05:11,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:05:11,831 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:05:11,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:05:11,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:05:11,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:05:11,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:05:11,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:05:11,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:05:11,833 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:05:11,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:05:11,833 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:05:11,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:05:11,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:05:11,834 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:05:11,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:05:11,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:05:11,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:05:11,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:05:11,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:05:11,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:05:11,835 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 23:05:12,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:05:12,148 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:05:12,151 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:05:12,153 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:05:12,153 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:05:12,154 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-08-22 23:05:12,231 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b5eaceff/22f01ff1d3354479987561c2bada1a68/FLAG19b0f83e3 [2020-08-22 23:05:12,721 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:05:12,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-08-22 23:05:12,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b5eaceff/22f01ff1d3354479987561c2bada1a68/FLAG19b0f83e3 [2020-08-22 23:05:13,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b5eaceff/22f01ff1d3354479987561c2bada1a68 [2020-08-22 23:05:13,107 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:05:13,110 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:05:13,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:05:13,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:05:13,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:05:13,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:05:13" (1/1) ... [2020-08-22 23:05:13,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@335b34c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:13, skipping insertion in model container [2020-08-22 23:05:13,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:05:13" (1/1) ... [2020-08-22 23:05:13,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:05:13,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:05:13,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:05:13,352 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:05:13,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:05:13,391 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:05:13,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:13 WrapperNode [2020-08-22 23:05:13,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:05:13,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:05:13,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:05:13,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:05:13,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:13" (1/1) ... [2020-08-22 23:05:13,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:13" (1/1) ... [2020-08-22 23:05:13,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:13" (1/1) ... [2020-08-22 23:05:13,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:13" (1/1) ... [2020-08-22 23:05:13,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:13" (1/1) ... [2020-08-22 23:05:13,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:13" (1/1) ... [2020-08-22 23:05:13,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:13" (1/1) ... [2020-08-22 23:05:13,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:05:13,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:05:13,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:05:13,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:05:13,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:13" (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 [2020-08-22 23:05:13,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:05:13,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:05:13,569 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:05:13,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:05:13,569 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:05:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:05:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:05:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:05:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:05:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:05:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:05:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:05:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:05:13,764 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:05:13,764 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:05:13,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:05:13 BoogieIcfgContainer [2020-08-22 23:05:13,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:05:13,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:05:13,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:05:13,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:05:13,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:05:13" (1/3) ... [2020-08-22 23:05:13,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b20056f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:05:13, skipping insertion in model container [2020-08-22 23:05:13,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:13" (2/3) ... [2020-08-22 23:05:13,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b20056f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:05:13, skipping insertion in model container [2020-08-22 23:05:13,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:05:13" (3/3) ... [2020-08-22 23:05:13,777 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-08-22 23:05:13,788 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:05:13,796 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:05:13,812 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:05:13,876 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:05:13,876 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:05:13,877 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:05:13,877 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:05:13,877 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:05:13,877 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:05:13,877 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:05:13,878 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:05:13,912 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-22 23:05:13,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-22 23:05:13,926 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:13,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:13,927 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:13,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:13,935 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-08-22 23:05:13,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:13,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766127197] [2020-08-22 23:05:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:14,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766127197] [2020-08-22 23:05:14,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:14,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 23:05:14,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820543110] [2020-08-22 23:05:14,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 23:05:14,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:14,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 23:05:14,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:05:14,080 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-08-22 23:05:14,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:14,103 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-08-22 23:05:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 23:05:14,104 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-08-22 23:05:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:14,112 INFO L225 Difference]: With dead ends: 41 [2020-08-22 23:05:14,112 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 23:05:14,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:05:14,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 23:05:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-22 23:05:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 23:05:14,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-08-22 23:05:14,152 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2020-08-22 23:05:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:14,152 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-08-22 23:05:14,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 23:05:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-08-22 23:05:14,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 23:05:14,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:14,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:14,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:05:14,155 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:14,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:14,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1179723712, now seen corresponding path program 1 times [2020-08-22 23:05:14,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:14,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242334693] [2020-08-22 23:05:14,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:14,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242334693] [2020-08-22 23:05:14,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:14,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 23:05:14,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347776352] [2020-08-22 23:05:14,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 23:05:14,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:14,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 23:05:14,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 23:05:14,222 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2020-08-22 23:05:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:14,309 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-08-22 23:05:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 23:05:14,310 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-08-22 23:05:14,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:14,313 INFO L225 Difference]: With dead ends: 50 [2020-08-22 23:05:14,314 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 23:05:14,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:05:14,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 23:05:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-08-22 23:05:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 23:05:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 23:05:14,324 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-08-22 23:05:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:14,325 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 23:05:14,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 23:05:14,325 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 23:05:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 23:05:14,326 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:14,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:14,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:05:14,327 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:14,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:14,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1535220285, now seen corresponding path program 1 times [2020-08-22 23:05:14,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:14,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214280123] [2020-08-22 23:05:14,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:14,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214280123] [2020-08-22 23:05:14,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:14,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 23:05:14,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598540552] [2020-08-22 23:05:14,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:05:14,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:14,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:05:14,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:05:14,452 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-08-22 23:05:14,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:14,522 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-08-22 23:05:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 23:05:14,523 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-22 23:05:14,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:14,524 INFO L225 Difference]: With dead ends: 38 [2020-08-22 23:05:14,524 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 23:05:14,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:05:14,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 23:05:14,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-08-22 23:05:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 23:05:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 23:05:14,537 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2020-08-22 23:05:14,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:14,537 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 23:05:14,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:05:14,538 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 23:05:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 23:05:14,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:14,539 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:14,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:05:14,540 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:14,540 INFO L82 PathProgramCache]: Analyzing trace with hash 463086038, now seen corresponding path program 1 times [2020-08-22 23:05:14,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:14,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714567058] [2020-08-22 23:05:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:14,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714567058] [2020-08-22 23:05:14,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:14,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 23:05:14,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792885385] [2020-08-22 23:05:14,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:05:14,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:14,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:05:14,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:05:14,594 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-08-22 23:05:14,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:14,659 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-08-22 23:05:14,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 23:05:14,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-08-22 23:05:14,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:14,661 INFO L225 Difference]: With dead ends: 59 [2020-08-22 23:05:14,661 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 23:05:14,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:05:14,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 23:05:14,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-08-22 23:05:14,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 23:05:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 23:05:14,672 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2020-08-22 23:05:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:14,673 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 23:05:14,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:05:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 23:05:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 23:05:14,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:14,674 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:14,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:05:14,675 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:14,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:14,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1265709657, now seen corresponding path program 1 times [2020-08-22 23:05:14,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:14,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773277222] [2020-08-22 23:05:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:14,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773277222] [2020-08-22 23:05:14,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:14,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 23:05:14,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559633668] [2020-08-22 23:05:14,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 23:05:14,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:14,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 23:05:14,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:05:14,839 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-08-22 23:05:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:14,914 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 23:05:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 23:05:14,915 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-22 23:05:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:14,916 INFO L225 Difference]: With dead ends: 46 [2020-08-22 23:05:14,917 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 23:05:14,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:05:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 23:05:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-08-22 23:05:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 23:05:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 23:05:14,928 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2020-08-22 23:05:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:14,929 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 23:05:14,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 23:05:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 23:05:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 23:05:14,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:14,931 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:14,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:05:14,931 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:14,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:14,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1847206016, now seen corresponding path program 2 times [2020-08-22 23:05:14,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:14,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908418048] [2020-08-22 23:05:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:15,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908418048] [2020-08-22 23:05:15,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:15,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 23:05:15,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114068401] [2020-08-22 23:05:15,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:05:15,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:15,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:05:15,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:05:15,006 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 6 states. [2020-08-22 23:05:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:15,085 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-08-22 23:05:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 23:05:15,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-22 23:05:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:15,087 INFO L225 Difference]: With dead ends: 68 [2020-08-22 23:05:15,088 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 23:05:15,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:05:15,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 23:05:15,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-08-22 23:05:15,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 23:05:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 23:05:15,099 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33 [2020-08-22 23:05:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:15,102 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 23:05:15,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:05:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 23:05:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 23:05:15,104 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:15,104 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:15,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:05:15,104 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:15,105 INFO L82 PathProgramCache]: Analyzing trace with hash -34853245, now seen corresponding path program 2 times [2020-08-22 23:05:15,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:15,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108396030] [2020-08-22 23:05:15,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:15,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:15,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108396030] [2020-08-22 23:05:15,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:15,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 23:05:15,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603247893] [2020-08-22 23:05:15,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 23:05:15,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:15,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 23:05:15,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:05:15,200 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 8 states. [2020-08-22 23:05:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:15,296 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 23:05:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 23:05:15,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-08-22 23:05:15,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:15,298 INFO L225 Difference]: With dead ends: 55 [2020-08-22 23:05:15,298 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 23:05:15,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:05:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 23:05:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-08-22 23:05:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 23:05:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 23:05:15,309 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 35 [2020-08-22 23:05:15,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:15,309 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 23:05:15,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 23:05:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 23:05:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 23:05:15,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:15,311 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:15,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:05:15,312 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:15,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:15,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1854078698, now seen corresponding path program 3 times [2020-08-22 23:05:15,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:15,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211923505] [2020-08-22 23:05:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:15,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:15,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211923505] [2020-08-22 23:05:15,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:15,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 23:05:15,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255985185] [2020-08-22 23:05:15,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 23:05:15,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:15,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 23:05:15,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:05:15,377 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 7 states. [2020-08-22 23:05:15,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:15,468 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-08-22 23:05:15,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 23:05:15,468 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-08-22 23:05:15,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:15,470 INFO L225 Difference]: With dead ends: 77 [2020-08-22 23:05:15,470 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 23:05:15,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:05:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 23:05:15,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2020-08-22 23:05:15,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 23:05:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 23:05:15,480 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 42 [2020-08-22 23:05:15,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:15,481 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 23:05:15,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 23:05:15,481 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 23:05:15,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 23:05:15,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:15,483 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:15,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 23:05:15,483 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:15,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:15,484 INFO L82 PathProgramCache]: Analyzing trace with hash -736542311, now seen corresponding path program 3 times [2020-08-22 23:05:15,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:15,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910629606] [2020-08-22 23:05:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:15,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:15,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910629606] [2020-08-22 23:05:15,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:15,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 23:05:15,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822624428] [2020-08-22 23:05:15,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 23:05:15,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:15,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 23:05:15,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:05:15,606 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 11 states. [2020-08-22 23:05:15,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:15,765 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 23:05:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 23:05:15,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-08-22 23:05:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:15,767 INFO L225 Difference]: With dead ends: 64 [2020-08-22 23:05:15,767 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 23:05:15,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-08-22 23:05:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 23:05:15,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-22 23:05:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 23:05:15,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 23:05:15,780 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2020-08-22 23:05:15,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:15,781 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 23:05:15,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 23:05:15,781 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 23:05:15,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 23:05:15,782 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:15,782 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:15,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 23:05:15,783 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:15,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 4 times [2020-08-22 23:05:15,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:15,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609770537] [2020-08-22 23:05:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:15,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:15,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609770537] [2020-08-22 23:05:15,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:15,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 23:05:15,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466383854] [2020-08-22 23:05:15,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 23:05:15,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:15,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 23:05:15,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:05:15,857 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 8 states. [2020-08-22 23:05:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:15,971 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-08-22 23:05:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 23:05:15,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-22 23:05:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:15,973 INFO L225 Difference]: With dead ends: 86 [2020-08-22 23:05:15,973 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 23:05:15,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:05:15,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 23:05:15,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-08-22 23:05:15,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 23:05:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 23:05:15,997 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 51 [2020-08-22 23:05:15,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:15,997 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 23:05:15,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 23:05:15,998 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 23:05:16,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 23:05:16,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:16,002 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:16,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 23:05:16,002 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:16,005 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 4 times [2020-08-22 23:05:16,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:16,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65780700] [2020-08-22 23:05:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:16,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:16,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65780700] [2020-08-22 23:05:16,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:16,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 23:05:16,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149707049] [2020-08-22 23:05:16,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 23:05:16,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:16,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 23:05:16,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:05:16,167 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 13 states. [2020-08-22 23:05:16,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:16,332 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-22 23:05:16,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 23:05:16,333 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-08-22 23:05:16,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:16,334 INFO L225 Difference]: With dead ends: 73 [2020-08-22 23:05:16,334 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 23:05:16,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:05:16,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 23:05:16,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-08-22 23:05:16,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 23:05:16,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 23:05:16,345 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 53 [2020-08-22 23:05:16,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:16,346 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 23:05:16,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 23:05:16,346 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 23:05:16,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 23:05:16,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:16,347 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:16,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 23:05:16,347 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:16,348 INFO L82 PathProgramCache]: Analyzing trace with hash -392261546, now seen corresponding path program 5 times [2020-08-22 23:05:16,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:16,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307488775] [2020-08-22 23:05:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:16,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:16,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307488775] [2020-08-22 23:05:16,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:16,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 23:05:16,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782533304] [2020-08-22 23:05:16,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:05:16,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:05:16,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:05:16,426 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 9 states. [2020-08-22 23:05:16,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:16,539 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-08-22 23:05:16,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 23:05:16,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-08-22 23:05:16,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:16,540 INFO L225 Difference]: With dead ends: 95 [2020-08-22 23:05:16,540 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 23:05:16,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:05:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 23:05:16,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-08-22 23:05:16,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 23:05:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-22 23:05:16,552 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2020-08-22 23:05:16,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:16,553 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-22 23:05:16,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:05:16,553 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-22 23:05:16,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 23:05:16,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:16,554 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:16,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 23:05:16,554 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:16,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:16,555 INFO L82 PathProgramCache]: Analyzing trace with hash -384565031, now seen corresponding path program 5 times [2020-08-22 23:05:16,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:16,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714632364] [2020-08-22 23:05:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:16,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:16,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714632364] [2020-08-22 23:05:16,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:16,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 23:05:16,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486258609] [2020-08-22 23:05:16,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 23:05:16,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:16,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 23:05:16,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:05:16,720 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 15 states. [2020-08-22 23:05:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:16,949 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-22 23:05:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 23:05:16,950 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-08-22 23:05:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:16,951 INFO L225 Difference]: With dead ends: 82 [2020-08-22 23:05:16,951 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 23:05:16,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-08-22 23:05:16,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 23:05:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-08-22 23:05:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 23:05:16,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-22 23:05:16,965 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 62 [2020-08-22 23:05:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:16,966 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-22 23:05:16,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 23:05:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-22 23:05:16,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 23:05:16,967 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:16,967 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:16,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 23:05:16,967 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:16,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:16,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1192623616, now seen corresponding path program 6 times [2020-08-22 23:05:16,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:16,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740775132] [2020-08-22 23:05:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:17,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 6 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:17,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740775132] [2020-08-22 23:05:17,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:17,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 23:05:17,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624801194] [2020-08-22 23:05:17,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 23:05:17,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:17,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 23:05:17,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:05:17,053 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 10 states. [2020-08-22 23:05:17,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:17,177 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-08-22 23:05:17,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 23:05:17,178 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-22 23:05:17,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:17,179 INFO L225 Difference]: With dead ends: 104 [2020-08-22 23:05:17,179 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 23:05:17,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-08-22 23:05:17,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 23:05:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-08-22 23:05:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 23:05:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-22 23:05:17,192 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 69 [2020-08-22 23:05:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:17,192 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-22 23:05:17,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 23:05:17,192 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-22 23:05:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 23:05:17,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:17,193 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:17,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 23:05:17,194 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:17,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:17,194 INFO L82 PathProgramCache]: Analyzing trace with hash -733368317, now seen corresponding path program 6 times [2020-08-22 23:05:17,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:17,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131812765] [2020-08-22 23:05:17,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:17,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:17,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131812765] [2020-08-22 23:05:17,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:17,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 23:05:17,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757397599] [2020-08-22 23:05:17,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 23:05:17,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:17,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 23:05:17,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-22 23:05:17,434 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2020-08-22 23:05:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:17,725 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-22 23:05:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 23:05:17,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-08-22 23:05:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:17,727 INFO L225 Difference]: With dead ends: 91 [2020-08-22 23:05:17,727 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 23:05:17,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:05:17,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 23:05:17,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-08-22 23:05:17,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 23:05:17,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-22 23:05:17,743 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 71 [2020-08-22 23:05:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:17,743 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-22 23:05:17,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 23:05:17,744 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-22 23:05:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 23:05:17,750 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:17,750 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:17,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 23:05:17,751 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:17,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:17,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1330458730, now seen corresponding path program 7 times [2020-08-22 23:05:17,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:17,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661726735] [2020-08-22 23:05:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:17,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 7 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:17,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661726735] [2020-08-22 23:05:17,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:17,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 23:05:17,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855547268] [2020-08-22 23:05:17,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 23:05:17,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:17,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 23:05:17,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:05:17,861 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 11 states. [2020-08-22 23:05:18,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:18,001 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-08-22 23:05:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 23:05:18,002 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-08-22 23:05:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:18,003 INFO L225 Difference]: With dead ends: 113 [2020-08-22 23:05:18,003 INFO L226 Difference]: Without dead ends: 97 [2020-08-22 23:05:18,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:05:18,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-08-22 23:05:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-08-22 23:05:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 23:05:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-22 23:05:18,015 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 78 [2020-08-22 23:05:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:18,015 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-22 23:05:18,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 23:05:18,016 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-22 23:05:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 23:05:18,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:18,016 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:18,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 23:05:18,017 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:18,017 INFO L82 PathProgramCache]: Analyzing trace with hash -48926695, now seen corresponding path program 7 times [2020-08-22 23:05:18,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:18,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131038439] [2020-08-22 23:05:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:18,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131038439] [2020-08-22 23:05:18,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:18,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 23:05:18,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879661250] [2020-08-22 23:05:18,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 23:05:18,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:18,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 23:05:18,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:05:18,267 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 19 states. [2020-08-22 23:05:18,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:18,702 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-08-22 23:05:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 23:05:18,703 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2020-08-22 23:05:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:18,704 INFO L225 Difference]: With dead ends: 100 [2020-08-22 23:05:18,704 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 23:05:18,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2020-08-22 23:05:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 23:05:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2020-08-22 23:05:18,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 23:05:18,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-22 23:05:18,717 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 80 [2020-08-22 23:05:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:18,717 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-22 23:05:18,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 23:05:18,718 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-22 23:05:18,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 23:05:18,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:18,719 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:18,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 23:05:18,719 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:18,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:18,720 INFO L82 PathProgramCache]: Analyzing trace with hash -326571328, now seen corresponding path program 8 times [2020-08-22 23:05:18,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:18,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014681551] [2020-08-22 23:05:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:18,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014681551] [2020-08-22 23:05:18,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:18,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 23:05:18,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245925898] [2020-08-22 23:05:18,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 23:05:18,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:18,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 23:05:18,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:05:18,812 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 12 states. [2020-08-22 23:05:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:18,966 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-08-22 23:05:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 23:05:18,967 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-08-22 23:05:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:18,968 INFO L225 Difference]: With dead ends: 122 [2020-08-22 23:05:18,968 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 23:05:18,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-08-22 23:05:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 23:05:18,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2020-08-22 23:05:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 23:05:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-08-22 23:05:18,981 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 87 [2020-08-22 23:05:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:18,981 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-08-22 23:05:18,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 23:05:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-08-22 23:05:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 23:05:18,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:18,982 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:18,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 23:05:18,983 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:18,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:18,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1680774973, now seen corresponding path program 8 times [2020-08-22 23:05:18,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:18,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312175369] [2020-08-22 23:05:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:19,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:19,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312175369] [2020-08-22 23:05:19,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:19,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 23:05:19,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768481574] [2020-08-22 23:05:19,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 23:05:19,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:19,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 23:05:19,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-08-22 23:05:19,239 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2020-08-22 23:05:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:19,647 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2020-08-22 23:05:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 23:05:19,648 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-08-22 23:05:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:19,649 INFO L225 Difference]: With dead ends: 109 [2020-08-22 23:05:19,649 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 23:05:19,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 23:05:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 23:05:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-08-22 23:05:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 23:05:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-08-22 23:05:19,662 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 89 [2020-08-22 23:05:19,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:19,663 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-08-22 23:05:19,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 23:05:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-08-22 23:05:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 23:05:19,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:19,664 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:19,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 23:05:19,665 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:19,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:19,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1953349334, now seen corresponding path program 9 times [2020-08-22 23:05:19,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:19,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712665877] [2020-08-22 23:05:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:19,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 9 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:19,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712665877] [2020-08-22 23:05:19,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:19,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 23:05:19,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387855734] [2020-08-22 23:05:19,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 23:05:19,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:19,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 23:05:19,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:05:19,780 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 13 states. [2020-08-22 23:05:20,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:20,039 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2020-08-22 23:05:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 23:05:20,040 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-08-22 23:05:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:20,042 INFO L225 Difference]: With dead ends: 131 [2020-08-22 23:05:20,042 INFO L226 Difference]: Without dead ends: 115 [2020-08-22 23:05:20,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-08-22 23:05:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-22 23:05:20,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2020-08-22 23:05:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 23:05:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-08-22 23:05:20,063 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 96 [2020-08-22 23:05:20,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:20,063 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-08-22 23:05:20,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 23:05:20,064 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-08-22 23:05:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 23:05:20,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:20,065 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:20,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 23:05:20,065 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:20,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1110339751, now seen corresponding path program 9 times [2020-08-22 23:05:20,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:20,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254182407] [2020-08-22 23:05:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:20,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254182407] [2020-08-22 23:05:20,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:20,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 23:05:20,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945538150] [2020-08-22 23:05:20,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 23:05:20,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:20,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 23:05:20,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-08-22 23:05:20,457 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 23 states. [2020-08-22 23:05:20,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:20,945 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2020-08-22 23:05:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 23:05:20,945 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 98 [2020-08-22 23:05:20,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:20,946 INFO L225 Difference]: With dead ends: 118 [2020-08-22 23:05:20,946 INFO L226 Difference]: Without dead ends: 111 [2020-08-22 23:05:20,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 23:05:20,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-22 23:05:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-08-22 23:05:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-22 23:05:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-08-22 23:05:20,961 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 98 [2020-08-22 23:05:20,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:20,962 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-08-22 23:05:20,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 23:05:20,962 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-08-22 23:05:20,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-22 23:05:20,963 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:20,963 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:20,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 23:05:20,964 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:20,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:20,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1560748928, now seen corresponding path program 10 times [2020-08-22 23:05:20,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:20,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961030361] [2020-08-22 23:05:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:21,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 10 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:21,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961030361] [2020-08-22 23:05:21,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:21,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 23:05:21,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532184889] [2020-08-22 23:05:21,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 23:05:21,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:21,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 23:05:21,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-22 23:05:21,119 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 14 states. [2020-08-22 23:05:21,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:21,384 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2020-08-22 23:05:21,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 23:05:21,386 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-08-22 23:05:21,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:21,388 INFO L225 Difference]: With dead ends: 140 [2020-08-22 23:05:21,388 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 23:05:21,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-08-22 23:05:21,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 23:05:21,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2020-08-22 23:05:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 23:05:21,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-08-22 23:05:21,416 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 105 [2020-08-22 23:05:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:21,417 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-08-22 23:05:21,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 23:05:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-08-22 23:05:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-22 23:05:21,419 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:21,420 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:21,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 23:05:21,420 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:21,421 INFO L82 PathProgramCache]: Analyzing trace with hash -442207869, now seen corresponding path program 10 times [2020-08-22 23:05:21,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:21,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911811755] [2020-08-22 23:05:21,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:21,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:21,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911811755] [2020-08-22 23:05:21,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:21,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 23:05:21,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408570801] [2020-08-22 23:05:21,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 23:05:21,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:21,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 23:05:21,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-22 23:05:21,945 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 25 states. [2020-08-22 23:05:22,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:22,617 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2020-08-22 23:05:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 23:05:22,618 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 107 [2020-08-22 23:05:22,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:22,619 INFO L225 Difference]: With dead ends: 127 [2020-08-22 23:05:22,619 INFO L226 Difference]: Without dead ends: 120 [2020-08-22 23:05:22,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 23:05:22,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-22 23:05:22,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-08-22 23:05:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-22 23:05:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-08-22 23:05:22,637 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 107 [2020-08-22 23:05:22,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:22,637 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-08-22 23:05:22,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 23:05:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-08-22 23:05:22,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-08-22 23:05:22,639 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:22,639 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:22,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 23:05:22,639 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:22,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:22,640 INFO L82 PathProgramCache]: Analyzing trace with hash -108831210, now seen corresponding path program 11 times [2020-08-22 23:05:22,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:22,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13148928] [2020-08-22 23:05:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:22,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 11 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:22,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13148928] [2020-08-22 23:05:22,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:22,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 23:05:22,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512904161] [2020-08-22 23:05:22,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 23:05:22,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:22,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 23:05:22,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:05:22,790 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 15 states. [2020-08-22 23:05:23,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:23,043 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2020-08-22 23:05:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 23:05:23,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 114 [2020-08-22 23:05:23,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:23,045 INFO L225 Difference]: With dead ends: 149 [2020-08-22 23:05:23,045 INFO L226 Difference]: Without dead ends: 133 [2020-08-22 23:05:23,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:05:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-22 23:05:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2020-08-22 23:05:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-22 23:05:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-08-22 23:05:23,064 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 114 [2020-08-22 23:05:23,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:23,064 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-08-22 23:05:23,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 23:05:23,064 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-08-22 23:05:23,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 23:05:23,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:23,065 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:23,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 23:05:23,066 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:23,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:23,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1409048217, now seen corresponding path program 11 times [2020-08-22 23:05:23,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:23,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738926650] [2020-08-22 23:05:23,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:23,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:23,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738926650] [2020-08-22 23:05:23,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:23,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 23:05:23,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388530545] [2020-08-22 23:05:23,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 23:05:23,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:23,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 23:05:23,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:05:23,508 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 27 states. [2020-08-22 23:05:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:24,227 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2020-08-22 23:05:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 23:05:24,228 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 116 [2020-08-22 23:05:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:24,229 INFO L225 Difference]: With dead ends: 136 [2020-08-22 23:05:24,229 INFO L226 Difference]: Without dead ends: 129 [2020-08-22 23:05:24,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=2000, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 23:05:24,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-22 23:05:24,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2020-08-22 23:05:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-22 23:05:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2020-08-22 23:05:24,247 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 116 [2020-08-22 23:05:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:24,247 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2020-08-22 23:05:24,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 23:05:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2020-08-22 23:05:24,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 23:05:24,249 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:24,249 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:24,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 23:05:24,249 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:24,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:24,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1865460800, now seen corresponding path program 12 times [2020-08-22 23:05:24,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:24,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728083134] [2020-08-22 23:05:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:24,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 12 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:24,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728083134] [2020-08-22 23:05:24,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:24,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 23:05:24,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41091568] [2020-08-22 23:05:24,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 23:05:24,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:24,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 23:05:24,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-22 23:05:24,432 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 16 states. [2020-08-22 23:05:24,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:24,678 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-08-22 23:05:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 23:05:24,679 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2020-08-22 23:05:24,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:24,680 INFO L225 Difference]: With dead ends: 158 [2020-08-22 23:05:24,680 INFO L226 Difference]: Without dead ends: 142 [2020-08-22 23:05:24,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-08-22 23:05:24,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-22 23:05:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 132. [2020-08-22 23:05:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 23:05:24,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2020-08-22 23:05:24,701 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 123 [2020-08-22 23:05:24,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:24,701 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2020-08-22 23:05:24,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 23:05:24,701 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2020-08-22 23:05:24,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-22 23:05:24,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:24,703 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:24,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 23:05:24,703 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:24,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:24,704 INFO L82 PathProgramCache]: Analyzing trace with hash 328124995, now seen corresponding path program 12 times [2020-08-22 23:05:24,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:24,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38395492] [2020-08-22 23:05:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:25,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:25,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38395492] [2020-08-22 23:05:25,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:25,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 23:05:25,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104528140] [2020-08-22 23:05:25,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 23:05:25,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:25,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 23:05:25,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2020-08-22 23:05:25,249 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 29 states. [2020-08-22 23:05:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:26,043 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2020-08-22 23:05:26,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 23:05:26,043 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 125 [2020-08-22 23:05:26,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:26,045 INFO L225 Difference]: With dead ends: 145 [2020-08-22 23:05:26,045 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 23:05:26,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=2373, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 23:05:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 23:05:26,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-08-22 23:05:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-08-22 23:05:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2020-08-22 23:05:26,065 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 125 [2020-08-22 23:05:26,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:26,066 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2020-08-22 23:05:26,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 23:05:26,066 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2020-08-22 23:05:26,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-22 23:05:26,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:26,068 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:26,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 23:05:26,068 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:26,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2136494762, now seen corresponding path program 13 times [2020-08-22 23:05:26,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:26,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449250468] [2020-08-22 23:05:26,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 13 proven. 728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:26,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449250468] [2020-08-22 23:05:26,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:26,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 23:05:26,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223861234] [2020-08-22 23:05:26,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 23:05:26,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:26,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 23:05:26,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-22 23:05:26,258 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 17 states. [2020-08-22 23:05:26,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:26,554 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2020-08-22 23:05:26,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 23:05:26,554 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 132 [2020-08-22 23:05:26,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:26,555 INFO L225 Difference]: With dead ends: 167 [2020-08-22 23:05:26,556 INFO L226 Difference]: Without dead ends: 151 [2020-08-22 23:05:26,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-08-22 23:05:26,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-22 23:05:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2020-08-22 23:05:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-08-22 23:05:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-08-22 23:05:26,577 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 132 [2020-08-22 23:05:26,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:26,578 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-08-22 23:05:26,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 23:05:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-08-22 23:05:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-22 23:05:26,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:26,579 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:26,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 23:05:26,580 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:26,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1555440167, now seen corresponding path program 13 times [2020-08-22 23:05:26,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:26,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740826512] [2020-08-22 23:05:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:27,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:27,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740826512] [2020-08-22 23:05:27,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:27,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 23:05:27,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472964356] [2020-08-22 23:05:27,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 23:05:27,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:27,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 23:05:27,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2020-08-22 23:05:27,105 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 31 states. [2020-08-22 23:05:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:27,978 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2020-08-22 23:05:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 23:05:27,979 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 134 [2020-08-22 23:05:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:27,980 INFO L225 Difference]: With dead ends: 154 [2020-08-22 23:05:27,980 INFO L226 Difference]: Without dead ends: 147 [2020-08-22 23:05:27,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=2778, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 23:05:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-08-22 23:05:28,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2020-08-22 23:05:28,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 23:05:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-08-22 23:05:28,006 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 134 [2020-08-22 23:05:28,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:28,007 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-08-22 23:05:28,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 23:05:28,007 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-08-22 23:05:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-22 23:05:28,008 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:28,008 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:28,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 23:05:28,009 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:28,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:28,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1825670400, now seen corresponding path program 14 times [2020-08-22 23:05:28,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:28,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036305226] [2020-08-22 23:05:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 14 proven. 847 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:28,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036305226] [2020-08-22 23:05:28,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:28,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 23:05:28,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461764041] [2020-08-22 23:05:28,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 23:05:28,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:28,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 23:05:28,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-22 23:05:28,233 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 18 states. [2020-08-22 23:05:28,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:28,575 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2020-08-22 23:05:28,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 23:05:28,575 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2020-08-22 23:05:28,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:28,576 INFO L225 Difference]: With dead ends: 176 [2020-08-22 23:05:28,577 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 23:05:28,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 23:05:28,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 23:05:28,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2020-08-22 23:05:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-22 23:05:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2020-08-22 23:05:28,598 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 141 [2020-08-22 23:05:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:28,598 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2020-08-22 23:05:28,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 23:05:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2020-08-22 23:05:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-22 23:05:28,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:28,600 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:28,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 23:05:28,600 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:28,600 INFO L82 PathProgramCache]: Analyzing trace with hash 744256259, now seen corresponding path program 14 times [2020-08-22 23:05:28,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:28,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11947870] [2020-08-22 23:05:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:29,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 0 proven. 889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:29,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11947870] [2020-08-22 23:05:29,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:29,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 23:05:29,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937658231] [2020-08-22 23:05:29,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 23:05:29,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:29,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 23:05:29,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 23:05:29,180 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 33 states. [2020-08-22 23:05:30,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:30,205 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2020-08-22 23:05:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 23:05:30,206 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 143 [2020-08-22 23:05:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:30,208 INFO L225 Difference]: With dead ends: 163 [2020-08-22 23:05:30,208 INFO L226 Difference]: Without dead ends: 156 [2020-08-22 23:05:30,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=207, Invalid=3215, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 23:05:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-08-22 23:05:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-08-22 23:05:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-08-22 23:05:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-08-22 23:05:30,233 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 143 [2020-08-22 23:05:30,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:30,233 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-08-22 23:05:30,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 23:05:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-08-22 23:05:30,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-22 23:05:30,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:30,234 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:30,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 23:05:30,235 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:30,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:30,235 INFO L82 PathProgramCache]: Analyzing trace with hash 93236374, now seen corresponding path program 15 times [2020-08-22 23:05:30,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:30,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721581363] [2020-08-22 23:05:30,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:30,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 15 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:30,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721581363] [2020-08-22 23:05:30,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:30,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 23:05:30,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474322284] [2020-08-22 23:05:30,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 23:05:30,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:30,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 23:05:30,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:05:30,468 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 19 states. [2020-08-22 23:05:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:30,812 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2020-08-22 23:05:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 23:05:30,817 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 150 [2020-08-22 23:05:30,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:30,818 INFO L225 Difference]: With dead ends: 185 [2020-08-22 23:05:30,819 INFO L226 Difference]: Without dead ends: 169 [2020-08-22 23:05:30,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 23:05:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-22 23:05:30,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2020-08-22 23:05:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-08-22 23:05:30,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2020-08-22 23:05:30,857 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 150 [2020-08-22 23:05:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:30,857 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2020-08-22 23:05:30,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 23:05:30,858 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2020-08-22 23:05:30,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-22 23:05:30,858 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:30,859 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:30,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 23:05:30,859 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:30,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:30,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1972499175, now seen corresponding path program 15 times [2020-08-22 23:05:30,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:30,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182219056] [2020-08-22 23:05:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:31,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182219056] [2020-08-22 23:05:31,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:31,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-22 23:05:31,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345507884] [2020-08-22 23:05:31,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 23:05:31,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:31,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 23:05:31,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 23:05:31,548 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 35 states. [2020-08-22 23:05:32,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:32,699 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2020-08-22 23:05:32,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 23:05:32,700 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 152 [2020-08-22 23:05:32,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:32,702 INFO L225 Difference]: With dead ends: 172 [2020-08-22 23:05:32,702 INFO L226 Difference]: Without dead ends: 165 [2020-08-22 23:05:32,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=3684, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 23:05:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-08-22 23:05:32,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-08-22 23:05:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 23:05:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-08-22 23:05:32,729 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 152 [2020-08-22 23:05:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:32,729 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-08-22 23:05:32,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 23:05:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-08-22 23:05:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-22 23:05:32,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:32,731 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:32,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 23:05:32,731 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:32,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1152757184, now seen corresponding path program 16 times [2020-08-22 23:05:32,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:32,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69164681] [2020-08-22 23:05:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:32,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 16 proven. 1112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:32,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69164681] [2020-08-22 23:05:32,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:32,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 23:05:32,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986743778] [2020-08-22 23:05:32,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 23:05:32,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:32,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 23:05:32,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:05:32,961 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 20 states. [2020-08-22 23:05:33,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:33,338 INFO L93 Difference]: Finished difference Result 194 states and 198 transitions. [2020-08-22 23:05:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 23:05:33,338 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 159 [2020-08-22 23:05:33,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:33,340 INFO L225 Difference]: With dead ends: 194 [2020-08-22 23:05:33,340 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 23:05:33,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 23:05:33,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 23:05:33,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2020-08-22 23:05:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 23:05:33,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2020-08-22 23:05:33,384 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 159 [2020-08-22 23:05:33,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:33,384 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2020-08-22 23:05:33,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 23:05:33,385 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2020-08-22 23:05:33,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-08-22 23:05:33,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:33,386 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:33,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 23:05:33,387 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:33,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:33,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1680249917, now seen corresponding path program 16 times [2020-08-22 23:05:33,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:33,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524937736] [2020-08-22 23:05:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:34,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 1160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:34,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524937736] [2020-08-22 23:05:34,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:34,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 23:05:34,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261797163] [2020-08-22 23:05:34,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 23:05:34,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:34,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 23:05:34,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 23:05:34,206 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 37 states. [2020-08-22 23:05:35,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:35,436 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2020-08-22 23:05:35,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 23:05:35,437 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 161 [2020-08-22 23:05:35,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:35,438 INFO L225 Difference]: With dead ends: 181 [2020-08-22 23:05:35,438 INFO L226 Difference]: Without dead ends: 174 [2020-08-22 23:05:35,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=237, Invalid=4185, Unknown=0, NotChecked=0, Total=4422 [2020-08-22 23:05:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-22 23:05:35,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-08-22 23:05:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-08-22 23:05:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2020-08-22 23:05:35,470 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 161 [2020-08-22 23:05:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:35,471 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2020-08-22 23:05:35,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 23:05:35,471 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2020-08-22 23:05:35,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-22 23:05:35,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:35,472 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:35,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 23:05:35,472 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:35,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:35,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2129419222, now seen corresponding path program 17 times [2020-08-22 23:05:35,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:35,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622749592] [2020-08-22 23:05:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:35,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 17 proven. 1258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:35,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622749592] [2020-08-22 23:05:35,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:35,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 23:05:35,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905020312] [2020-08-22 23:05:35,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 23:05:35,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:35,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 23:05:35,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-22 23:05:35,741 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 21 states. [2020-08-22 23:05:36,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:36,138 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2020-08-22 23:05:36,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 23:05:36,139 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 168 [2020-08-22 23:05:36,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:36,140 INFO L225 Difference]: With dead ends: 203 [2020-08-22 23:05:36,140 INFO L226 Difference]: Without dead ends: 187 [2020-08-22 23:05:36,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 23:05:36,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-22 23:05:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2020-08-22 23:05:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-22 23:05:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-08-22 23:05:36,161 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 168 [2020-08-22 23:05:36,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:36,162 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-08-22 23:05:36,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 23:05:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-08-22 23:05:36,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-08-22 23:05:36,163 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:36,163 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:36,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 23:05:36,163 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:36,164 INFO L82 PathProgramCache]: Analyzing trace with hash 589098073, now seen corresponding path program 17 times [2020-08-22 23:05:36,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:36,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969787050] [2020-08-22 23:05:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:36,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 0 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:36,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969787050] [2020-08-22 23:05:36,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:36,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-22 23:05:36,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677863029] [2020-08-22 23:05:36,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 23:05:36,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:36,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 23:05:36,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1390, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 23:05:36,986 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 39 states. [2020-08-22 23:05:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:38,341 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2020-08-22 23:05:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 23:05:38,342 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 170 [2020-08-22 23:05:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:38,343 INFO L225 Difference]: With dead ends: 190 [2020-08-22 23:05:38,343 INFO L226 Difference]: Without dead ends: 183 [2020-08-22 23:05:38,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=252, Invalid=4718, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 23:05:38,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-08-22 23:05:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2020-08-22 23:05:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-22 23:05:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2020-08-22 23:05:38,371 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 170 [2020-08-22 23:05:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:38,372 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2020-08-22 23:05:38,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 23:05:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2020-08-22 23:05:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-22 23:05:38,373 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:38,373 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:38,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 23:05:38,373 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1252599424, now seen corresponding path program 18 times [2020-08-22 23:05:38,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:38,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613690045] [2020-08-22 23:05:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:38,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 18 proven. 1413 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:38,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613690045] [2020-08-22 23:05:38,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:38,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 23:05:38,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419767587] [2020-08-22 23:05:38,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 23:05:38,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:38,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 23:05:38,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-22 23:05:38,676 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 22 states. [2020-08-22 23:05:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:39,124 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2020-08-22 23:05:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 23:05:39,125 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 177 [2020-08-22 23:05:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:39,126 INFO L225 Difference]: With dead ends: 212 [2020-08-22 23:05:39,126 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 23:05:39,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 23:05:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 23:05:39,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 186. [2020-08-22 23:05:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 23:05:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2020-08-22 23:05:39,151 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 177 [2020-08-22 23:05:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:39,151 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2020-08-22 23:05:39,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 23:05:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2020-08-22 23:05:39,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-08-22 23:05:39,152 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:39,152 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:39,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 23:05:39,153 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:39,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:39,153 INFO L82 PathProgramCache]: Analyzing trace with hash -221137789, now seen corresponding path program 18 times [2020-08-22 23:05:39,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:39,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983782804] [2020-08-22 23:05:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:39,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 0 proven. 1467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:40,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983782804] [2020-08-22 23:05:40,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:40,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 23:05:40,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881627720] [2020-08-22 23:05:40,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 23:05:40,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:40,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 23:05:40,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1543, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 23:05:40,026 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 41 states. [2020-08-22 23:05:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:41,599 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2020-08-22 23:05:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 23:05:41,600 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 179 [2020-08-22 23:05:41,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:41,602 INFO L225 Difference]: With dead ends: 199 [2020-08-22 23:05:41,602 INFO L226 Difference]: Without dead ends: 192 [2020-08-22 23:05:41,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=267, Invalid=5283, Unknown=0, NotChecked=0, Total=5550 [2020-08-22 23:05:41,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-08-22 23:05:41,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2020-08-22 23:05:41,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-08-22 23:05:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2020-08-22 23:05:41,632 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 179 [2020-08-22 23:05:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:41,633 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2020-08-22 23:05:41,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 23:05:41,633 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2020-08-22 23:05:41,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-08-22 23:05:41,633 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:41,634 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:41,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 23:05:41,634 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:41,634 INFO L82 PathProgramCache]: Analyzing trace with hash 510966550, now seen corresponding path program 19 times [2020-08-22 23:05:41,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:41,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995844652] [2020-08-22 23:05:41,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:41,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 19 proven. 1577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:41,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995844652] [2020-08-22 23:05:41,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:41,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 23:05:41,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010269980] [2020-08-22 23:05:41,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 23:05:41,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:41,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 23:05:41,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-22 23:05:41,950 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 23 states. [2020-08-22 23:05:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:42,429 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2020-08-22 23:05:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 23:05:42,429 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 186 [2020-08-22 23:05:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:42,431 INFO L225 Difference]: With dead ends: 221 [2020-08-22 23:05:42,431 INFO L226 Difference]: Without dead ends: 205 [2020-08-22 23:05:42,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 23:05:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-22 23:05:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 195. [2020-08-22 23:05:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-08-22 23:05:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2020-08-22 23:05:42,459 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 186 [2020-08-22 23:05:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:42,459 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2020-08-22 23:05:42,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 23:05:42,459 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2020-08-22 23:05:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-08-22 23:05:42,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:42,461 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:42,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 23:05:42,461 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:42,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:42,461 INFO L82 PathProgramCache]: Analyzing trace with hash 34241433, now seen corresponding path program 19 times [2020-08-22 23:05:42,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:42,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268371670] [2020-08-22 23:05:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:43,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:43,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268371670] [2020-08-22 23:05:43,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:43,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-22 23:05:43,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257646658] [2020-08-22 23:05:43,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 23:05:43,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:43,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 23:05:43,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1704, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 23:05:43,443 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 43 states. [2020-08-22 23:05:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:45,171 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2020-08-22 23:05:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 23:05:45,171 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 188 [2020-08-22 23:05:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:45,173 INFO L225 Difference]: With dead ends: 208 [2020-08-22 23:05:45,173 INFO L226 Difference]: Without dead ends: 201 [2020-08-22 23:05:45,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=282, Invalid=5880, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 23:05:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-08-22 23:05:45,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-08-22 23:05:45,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-22 23:05:45,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2020-08-22 23:05:45,208 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 188 [2020-08-22 23:05:45,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:45,208 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2020-08-22 23:05:45,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 23:05:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2020-08-22 23:05:45,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-08-22 23:05:45,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:45,209 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:45,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 23:05:45,210 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:45,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:45,210 INFO L82 PathProgramCache]: Analyzing trace with hash -143134912, now seen corresponding path program 20 times [2020-08-22 23:05:45,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:45,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199058123] [2020-08-22 23:05:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:45,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 20 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:45,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199058123] [2020-08-22 23:05:45,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:45,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 23:05:45,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943887571] [2020-08-22 23:05:45,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 23:05:45,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:45,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 23:05:45,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-08-22 23:05:45,589 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 24 states. [2020-08-22 23:05:46,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:46,113 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2020-08-22 23:05:46,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-22 23:05:46,114 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 195 [2020-08-22 23:05:46,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:46,116 INFO L225 Difference]: With dead ends: 230 [2020-08-22 23:05:46,116 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 23:05:46,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 23:05:46,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 23:05:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 204. [2020-08-22 23:05:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 23:05:46,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-08-22 23:05:46,141 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 195 [2020-08-22 23:05:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:46,141 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-08-22 23:05:46,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 23:05:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-08-22 23:05:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-08-22 23:05:46,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:46,143 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:46,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 23:05:46,143 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:46,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:46,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1492038333, now seen corresponding path program 20 times [2020-08-22 23:05:46,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:46,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520989963] [2020-08-22 23:05:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:47,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 0 proven. 1810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:47,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520989963] [2020-08-22 23:05:47,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:47,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-22 23:05:47,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89343832] [2020-08-22 23:05:47,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-22 23:05:47,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:47,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-22 23:05:47,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1873, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 23:05:47,263 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 45 states. [2020-08-22 23:05:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:49,131 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2020-08-22 23:05:49,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-22 23:05:49,131 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 197 [2020-08-22 23:05:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:49,132 INFO L225 Difference]: With dead ends: 217 [2020-08-22 23:05:49,132 INFO L226 Difference]: Without dead ends: 210 [2020-08-22 23:05:49,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=297, Invalid=6509, Unknown=0, NotChecked=0, Total=6806 [2020-08-22 23:05:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-22 23:05:49,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-08-22 23:05:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-08-22 23:05:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2020-08-22 23:05:49,160 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 197 [2020-08-22 23:05:49,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:49,160 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2020-08-22 23:05:49,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-22 23:05:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2020-08-22 23:05:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-08-22 23:05:49,162 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:49,162 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:49,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 23:05:49,162 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:49,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:49,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1864644010, now seen corresponding path program 21 times [2020-08-22 23:05:49,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:49,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043703347] [2020-08-22 23:05:49,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 21 proven. 1932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:49,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043703347] [2020-08-22 23:05:49,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:49,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 23:05:49,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59194629] [2020-08-22 23:05:49,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 23:05:49,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:49,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 23:05:49,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-08-22 23:05:49,564 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 25 states. [2020-08-22 23:05:50,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:50,125 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2020-08-22 23:05:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 23:05:50,125 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 204 [2020-08-22 23:05:50,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:50,127 INFO L225 Difference]: With dead ends: 239 [2020-08-22 23:05:50,127 INFO L226 Difference]: Without dead ends: 223 [2020-08-22 23:05:50,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 23:05:50,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-22 23:05:50,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 213. [2020-08-22 23:05:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-08-22 23:05:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2020-08-22 23:05:50,159 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 204 [2020-08-22 23:05:50,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:50,159 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2020-08-22 23:05:50,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 23:05:50,159 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2020-08-22 23:05:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-08-22 23:05:50,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:50,160 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:50,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 23:05:50,160 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:50,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:50,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1995094745, now seen corresponding path program 21 times [2020-08-22 23:05:50,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:50,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717412810] [2020-08-22 23:05:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:51,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1995 backedges. 0 proven. 1995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:51,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717412810] [2020-08-22 23:05:51,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:51,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-22 23:05:51,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751119437] [2020-08-22 23:05:51,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-22 23:05:51,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:51,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-22 23:05:51,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2050, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 23:05:51,357 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand 47 states. [2020-08-22 23:05:53,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:53,398 INFO L93 Difference]: Finished difference Result 226 states and 227 transitions. [2020-08-22 23:05:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 23:05:53,398 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 206 [2020-08-22 23:05:53,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:53,400 INFO L225 Difference]: With dead ends: 226 [2020-08-22 23:05:53,400 INFO L226 Difference]: Without dead ends: 219 [2020-08-22 23:05:53,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=312, Invalid=7170, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 23:05:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-22 23:05:53,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2020-08-22 23:05:53,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-22 23:05:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2020-08-22 23:05:53,437 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 206 [2020-08-22 23:05:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:53,437 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2020-08-22 23:05:53,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-22 23:05:53,437 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2020-08-22 23:05:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-08-22 23:05:53,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:53,438 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:53,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 23:05:53,438 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:53,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1460795392, now seen corresponding path program 22 times [2020-08-22 23:05:53,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:53,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126128210] [2020-08-22 23:05:53,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:53,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 22 proven. 2123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:53,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126128210] [2020-08-22 23:05:53,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:53,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 23:05:53,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193185510] [2020-08-22 23:05:53,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 23:05:53,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:53,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 23:05:53,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-08-22 23:05:53,840 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 26 states. [2020-08-22 23:05:54,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:54,443 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2020-08-22 23:05:54,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 23:05:54,443 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 213 [2020-08-22 23:05:54,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:54,445 INFO L225 Difference]: With dead ends: 248 [2020-08-22 23:05:54,445 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 23:05:54,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 23:05:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 23:05:54,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2020-08-22 23:05:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-08-22 23:05:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2020-08-22 23:05:54,489 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 213 [2020-08-22 23:05:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:54,490 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2020-08-22 23:05:54,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 23:05:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2020-08-22 23:05:54,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-08-22 23:05:54,491 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:54,491 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:54,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 23:05:54,492 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:54,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:54,492 INFO L82 PathProgramCache]: Analyzing trace with hash -748407293, now seen corresponding path program 22 times [2020-08-22 23:05:54,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:54,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281335539] [2020-08-22 23:05:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:55,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 0 proven. 2189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:55,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281335539] [2020-08-22 23:05:55,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:55,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-22 23:05:55,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192839871] [2020-08-22 23:05:55,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-22 23:05:55,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:55,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-22 23:05:55,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2235, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 23:05:55,821 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 49 states. [2020-08-22 23:05:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:58,149 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2020-08-22 23:05:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 23:05:58,149 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 215 [2020-08-22 23:05:58,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:58,151 INFO L225 Difference]: With dead ends: 235 [2020-08-22 23:05:58,151 INFO L226 Difference]: Without dead ends: 228 [2020-08-22 23:05:58,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=327, Invalid=7863, Unknown=0, NotChecked=0, Total=8190 [2020-08-22 23:05:58,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-08-22 23:05:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2020-08-22 23:05:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-08-22 23:05:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2020-08-22 23:05:58,186 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 215 [2020-08-22 23:05:58,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:58,186 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2020-08-22 23:05:58,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-22 23:05:58,186 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2020-08-22 23:05:58,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-08-22 23:05:58,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:58,187 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:58,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 23:05:58,188 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:58,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1037404566, now seen corresponding path program 23 times [2020-08-22 23:05:58,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:58,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884570774] [2020-08-22 23:05:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:58,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 23 proven. 2323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:58,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884570774] [2020-08-22 23:05:58,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:58,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 23:05:58,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334572806] [2020-08-22 23:05:58,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 23:05:58,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:58,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 23:05:58,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:05:58,640 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 27 states. [2020-08-22 23:05:59,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:59,310 INFO L93 Difference]: Finished difference Result 257 states and 261 transitions. [2020-08-22 23:05:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-22 23:05:59,315 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 222 [2020-08-22 23:05:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:59,316 INFO L225 Difference]: With dead ends: 257 [2020-08-22 23:05:59,316 INFO L226 Difference]: Without dead ends: 241 [2020-08-22 23:05:59,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 23:05:59,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-22 23:05:59,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2020-08-22 23:05:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-22 23:05:59,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2020-08-22 23:05:59,360 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 222 [2020-08-22 23:05:59,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:59,361 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2020-08-22 23:05:59,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 23:05:59,361 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2020-08-22 23:05:59,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-08-22 23:05:59,362 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:59,362 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:59,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 23:05:59,362 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:59,362 INFO L82 PathProgramCache]: Analyzing trace with hash -864966119, now seen corresponding path program 23 times [2020-08-22 23:05:59,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:59,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86117631] [2020-08-22 23:05:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:00,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2392 backedges. 0 proven. 2392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:00,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86117631] [2020-08-22 23:06:00,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:00,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-22 23:06:00,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895766580] [2020-08-22 23:06:00,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-22 23:06:00,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:00,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-22 23:06:00,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2428, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 23:06:00,826 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 51 states. [2020-08-22 23:06:03,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:03,273 INFO L93 Difference]: Finished difference Result 244 states and 245 transitions. [2020-08-22 23:06:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-22 23:06:03,273 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 224 [2020-08-22 23:06:03,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:03,275 INFO L225 Difference]: With dead ends: 244 [2020-08-22 23:06:03,275 INFO L226 Difference]: Without dead ends: 237 [2020-08-22 23:06:03,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2338 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=342, Invalid=8588, Unknown=0, NotChecked=0, Total=8930 [2020-08-22 23:06:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-08-22 23:06:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-08-22 23:06:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-08-22 23:06:03,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-08-22 23:06:03,326 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 224 [2020-08-22 23:06:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:03,326 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-08-22 23:06:03,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-22 23:06:03,326 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-08-22 23:06:03,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-08-22 23:06:03,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:03,328 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:03,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 23:06:03,328 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:03,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:03,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1641509056, now seen corresponding path program 24 times [2020-08-22 23:06:03,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:03,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79168300] [2020-08-22 23:06:03,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:03,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 24 proven. 2532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:03,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79168300] [2020-08-22 23:06:03,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:03,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 23:06:03,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924078130] [2020-08-22 23:06:03,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 23:06:03,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:03,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 23:06:03,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-08-22 23:06:03,816 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 28 states. [2020-08-22 23:06:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:04,513 INFO L93 Difference]: Finished difference Result 266 states and 270 transitions. [2020-08-22 23:06:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-22 23:06:04,513 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 231 [2020-08-22 23:06:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:04,515 INFO L225 Difference]: With dead ends: 266 [2020-08-22 23:06:04,515 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 23:06:04,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 23:06:04,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 23:06:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2020-08-22 23:06:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-22 23:06:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2020-08-22 23:06:04,562 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 231 [2020-08-22 23:06:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:04,562 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2020-08-22 23:06:04,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 23:06:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2020-08-22 23:06:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-08-22 23:06:04,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:04,563 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:04,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 23:06:04,564 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:04,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:04,564 INFO L82 PathProgramCache]: Analyzing trace with hash -141136189, now seen corresponding path program 24 times [2020-08-22 23:06:04,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:04,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399294399] [2020-08-22 23:06:04,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:06,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2604 backedges. 0 proven. 2604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:06,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399294399] [2020-08-22 23:06:06,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:06,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-22 23:06:06,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073128822] [2020-08-22 23:06:06,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-22 23:06:06,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:06,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-22 23:06:06,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2629, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 23:06:06,253 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 53 states. [2020-08-22 23:06:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:08,955 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2020-08-22 23:06:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-22 23:06:08,956 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 233 [2020-08-22 23:06:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:08,958 INFO L225 Difference]: With dead ends: 253 [2020-08-22 23:06:08,958 INFO L226 Difference]: Without dead ends: 246 [2020-08-22 23:06:08,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=357, Invalid=9345, Unknown=0, NotChecked=0, Total=9702 [2020-08-22 23:06:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-08-22 23:06:09,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-08-22 23:06:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-08-22 23:06:09,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2020-08-22 23:06:09,003 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 233 [2020-08-22 23:06:09,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:09,003 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2020-08-22 23:06:09,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-22 23:06:09,004 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2020-08-22 23:06:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-08-22 23:06:09,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:09,005 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:09,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 23:06:09,006 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:09,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2011825962, now seen corresponding path program 25 times [2020-08-22 23:06:09,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:09,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644282893] [2020-08-22 23:06:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:09,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 25 proven. 2750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:09,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644282893] [2020-08-22 23:06:09,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:09,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 23:06:09,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262460549] [2020-08-22 23:06:09,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 23:06:09,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:09,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 23:06:09,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-08-22 23:06:09,537 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 29 states. [2020-08-22 23:06:10,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:10,313 INFO L93 Difference]: Finished difference Result 275 states and 279 transitions. [2020-08-22 23:06:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 23:06:10,314 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 240 [2020-08-22 23:06:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:10,316 INFO L225 Difference]: With dead ends: 275 [2020-08-22 23:06:10,316 INFO L226 Difference]: Without dead ends: 259 [2020-08-22 23:06:10,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 23:06:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-22 23:06:10,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 249. [2020-08-22 23:06:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-08-22 23:06:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2020-08-22 23:06:10,362 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 240 [2020-08-22 23:06:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:10,363 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2020-08-22 23:06:10,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 23:06:10,363 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2020-08-22 23:06:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-08-22 23:06:10,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:10,364 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:10,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 23:06:10,365 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:10,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:10,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2007807655, now seen corresponding path program 25 times [2020-08-22 23:06:10,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:10,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744017917] [2020-08-22 23:06:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:11,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2825 backedges. 0 proven. 2825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:12,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744017917] [2020-08-22 23:06:12,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:12,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-22 23:06:12,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060510697] [2020-08-22 23:06:12,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-22 23:06:12,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:12,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-22 23:06:12,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2838, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 23:06:12,038 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand 55 states. [2020-08-22 23:06:14,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:14,987 INFO L93 Difference]: Finished difference Result 262 states and 263 transitions. [2020-08-22 23:06:14,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 23:06:14,988 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 242 [2020-08-22 23:06:14,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:14,990 INFO L225 Difference]: With dead ends: 262 [2020-08-22 23:06:14,990 INFO L226 Difference]: Without dead ends: 255 [2020-08-22 23:06:14,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2790 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=372, Invalid=10134, Unknown=0, NotChecked=0, Total=10506 [2020-08-22 23:06:14,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-08-22 23:06:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2020-08-22 23:06:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-08-22 23:06:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2020-08-22 23:06:15,035 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 242 [2020-08-22 23:06:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:15,036 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2020-08-22 23:06:15,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-22 23:06:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2020-08-22 23:06:15,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-08-22 23:06:15,037 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:15,038 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:15,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 23:06:15,038 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:15,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:15,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1979700864, now seen corresponding path program 26 times [2020-08-22 23:06:15,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:15,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946280063] [2020-08-22 23:06:15,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:15,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 26 proven. 2977 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:15,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946280063] [2020-08-22 23:06:15,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:15,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 23:06:15,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665586635] [2020-08-22 23:06:15,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 23:06:15,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:15,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 23:06:15,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-08-22 23:06:15,624 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 30 states. [2020-08-22 23:06:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:16,470 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2020-08-22 23:06:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-22 23:06:16,471 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 249 [2020-08-22 23:06:16,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:16,472 INFO L225 Difference]: With dead ends: 284 [2020-08-22 23:06:16,472 INFO L226 Difference]: Without dead ends: 268 [2020-08-22 23:06:16,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 23:06:16,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-22 23:06:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 258. [2020-08-22 23:06:16,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-08-22 23:06:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2020-08-22 23:06:16,512 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 249 [2020-08-22 23:06:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:16,512 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2020-08-22 23:06:16,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 23:06:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2020-08-22 23:06:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-08-22 23:06:16,515 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:16,515 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:16,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 23:06:16,516 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:16,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:16,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1200359549, now seen corresponding path program 26 times [2020-08-22 23:06:16,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:16,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343167506] [2020-08-22 23:06:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:18,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3055 backedges. 0 proven. 3055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:18,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343167506] [2020-08-22 23:06:18,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:18,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-22 23:06:18,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453052245] [2020-08-22 23:06:18,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-22 23:06:18,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:18,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-22 23:06:18,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3055, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 23:06:18,393 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 57 states. [2020-08-22 23:06:21,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:21,501 INFO L93 Difference]: Finished difference Result 271 states and 272 transitions. [2020-08-22 23:06:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-22 23:06:21,502 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 251 [2020-08-22 23:06:21,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:21,504 INFO L225 Difference]: With dead ends: 271 [2020-08-22 23:06:21,505 INFO L226 Difference]: Without dead ends: 264 [2020-08-22 23:06:21,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=387, Invalid=10955, Unknown=0, NotChecked=0, Total=11342 [2020-08-22 23:06:21,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-22 23:06:21,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 261. [2020-08-22 23:06:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-08-22 23:06:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2020-08-22 23:06:21,545 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 251 [2020-08-22 23:06:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:21,546 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2020-08-22 23:06:21,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-22 23:06:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2020-08-22 23:06:21,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-08-22 23:06:21,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:21,547 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:21,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 23:06:21,547 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:21,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:21,547 INFO L82 PathProgramCache]: Analyzing trace with hash 223418390, now seen corresponding path program 27 times [2020-08-22 23:06:21,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:21,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599337256] [2020-08-22 23:06:21,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:23,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:23,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599337256] [2020-08-22 23:06:23,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:23,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-08-22 23:06:23,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377789344] [2020-08-22 23:06:23,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-08-22 23:06:23,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:23,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-08-22 23:06:23,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=3280, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 23:06:23,581 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand 59 states. [2020-08-22 23:06:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:27,066 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2020-08-22 23:06:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-08-22 23:06:27,067 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 258 [2020-08-22 23:06:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:27,069 INFO L225 Difference]: With dead ends: 280 [2020-08-22 23:06:27,070 INFO L226 Difference]: Without dead ends: 273 [2020-08-22 23:06:27,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=402, Invalid=11808, Unknown=0, NotChecked=0, Total=12210 [2020-08-22 23:06:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-08-22 23:06:27,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 270. [2020-08-22 23:06:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-08-22 23:06:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2020-08-22 23:06:27,123 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 258 [2020-08-22 23:06:27,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:27,124 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2020-08-22 23:06:27,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-08-22 23:06:27,124 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2020-08-22 23:06:27,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-08-22 23:06:27,125 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:27,125 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 27, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:27,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 23:06:27,125 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:27,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:27,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1044595677, now seen corresponding path program 28 times [2020-08-22 23:06:27,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:27,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516556995] [2020-08-22 23:06:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:27,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 3213 trivial. 0 not checked. [2020-08-22 23:06:27,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516556995] [2020-08-22 23:06:27,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:06:27,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:06:27,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530065409] [2020-08-22 23:06:27,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:06:27,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:27,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:06:27,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:06:27,233 INFO L87 Difference]: Start difference. First operand 270 states and 272 transitions. Second operand 3 states. [2020-08-22 23:06:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:27,315 INFO L93 Difference]: Finished difference Result 288 states and 292 transitions. [2020-08-22 23:06:27,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:06:27,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 265 [2020-08-22 23:06:27,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:27,317 INFO L225 Difference]: With dead ends: 288 [2020-08-22 23:06:27,317 INFO L226 Difference]: Without dead ends: 271 [2020-08-22 23:06:27,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:06:27,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-08-22 23:06:27,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2020-08-22 23:06:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-22 23:06:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2020-08-22 23:06:27,362 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 265 [2020-08-22 23:06:27,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:27,363 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2020-08-22 23:06:27,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:06:27,363 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2020-08-22 23:06:27,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-08-22 23:06:27,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:27,364 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:27,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 23:06:27,365 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:27,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:27,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1372310976, now seen corresponding path program 29 times [2020-08-22 23:06:27,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:27,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270002863] [2020-08-22 23:06:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:28,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 28 proven. 3458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:28,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270002863] [2020-08-22 23:06:28,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:28,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 23:06:28,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788870111] [2020-08-22 23:06:28,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 23:06:28,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:28,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 23:06:28,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-08-22 23:06:28,053 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 32 states. [2020-08-22 23:06:29,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:29,030 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2020-08-22 23:06:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-08-22 23:06:29,031 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 267 [2020-08-22 23:06:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:29,033 INFO L225 Difference]: With dead ends: 295 [2020-08-22 23:06:29,033 INFO L226 Difference]: Without dead ends: 287 [2020-08-22 23:06:29,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 23:06:29,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-08-22 23:06:29,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 277. [2020-08-22 23:06:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-08-22 23:06:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2020-08-22 23:06:29,082 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 267 [2020-08-22 23:06:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:29,082 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2020-08-22 23:06:29,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 23:06:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2020-08-22 23:06:29,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-08-22 23:06:29,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:29,084 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:29,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 23:06:29,084 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:29,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:29,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1614229437, now seen corresponding path program 27 times [2020-08-22 23:06:29,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:29,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415559395] [2020-08-22 23:06:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:31,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3542 backedges. 0 proven. 3542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:31,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415559395] [2020-08-22 23:06:31,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:31,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-08-22 23:06:31,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091436391] [2020-08-22 23:06:31,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-08-22 23:06:31,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:31,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-08-22 23:06:31,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=3513, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 23:06:31,233 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 61 states. [2020-08-22 23:06:34,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:34,976 INFO L93 Difference]: Finished difference Result 290 states and 291 transitions. [2020-08-22 23:06:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-08-22 23:06:34,977 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 269 [2020-08-22 23:06:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:34,979 INFO L225 Difference]: With dead ends: 290 [2020-08-22 23:06:34,980 INFO L226 Difference]: Without dead ends: 283 [2020-08-22 23:06:34,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3543 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=417, Invalid=12693, Unknown=0, NotChecked=0, Total=13110 [2020-08-22 23:06:34,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-08-22 23:06:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2020-08-22 23:06:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-22 23:06:35,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2020-08-22 23:06:35,033 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 269 [2020-08-22 23:06:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:35,034 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2020-08-22 23:06:35,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-08-22 23:06:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2020-08-22 23:06:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-08-22 23:06:35,035 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:35,035 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:35,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 23:06:35,035 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:35,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:35,036 INFO L82 PathProgramCache]: Analyzing trace with hash -432347306, now seen corresponding path program 30 times [2020-08-22 23:06:35,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:35,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167543430] [2020-08-22 23:06:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:35,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 29 proven. 3712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:35,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167543430] [2020-08-22 23:06:35,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:35,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 23:06:35,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439578142] [2020-08-22 23:06:35,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 23:06:35,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:35,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 23:06:35,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 23:06:35,774 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand 33 states. [2020-08-22 23:06:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:36,857 INFO L93 Difference]: Finished difference Result 304 states and 306 transitions. [2020-08-22 23:06:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-08-22 23:06:36,857 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 276 [2020-08-22 23:06:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:36,859 INFO L225 Difference]: With dead ends: 304 [2020-08-22 23:06:36,860 INFO L226 Difference]: Without dead ends: 296 [2020-08-22 23:06:36,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 23:06:36,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-08-22 23:06:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 286. [2020-08-22 23:06:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-08-22 23:06:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2020-08-22 23:06:36,929 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 276 [2020-08-22 23:06:36,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:36,929 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2020-08-22 23:06:36,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 23:06:36,930 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2020-08-22 23:06:36,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-08-22 23:06:36,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:36,931 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:36,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 23:06:36,932 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:36,932 INFO L82 PathProgramCache]: Analyzing trace with hash -252274727, now seen corresponding path program 28 times [2020-08-22 23:06:36,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:36,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365245247] [2020-08-22 23:06:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:39,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3799 backedges. 0 proven. 3799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:39,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365245247] [2020-08-22 23:06:39,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:39,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-08-22 23:06:39,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143765077] [2020-08-22 23:06:39,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-08-22 23:06:39,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:39,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-08-22 23:06:39,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=3754, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 23:06:39,368 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand 63 states. [2020-08-22 23:06:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:43,345 INFO L93 Difference]: Finished difference Result 299 states and 300 transitions. [2020-08-22 23:06:43,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-08-22 23:06:43,346 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 278 [2020-08-22 23:06:43,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:43,348 INFO L225 Difference]: With dead ends: 299 [2020-08-22 23:06:43,348 INFO L226 Difference]: Without dead ends: 292 [2020-08-22 23:06:43,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3814 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=432, Invalid=13610, Unknown=0, NotChecked=0, Total=14042 [2020-08-22 23:06:43,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-22 23:06:43,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2020-08-22 23:06:43,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-08-22 23:06:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2020-08-22 23:06:43,422 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 278 [2020-08-22 23:06:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:43,422 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2020-08-22 23:06:43,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-08-22 23:06:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2020-08-22 23:06:43,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-08-22 23:06:43,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:43,424 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:43,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 23:06:43,425 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:43,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:43,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1077906176, now seen corresponding path program 31 times [2020-08-22 23:06:43,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:43,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434762128] [2020-08-22 23:06:43,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:44,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 30 proven. 3975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:44,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434762128] [2020-08-22 23:06:44,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:44,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 23:06:44,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888831043] [2020-08-22 23:06:44,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 23:06:44,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:44,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 23:06:44,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 23:06:44,234 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand 34 states. [2020-08-22 23:06:45,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:45,400 INFO L93 Difference]: Finished difference Result 313 states and 315 transitions. [2020-08-22 23:06:45,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-08-22 23:06:45,401 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 285 [2020-08-22 23:06:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:45,403 INFO L225 Difference]: With dead ends: 313 [2020-08-22 23:06:45,404 INFO L226 Difference]: Without dead ends: 305 [2020-08-22 23:06:45,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 23:06:45,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-08-22 23:06:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 295. [2020-08-22 23:06:45,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-08-22 23:06:45,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2020-08-22 23:06:45,453 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 285 [2020-08-22 23:06:45,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:45,454 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2020-08-22 23:06:45,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 23:06:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2020-08-22 23:06:45,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-08-22 23:06:45,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:45,456 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:45,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-22 23:06:45,456 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:45,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:45,457 INFO L82 PathProgramCache]: Analyzing trace with hash -597624573, now seen corresponding path program 29 times [2020-08-22 23:06:45,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:45,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721983890] [2020-08-22 23:06:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:47,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4065 backedges. 0 proven. 4065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:48,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721983890] [2020-08-22 23:06:48,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:48,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-08-22 23:06:48,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832036135] [2020-08-22 23:06:48,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-08-22 23:06:48,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:48,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-08-22 23:06:48,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=4003, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 23:06:48,079 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 65 states. [2020-08-22 23:06:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:52,392 INFO L93 Difference]: Finished difference Result 308 states and 309 transitions. [2020-08-22 23:06:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-08-22 23:06:52,393 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 287 [2020-08-22 23:06:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:52,395 INFO L225 Difference]: With dead ends: 308 [2020-08-22 23:06:52,395 INFO L226 Difference]: Without dead ends: 301 [2020-08-22 23:06:52,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=447, Invalid=14559, Unknown=0, NotChecked=0, Total=15006 [2020-08-22 23:06:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-08-22 23:06:52,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2020-08-22 23:06:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-08-22 23:06:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2020-08-22 23:06:52,449 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 287 [2020-08-22 23:06:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:52,449 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2020-08-22 23:06:52,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-08-22 23:06:52,449 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2020-08-22 23:06:52,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-08-22 23:06:52,452 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:52,452 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:52,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-22 23:06:52,452 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:52,453 INFO L82 PathProgramCache]: Analyzing trace with hash -427333994, now seen corresponding path program 32 times [2020-08-22 23:06:52,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:52,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125300309] [2020-08-22 23:06:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:53,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 31 proven. 4247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:53,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125300309] [2020-08-22 23:06:53,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:53,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-22 23:06:53,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005989774] [2020-08-22 23:06:53,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 23:06:53,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:53,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 23:06:53,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 23:06:53,332 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand 35 states. [2020-08-22 23:06:54,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:54,577 INFO L93 Difference]: Finished difference Result 322 states and 324 transitions. [2020-08-22 23:06:54,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-08-22 23:06:54,578 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 294 [2020-08-22 23:06:54,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:54,581 INFO L225 Difference]: With dead ends: 322 [2020-08-22 23:06:54,581 INFO L226 Difference]: Without dead ends: 314 [2020-08-22 23:06:54,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-08-22 23:06:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-08-22 23:06:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2020-08-22 23:06:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-22 23:06:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 305 transitions. [2020-08-22 23:06:54,658 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 305 transitions. Word has length 294 [2020-08-22 23:06:54,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:54,659 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 305 transitions. [2020-08-22 23:06:54,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 23:06:54,659 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 305 transitions. [2020-08-22 23:06:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-08-22 23:06:54,661 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:54,661 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:54,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-08-22 23:06:54,661 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:54,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:54,662 INFO L82 PathProgramCache]: Analyzing trace with hash 270550809, now seen corresponding path program 30 times [2020-08-22 23:06:54,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:54,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889493287] [2020-08-22 23:06:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4340 backedges. 0 proven. 4340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:57,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889493287] [2020-08-22 23:06:57,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:57,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-08-22 23:06:57,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888827808] [2020-08-22 23:06:57,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-08-22 23:06:57,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:57,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-08-22 23:06:57,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=4260, Unknown=0, NotChecked=0, Total=4422 [2020-08-22 23:06:57,529 INFO L87 Difference]: Start difference. First operand 304 states and 305 transitions. Second operand 67 states. [2020-08-22 23:07:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:02,304 INFO L93 Difference]: Finished difference Result 317 states and 318 transitions. [2020-08-22 23:07:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-08-22 23:07:02,305 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 296 [2020-08-22 23:07:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:02,307 INFO L225 Difference]: With dead ends: 317 [2020-08-22 23:07:02,307 INFO L226 Difference]: Without dead ends: 310 [2020-08-22 23:07:02,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4386 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=462, Invalid=15540, Unknown=0, NotChecked=0, Total=16002 [2020-08-22 23:07:02,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-08-22 23:07:02,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-08-22 23:07:02,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-08-22 23:07:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2020-08-22 23:07:02,367 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 296 [2020-08-22 23:07:02,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:02,367 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2020-08-22 23:07:02,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-08-22 23:07:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2020-08-22 23:07:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-08-22 23:07:02,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:02,369 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:02,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-08-22 23:07:02,370 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:02,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1458451392, now seen corresponding path program 33 times [2020-08-22 23:07:02,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:02,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644984788] [2020-08-22 23:07:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:03,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 32 proven. 4528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:07:03,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644984788] [2020-08-22 23:07:03,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:03,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 23:07:03,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26192296] [2020-08-22 23:07:03,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 23:07:03,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:03,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 23:07:03,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 23:07:03,290 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 36 states. [2020-08-22 23:07:04,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:04,678 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2020-08-22 23:07:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-08-22 23:07:04,679 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 303 [2020-08-22 23:07:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:04,682 INFO L225 Difference]: With dead ends: 331 [2020-08-22 23:07:04,683 INFO L226 Difference]: Without dead ends: 323 [2020-08-22 23:07:04,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 23:07:04,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-08-22 23:07:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 313. [2020-08-22 23:07:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-08-22 23:07:04,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2020-08-22 23:07:04,750 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 303 [2020-08-22 23:07:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:04,750 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2020-08-22 23:07:04,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 23:07:04,750 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2020-08-22 23:07:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-08-22 23:07:04,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:04,751 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:04,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-08-22 23:07:04,752 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:04,752 INFO L82 PathProgramCache]: Analyzing trace with hash 34107843, now seen corresponding path program 31 times [2020-08-22 23:07:04,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:04,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992770582] [2020-08-22 23:07:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:07,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:07:07,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992770582] [2020-08-22 23:07:07,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:07,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-08-22 23:07:07,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264377009] [2020-08-22 23:07:07,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-08-22 23:07:07,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:07,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-08-22 23:07:07,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=4525, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 23:07:07,885 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand 69 states. [2020-08-22 23:07:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:12,938 INFO L93 Difference]: Finished difference Result 326 states and 327 transitions. [2020-08-22 23:07:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-08-22 23:07:12,939 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 305 [2020-08-22 23:07:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:12,941 INFO L225 Difference]: With dead ends: 326 [2020-08-22 23:07:12,941 INFO L226 Difference]: Without dead ends: 319 [2020-08-22 23:07:12,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4687 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=477, Invalid=16553, Unknown=0, NotChecked=0, Total=17030 [2020-08-22 23:07:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-08-22 23:07:13,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 316. [2020-08-22 23:07:13,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-08-22 23:07:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 317 transitions. [2020-08-22 23:07:13,018 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 317 transitions. Word has length 305 [2020-08-22 23:07:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:13,018 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 317 transitions. [2020-08-22 23:07:13,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-08-22 23:07:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 317 transitions. [2020-08-22 23:07:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-08-22 23:07:13,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:13,019 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:13,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-08-22 23:07:13,019 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:13,020 INFO L82 PathProgramCache]: Analyzing trace with hash -588605994, now seen corresponding path program 34 times [2020-08-22 23:07:13,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:13,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211107681] [2020-08-22 23:07:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 33 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:07:14,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211107681] [2020-08-22 23:07:14,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:14,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 23:07:14,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883817564] [2020-08-22 23:07:14,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 23:07:14,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:14,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 23:07:14,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 23:07:14,008 INFO L87 Difference]: Start difference. First operand 316 states and 317 transitions. Second operand 37 states. [2020-08-22 23:07:15,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:15,465 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2020-08-22 23:07:15,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-08-22 23:07:15,466 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 312 [2020-08-22 23:07:15,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:15,468 INFO L225 Difference]: With dead ends: 340 [2020-08-22 23:07:15,469 INFO L226 Difference]: Without dead ends: 332 [2020-08-22 23:07:15,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 23:07:15,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-08-22 23:07:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 322. [2020-08-22 23:07:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-08-22 23:07:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2020-08-22 23:07:15,526 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 312 [2020-08-22 23:07:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:15,527 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2020-08-22 23:07:15,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 23:07:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2020-08-22 23:07:15,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-08-22 23:07:15,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:15,529 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:15,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-08-22 23:07:15,529 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:15,529 INFO L82 PathProgramCache]: Analyzing trace with hash -93018535, now seen corresponding path program 32 times [2020-08-22 23:07:15,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:15,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995421833] [2020-08-22 23:07:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:18,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4917 backedges. 0 proven. 4917 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:07:18,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995421833] [2020-08-22 23:07:18,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:18,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-08-22 23:07:18,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49987196] [2020-08-22 23:07:18,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-08-22 23:07:18,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:18,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-08-22 23:07:18,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=4798, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 23:07:18,998 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand 71 states. [2020-08-22 23:07:24,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:24,406 INFO L93 Difference]: Finished difference Result 335 states and 336 transitions. [2020-08-22 23:07:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-08-22 23:07:24,407 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 314 [2020-08-22 23:07:24,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:24,409 INFO L225 Difference]: With dead ends: 335 [2020-08-22 23:07:24,409 INFO L226 Difference]: Without dead ends: 328 [2020-08-22 23:07:24,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4998 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=492, Invalid=17598, Unknown=0, NotChecked=0, Total=18090 [2020-08-22 23:07:24,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-08-22 23:07:24,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 325. [2020-08-22 23:07:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-08-22 23:07:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2020-08-22 23:07:24,475 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 314 [2020-08-22 23:07:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:24,476 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2020-08-22 23:07:24,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-08-22 23:07:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2020-08-22 23:07:24,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-08-22 23:07:24,477 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:24,477 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:24,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-08-22 23:07:24,477 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:24,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:24,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1846291584, now seen corresponding path program 35 times [2020-08-22 23:07:24,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:24,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468135057] [2020-08-22 23:07:24,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 34 proven. 5117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:07:25,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468135057] [2020-08-22 23:07:25,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:25,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 23:07:25,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049299981] [2020-08-22 23:07:25,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 23:07:25,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:25,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 23:07:25,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 23:07:25,561 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand 38 states. [2020-08-22 23:07:27,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:27,143 INFO L93 Difference]: Finished difference Result 349 states and 351 transitions. [2020-08-22 23:07:27,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-08-22 23:07:27,144 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 321 [2020-08-22 23:07:27,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:27,146 INFO L225 Difference]: With dead ends: 349 [2020-08-22 23:07:27,146 INFO L226 Difference]: Without dead ends: 341 [2020-08-22 23:07:27,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 23:07:27,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-08-22 23:07:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 331. [2020-08-22 23:07:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-08-22 23:07:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2020-08-22 23:07:27,206 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 321 [2020-08-22 23:07:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:27,206 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2020-08-22 23:07:27,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 23:07:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2020-08-22 23:07:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-08-22 23:07:27,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:27,208 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:27,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-08-22 23:07:27,208 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash -913622397, now seen corresponding path program 33 times [2020-08-22 23:07:27,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:27,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662375031] [2020-08-22 23:07:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:30,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5219 backedges. 0 proven. 5219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:07:30,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662375031] [2020-08-22 23:07:30,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:30,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-08-22 23:07:30,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335905418] [2020-08-22 23:07:30,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-08-22 23:07:30,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:30,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-08-22 23:07:30,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=5079, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 23:07:30,943 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 73 states. [2020-08-22 23:07:36,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:36,786 INFO L93 Difference]: Finished difference Result 344 states and 345 transitions. [2020-08-22 23:07:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-08-22 23:07:36,788 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 323 [2020-08-22 23:07:36,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:36,790 INFO L225 Difference]: With dead ends: 344 [2020-08-22 23:07:36,790 INFO L226 Difference]: Without dead ends: 337 [2020-08-22 23:07:36,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5319 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=507, Invalid=18675, Unknown=0, NotChecked=0, Total=19182 [2020-08-22 23:07:36,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-08-22 23:07:36,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 334. [2020-08-22 23:07:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-08-22 23:07:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 335 transitions. [2020-08-22 23:07:36,854 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 335 transitions. Word has length 323 [2020-08-22 23:07:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:36,854 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 335 transitions. [2020-08-22 23:07:36,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-08-22 23:07:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 335 transitions. [2020-08-22 23:07:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 23:07:36,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:36,855 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:36,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-08-22 23:07:36,856 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:36,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:36,856 INFO L82 PathProgramCache]: Analyzing trace with hash -753371882, now seen corresponding path program 36 times [2020-08-22 23:07:36,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:36,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911119601] [2020-08-22 23:07:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:37,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 35 proven. 5425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:07:38,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911119601] [2020-08-22 23:07:38,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:38,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-22 23:07:38,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861650755] [2020-08-22 23:07:38,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 23:07:38,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:38,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 23:07:38,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 23:07:38,041 INFO L87 Difference]: Start difference. First operand 334 states and 335 transitions. Second operand 39 states. [2020-08-22 23:07:39,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:39,771 INFO L93 Difference]: Finished difference Result 358 states and 360 transitions. [2020-08-22 23:07:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-08-22 23:07:39,773 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 330 [2020-08-22 23:07:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:39,775 INFO L225 Difference]: With dead ends: 358 [2020-08-22 23:07:39,775 INFO L226 Difference]: Without dead ends: 350 [2020-08-22 23:07:39,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-08-22 23:07:39,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-08-22 23:07:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2020-08-22 23:07:39,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-08-22 23:07:39,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 341 transitions. [2020-08-22 23:07:39,840 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 341 transitions. Word has length 330 [2020-08-22 23:07:39,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:39,840 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 341 transitions. [2020-08-22 23:07:39,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 23:07:39,840 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 341 transitions. [2020-08-22 23:07:39,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-22 23:07:39,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:39,841 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:39,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-08-22 23:07:39,842 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:39,842 INFO L82 PathProgramCache]: Analyzing trace with hash 480753049, now seen corresponding path program 34 times [2020-08-22 23:07:39,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:39,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339351512] [2020-08-22 23:07:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:43,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5530 backedges. 0 proven. 5530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:07:43,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339351512] [2020-08-22 23:07:43,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:43,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-08-22 23:07:43,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909279920] [2020-08-22 23:07:43,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-08-22 23:07:43,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:43,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-08-22 23:07:43,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=5368, Unknown=0, NotChecked=0, Total=5550 [2020-08-22 23:07:43,954 INFO L87 Difference]: Start difference. First operand 340 states and 341 transitions. Second operand 75 states. [2020-08-22 23:07:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:50,368 INFO L93 Difference]: Finished difference Result 353 states and 354 transitions. [2020-08-22 23:07:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-08-22 23:07:50,369 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 332 [2020-08-22 23:07:50,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:50,372 INFO L225 Difference]: With dead ends: 353 [2020-08-22 23:07:50,372 INFO L226 Difference]: Without dead ends: 346 [2020-08-22 23:07:50,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5650 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=522, Invalid=19784, Unknown=0, NotChecked=0, Total=20306 [2020-08-22 23:07:50,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-08-22 23:07:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 343. [2020-08-22 23:07:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-08-22 23:07:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2020-08-22 23:07:50,451 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 332 [2020-08-22 23:07:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:50,451 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2020-08-22 23:07:50,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-08-22 23:07:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2020-08-22 23:07:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-08-22 23:07:50,452 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:50,452 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:50,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-08-22 23:07:50,452 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:50,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:50,453 INFO L82 PathProgramCache]: Analyzing trace with hash 644183360, now seen corresponding path program 37 times [2020-08-22 23:07:50,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:50,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075506739] [2020-08-22 23:07:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:51,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 36 proven. 5742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:07:51,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075506739] [2020-08-22 23:07:51,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:51,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 23:07:51,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518942796] [2020-08-22 23:07:51,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 23:07:51,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:51,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 23:07:51,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 23:07:51,769 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 40 states. [2020-08-22 23:07:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:53,753 INFO L93 Difference]: Finished difference Result 367 states and 369 transitions. [2020-08-22 23:07:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-08-22 23:07:53,754 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 339 [2020-08-22 23:07:53,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:53,757 INFO L225 Difference]: With dead ends: 367 [2020-08-22 23:07:53,757 INFO L226 Difference]: Without dead ends: 359 [2020-08-22 23:07:53,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-08-22 23:07:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-08-22 23:07:53,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 349. [2020-08-22 23:07:53,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-08-22 23:07:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 350 transitions. [2020-08-22 23:07:53,824 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 350 transitions. Word has length 339 [2020-08-22 23:07:53,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:53,825 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 350 transitions. [2020-08-22 23:07:53,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 23:07:53,825 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 350 transitions. [2020-08-22 23:07:53,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-08-22 23:07:53,826 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:53,826 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:53,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-08-22 23:07:53,827 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:53,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:53,827 INFO L82 PathProgramCache]: Analyzing trace with hash -793423037, now seen corresponding path program 35 times [2020-08-22 23:07:53,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:53,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853283483] [2020-08-22 23:07:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:58,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5850 backedges. 0 proven. 5850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:07:58,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853283483] [2020-08-22 23:07:58,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:58,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-08-22 23:07:58,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034643441] [2020-08-22 23:07:58,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-08-22 23:07:58,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:58,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-08-22 23:07:58,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=5665, Unknown=0, NotChecked=0, Total=5852 [2020-08-22 23:07:58,420 INFO L87 Difference]: Start difference. First operand 349 states and 350 transitions. Second operand 77 states. [2020-08-22 23:08:05,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:05,444 INFO L93 Difference]: Finished difference Result 362 states and 363 transitions. [2020-08-22 23:08:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-08-22 23:08:05,445 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 341 [2020-08-22 23:08:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:05,447 INFO L225 Difference]: With dead ends: 362 [2020-08-22 23:08:05,447 INFO L226 Difference]: Without dead ends: 355 [2020-08-22 23:08:05,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5991 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=537, Invalid=20925, Unknown=0, NotChecked=0, Total=21462 [2020-08-22 23:08:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-08-22 23:08:05,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 352. [2020-08-22 23:08:05,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-22 23:08:05,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2020-08-22 23:08:05,522 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 341 [2020-08-22 23:08:05,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:05,523 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2020-08-22 23:08:05,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-08-22 23:08:05,523 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2020-08-22 23:08:05,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-08-22 23:08:05,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:05,525 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:08:05,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-08-22 23:08:05,525 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:05,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1304757334, now seen corresponding path program 38 times [2020-08-22 23:08:05,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:05,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500147581] [2020-08-22 23:08:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:07,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 37 proven. 6068 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:08:07,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500147581] [2020-08-22 23:08:07,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:07,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 23:08:07,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853761876] [2020-08-22 23:08:07,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 23:08:07,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:07,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 23:08:07,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 23:08:07,093 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 41 states. [2020-08-22 23:08:09,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:09,252 INFO L93 Difference]: Finished difference Result 376 states and 378 transitions. [2020-08-22 23:08:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-08-22 23:08:09,254 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 348 [2020-08-22 23:08:09,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:09,256 INFO L225 Difference]: With dead ends: 376 [2020-08-22 23:08:09,256 INFO L226 Difference]: Without dead ends: 368 [2020-08-22 23:08:09,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 23:08:09,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-08-22 23:08:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 358. [2020-08-22 23:08:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-08-22 23:08:09,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 359 transitions. [2020-08-22 23:08:09,329 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 359 transitions. Word has length 348 [2020-08-22 23:08:09,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:09,329 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 359 transitions. [2020-08-22 23:08:09,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 23:08:09,329 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 359 transitions. [2020-08-22 23:08:09,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-08-22 23:08:09,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:09,331 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:08:09,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-08-22 23:08:09,332 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:09,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1636993831, now seen corresponding path program 36 times [2020-08-22 23:08:09,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:09,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437276818] [2020-08-22 23:08:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:14,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 6179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:08:14,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437276818] [2020-08-22 23:08:14,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:14,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-08-22 23:08:14,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368280966] [2020-08-22 23:08:14,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-08-22 23:08:14,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:14,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-08-22 23:08:14,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5970, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 23:08:14,361 INFO L87 Difference]: Start difference. First operand 358 states and 359 transitions. Second operand 79 states. [2020-08-22 23:08:25,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:25,476 INFO L93 Difference]: Finished difference Result 371 states and 372 transitions. [2020-08-22 23:08:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-08-22 23:08:25,478 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 350 [2020-08-22 23:08:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:25,480 INFO L225 Difference]: With dead ends: 371 [2020-08-22 23:08:25,480 INFO L226 Difference]: Without dead ends: 364 [2020-08-22 23:08:25,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6342 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=552, Invalid=22098, Unknown=0, NotChecked=0, Total=22650 [2020-08-22 23:08:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-08-22 23:08:25,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 361. [2020-08-22 23:08:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-08-22 23:08:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 362 transitions. [2020-08-22 23:08:25,560 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 362 transitions. Word has length 350 [2020-08-22 23:08:25,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:25,561 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 362 transitions. [2020-08-22 23:08:25,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-08-22 23:08:25,561 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 362 transitions. [2020-08-22 23:08:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-08-22 23:08:25,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:25,563 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:08:25,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-08-22 23:08:25,563 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:25,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:25,564 INFO L82 PathProgramCache]: Analyzing trace with hash 96865792, now seen corresponding path program 39 times [2020-08-22 23:08:25,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:25,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237203148] [2020-08-22 23:08:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:27,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 38 proven. 6403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:08:27,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237203148] [2020-08-22 23:08:27,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:27,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 23:08:27,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941606982] [2020-08-22 23:08:27,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 23:08:27,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:27,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 23:08:27,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 23:08:27,292 INFO L87 Difference]: Start difference. First operand 361 states and 362 transitions. Second operand 42 states. [2020-08-22 23:08:29,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:29,670 INFO L93 Difference]: Finished difference Result 385 states and 387 transitions. [2020-08-22 23:08:29,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-08-22 23:08:29,671 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 357 [2020-08-22 23:08:29,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:29,674 INFO L225 Difference]: With dead ends: 385 [2020-08-22 23:08:29,674 INFO L226 Difference]: Without dead ends: 377 [2020-08-22 23:08:29,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-08-22 23:08:29,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-08-22 23:08:29,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 367. [2020-08-22 23:08:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-08-22 23:08:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 368 transitions. [2020-08-22 23:08:29,751 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 368 transitions. Word has length 357 [2020-08-22 23:08:29,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:29,752 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 368 transitions. [2020-08-22 23:08:29,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 23:08:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 368 transitions. [2020-08-22 23:08:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-08-22 23:08:29,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:29,754 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:08:29,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-08-22 23:08:29,754 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:29,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:29,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1515371523, now seen corresponding path program 37 times [2020-08-22 23:08:29,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:29,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794729334] [2020-08-22 23:08:29,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:34,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6517 backedges. 0 proven. 6517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:08:35,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794729334] [2020-08-22 23:08:35,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:35,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-08-22 23:08:35,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591692462] [2020-08-22 23:08:35,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-08-22 23:08:35,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:35,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-08-22 23:08:35,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=6283, Unknown=0, NotChecked=0, Total=6480 [2020-08-22 23:08:35,081 INFO L87 Difference]: Start difference. First operand 367 states and 368 transitions. Second operand 81 states. [2020-08-22 23:08:44,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:44,320 INFO L93 Difference]: Finished difference Result 380 states and 381 transitions. [2020-08-22 23:08:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-08-22 23:08:44,322 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 359 [2020-08-22 23:08:44,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:44,325 INFO L225 Difference]: With dead ends: 380 [2020-08-22 23:08:44,325 INFO L226 Difference]: Without dead ends: 373 [2020-08-22 23:08:44,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6703 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=567, Invalid=23303, Unknown=0, NotChecked=0, Total=23870 [2020-08-22 23:08:44,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-08-22 23:08:44,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 370. [2020-08-22 23:08:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-08-22 23:08:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 371 transitions. [2020-08-22 23:08:44,403 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 371 transitions. Word has length 359 [2020-08-22 23:08:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:44,403 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 371 transitions. [2020-08-22 23:08:44,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-08-22 23:08:44,404 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 371 transitions. [2020-08-22 23:08:44,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-08-22 23:08:44,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:44,405 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:08:44,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-08-22 23:08:44,405 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:44,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1935391850, now seen corresponding path program 40 times [2020-08-22 23:08:44,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:44,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712435111] [2020-08-22 23:08:44,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:46,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 39 proven. 6747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:08:46,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712435111] [2020-08-22 23:08:46,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:46,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-22 23:08:46,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59962662] [2020-08-22 23:08:46,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 23:08:46,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:46,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 23:08:46,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 23:08:46,220 INFO L87 Difference]: Start difference. First operand 370 states and 371 transitions. Second operand 43 states. [2020-08-22 23:08:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:48,752 INFO L93 Difference]: Finished difference Result 394 states and 396 transitions. [2020-08-22 23:08:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-08-22 23:08:48,754 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 366 [2020-08-22 23:08:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:48,756 INFO L225 Difference]: With dead ends: 394 [2020-08-22 23:08:48,756 INFO L226 Difference]: Without dead ends: 386 [2020-08-22 23:08:48,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-08-22 23:08:48,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-08-22 23:08:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2020-08-22 23:08:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-08-22 23:08:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 377 transitions. [2020-08-22 23:08:48,845 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 377 transitions. Word has length 366 [2020-08-22 23:08:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:48,846 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 377 transitions. [2020-08-22 23:08:48,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 23:08:48,846 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 377 transitions. [2020-08-22 23:08:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-08-22 23:08:48,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:48,848 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:08:48,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-08-22 23:08:48,848 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:48,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1569070055, now seen corresponding path program 38 times [2020-08-22 23:08:48,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:48,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129851629] [2020-08-22 23:08:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:54,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6864 backedges. 0 proven. 6864 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:08:54,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129851629] [2020-08-22 23:08:54,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:54,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-08-22 23:08:54,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703051256] [2020-08-22 23:08:54,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-08-22 23:08:54,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:54,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-08-22 23:08:54,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=6604, Unknown=0, NotChecked=0, Total=6806 [2020-08-22 23:08:54,892 INFO L87 Difference]: Start difference. First operand 376 states and 377 transitions. Second operand 83 states. [2020-08-22 23:09:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:09:05,284 INFO L93 Difference]: Finished difference Result 389 states and 390 transitions. [2020-08-22 23:09:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-08-22 23:09:05,285 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 368 [2020-08-22 23:09:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:09:05,288 INFO L225 Difference]: With dead ends: 389 [2020-08-22 23:09:05,288 INFO L226 Difference]: Without dead ends: 382 [2020-08-22 23:09:05,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7074 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=582, Invalid=24540, Unknown=0, NotChecked=0, Total=25122 [2020-08-22 23:09:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-08-22 23:09:05,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 379. [2020-08-22 23:09:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-08-22 23:09:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 380 transitions. [2020-08-22 23:09:05,377 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 380 transitions. Word has length 368 [2020-08-22 23:09:05,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:09:05,377 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 380 transitions. [2020-08-22 23:09:05,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-08-22 23:09:05,377 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 380 transitions. [2020-08-22 23:09:05,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-08-22 23:09:05,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:09:05,380 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:09:05,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-08-22 23:09:05,380 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:09:05,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:09:05,380 INFO L82 PathProgramCache]: Analyzing trace with hash 922351296, now seen corresponding path program 41 times [2020-08-22 23:09:05,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:09:05,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229628535] [2020-08-22 23:09:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:09:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:09:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 40 proven. 7100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:09:07,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229628535] [2020-08-22 23:09:07,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:09:07,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 23:09:07,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611770802] [2020-08-22 23:09:07,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 23:09:07,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:09:07,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 23:09:07,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 23:09:07,369 INFO L87 Difference]: Start difference. First operand 379 states and 380 transitions. Second operand 44 states. [2020-08-22 23:09:10,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:09:10,221 INFO L93 Difference]: Finished difference Result 403 states and 405 transitions. [2020-08-22 23:09:10,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-08-22 23:09:10,223 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 375 [2020-08-22 23:09:10,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:09:10,226 INFO L225 Difference]: With dead ends: 403 [2020-08-22 23:09:10,226 INFO L226 Difference]: Without dead ends: 395 [2020-08-22 23:09:10,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-08-22 23:09:10,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-08-22 23:09:10,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 385. [2020-08-22 23:09:10,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-08-22 23:09:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2020-08-22 23:09:10,315 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 375 [2020-08-22 23:09:10,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:09:10,315 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2020-08-22 23:09:10,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 23:09:10,316 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2020-08-22 23:09:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-08-22 23:09:10,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:09:10,318 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:09:10,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-08-22 23:09:10,318 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:09:10,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:09:10,319 INFO L82 PathProgramCache]: Analyzing trace with hash 237991107, now seen corresponding path program 39 times [2020-08-22 23:09:10,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:09:10,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906080888] [2020-08-22 23:09:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:09:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:17,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:09:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7220 backedges. 0 proven. 7220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:09:17,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906080888] [2020-08-22 23:09:17,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:09:17,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-08-22 23:09:17,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036663613] [2020-08-22 23:09:17,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-08-22 23:09:17,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:09:17,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-08-22 23:09:17,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=6933, Unknown=0, NotChecked=0, Total=7140 [2020-08-22 23:09:17,313 INFO L87 Difference]: Start difference. First operand 385 states and 386 transitions. Second operand 85 states. [2020-08-22 23:09:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:09:33,848 INFO L93 Difference]: Finished difference Result 398 states and 399 transitions. [2020-08-22 23:09:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-08-22 23:09:33,850 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 377 [2020-08-22 23:09:33,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:09:33,853 INFO L225 Difference]: With dead ends: 398 [2020-08-22 23:09:33,853 INFO L226 Difference]: Without dead ends: 391 [2020-08-22 23:09:33,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7455 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=597, Invalid=25809, Unknown=0, NotChecked=0, Total=26406 [2020-08-22 23:09:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-08-22 23:09:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 388. [2020-08-22 23:09:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-08-22 23:09:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 389 transitions. [2020-08-22 23:09:33,940 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 389 transitions. Word has length 377 [2020-08-22 23:09:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:09:33,941 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 389 transitions. [2020-08-22 23:09:33,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-08-22 23:09:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 389 transitions. [2020-08-22 23:09:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2020-08-22 23:09:33,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:09:33,943 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:09:33,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-08-22 23:09:33,943 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:09:33,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:09:33,943 INFO L82 PathProgramCache]: Analyzing trace with hash -899009834, now seen corresponding path program 42 times [2020-08-22 23:09:33,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:09:33,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946323118] [2020-08-22 23:09:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:09:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:36,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:09:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 41 proven. 7462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:09:36,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946323118] [2020-08-22 23:09:36,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:09:36,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-22 23:09:36,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506417240] [2020-08-22 23:09:36,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-22 23:09:36,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:09:36,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-22 23:09:36,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 23:09:36,290 INFO L87 Difference]: Start difference. First operand 388 states and 389 transitions. Second operand 45 states. [2020-08-22 23:09:39,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:09:39,602 INFO L93 Difference]: Finished difference Result 412 states and 414 transitions. [2020-08-22 23:09:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-08-22 23:09:39,604 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 384 [2020-08-22 23:09:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:09:39,607 INFO L225 Difference]: With dead ends: 412 [2020-08-22 23:09:39,607 INFO L226 Difference]: Without dead ends: 404 [2020-08-22 23:09:39,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 23:09:39,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-22 23:09:39,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 394. [2020-08-22 23:09:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-08-22 23:09:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 395 transitions. [2020-08-22 23:09:39,694 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 395 transitions. Word has length 384 [2020-08-22 23:09:39,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:09:39,694 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 395 transitions. [2020-08-22 23:09:39,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-22 23:09:39,694 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 395 transitions. [2020-08-22 23:09:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-08-22 23:09:39,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:09:39,696 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:09:39,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-08-22 23:09:39,697 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:09:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:09:39,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2038365351, now seen corresponding path program 40 times [2020-08-22 23:09:39,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:09:39,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325867232] [2020-08-22 23:09:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:09:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:46,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:09:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7585 backedges. 0 proven. 7585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:09:47,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325867232] [2020-08-22 23:09:47,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:09:47,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-08-22 23:09:47,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548343] [2020-08-22 23:09:47,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-08-22 23:09:47,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:09:47,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-08-22 23:09:47,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=7270, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 23:09:47,206 INFO L87 Difference]: Start difference. First operand 394 states and 395 transitions. Second operand 87 states. [2020-08-22 23:10:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:10:06,410 INFO L93 Difference]: Finished difference Result 407 states and 408 transitions. [2020-08-22 23:10:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-08-22 23:10:06,413 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 386 [2020-08-22 23:10:06,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:10:06,415 INFO L225 Difference]: With dead ends: 407 [2020-08-22 23:10:06,416 INFO L226 Difference]: Without dead ends: 400 [2020-08-22 23:10:06,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7846 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=612, Invalid=27110, Unknown=0, NotChecked=0, Total=27722 [2020-08-22 23:10:06,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-08-22 23:10:06,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 397. [2020-08-22 23:10:06,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-08-22 23:10:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 398 transitions. [2020-08-22 23:10:06,531 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 398 transitions. Word has length 386 [2020-08-22 23:10:06,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:10:06,532 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 398 transitions. [2020-08-22 23:10:06,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-08-22 23:10:06,532 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 398 transitions. [2020-08-22 23:10:06,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-08-22 23:10:06,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:10:06,534 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:10:06,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-08-22 23:10:06,534 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:10:06,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:10:06,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1238183808, now seen corresponding path program 43 times [2020-08-22 23:10:06,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:10:06,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866093230] [2020-08-22 23:10:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:10:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:09,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:10:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 42 proven. 7833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:10:09,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866093230] [2020-08-22 23:10:09,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:10:09,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-22 23:10:09,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373829239] [2020-08-22 23:10:09,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 23:10:09,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:10:09,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 23:10:09,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 23:10:09,106 INFO L87 Difference]: Start difference. First operand 397 states and 398 transitions. Second operand 46 states. [2020-08-22 23:10:12,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:10:12,840 INFO L93 Difference]: Finished difference Result 421 states and 423 transitions. [2020-08-22 23:10:12,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-08-22 23:10:12,842 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 393 [2020-08-22 23:10:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:10:12,845 INFO L225 Difference]: With dead ends: 421 [2020-08-22 23:10:12,845 INFO L226 Difference]: Without dead ends: 413 [2020-08-22 23:10:12,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-08-22 23:10:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-08-22 23:10:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 403. [2020-08-22 23:10:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-08-22 23:10:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-08-22 23:10:12,940 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 393 [2020-08-22 23:10:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:10:12,941 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-08-22 23:10:12,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 23:10:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-08-22 23:10:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-08-22 23:10:12,942 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:10:12,943 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:10:12,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-08-22 23:10:12,943 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:10:12,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:10:12,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1189642877, now seen corresponding path program 41 times [2020-08-22 23:10:12,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:10:12,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746078468] [2020-08-22 23:10:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:10:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:21,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:10:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7959 backedges. 0 proven. 7959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:10:21,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746078468] [2020-08-22 23:10:21,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:10:21,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-08-22 23:10:21,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345976604] [2020-08-22 23:10:21,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-08-22 23:10:21,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:10:21,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-08-22 23:10:21,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=7615, Unknown=0, NotChecked=0, Total=7832 [2020-08-22 23:10:21,549 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 89 states. [2020-08-22 23:10:36,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:10:36,389 INFO L93 Difference]: Finished difference Result 416 states and 417 transitions. [2020-08-22 23:10:36,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-08-22 23:10:36,392 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 395 [2020-08-22 23:10:36,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:10:36,395 INFO L225 Difference]: With dead ends: 416 [2020-08-22 23:10:36,395 INFO L226 Difference]: Without dead ends: 409 [2020-08-22 23:10:36,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8247 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=627, Invalid=28443, Unknown=0, NotChecked=0, Total=29070 [2020-08-22 23:10:36,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-08-22 23:10:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 406. [2020-08-22 23:10:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-08-22 23:10:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 407 transitions. [2020-08-22 23:10:36,507 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 407 transitions. Word has length 395 [2020-08-22 23:10:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:10:36,507 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 407 transitions. [2020-08-22 23:10:36,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-08-22 23:10:36,507 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 407 transitions. [2020-08-22 23:10:36,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-08-22 23:10:36,509 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:10:36,509 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:10:36,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-08-22 23:10:36,509 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:10:36,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:10:36,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2093666838, now seen corresponding path program 44 times [2020-08-22 23:10:36,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:10:36,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537759812] [2020-08-22 23:10:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:10:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:39,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:10:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 43 proven. 8213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:10:39,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537759812] [2020-08-22 23:10:39,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:10:39,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-22 23:10:39,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158379908] [2020-08-22 23:10:39,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-22 23:10:39,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:10:39,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-22 23:10:39,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 23:10:39,423 INFO L87 Difference]: Start difference. First operand 406 states and 407 transitions. Second operand 47 states. [2020-08-22 23:10:43,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:10:43,611 INFO L93 Difference]: Finished difference Result 430 states and 432 transitions. [2020-08-22 23:10:43,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-08-22 23:10:43,614 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 402 [2020-08-22 23:10:43,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:10:43,616 INFO L225 Difference]: With dead ends: 430 [2020-08-22 23:10:43,616 INFO L226 Difference]: Without dead ends: 422 [2020-08-22 23:10:43,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-08-22 23:10:43,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-08-22 23:10:43,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2020-08-22 23:10:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-08-22 23:10:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 413 transitions. [2020-08-22 23:10:43,714 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 413 transitions. Word has length 402 [2020-08-22 23:10:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:10:43,715 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 413 transitions. [2020-08-22 23:10:43,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-22 23:10:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 413 transitions. [2020-08-22 23:10:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2020-08-22 23:10:43,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:10:43,717 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:10:43,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-08-22 23:10:43,717 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:10:43,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:10:43,717 INFO L82 PathProgramCache]: Analyzing trace with hash 590795417, now seen corresponding path program 42 times [2020-08-22 23:10:43,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:10:43,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625125541] [2020-08-22 23:10:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:10:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:53,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:10:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8342 backedges. 0 proven. 8342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:10:53,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625125541] [2020-08-22 23:10:53,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:10:53,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2020-08-22 23:10:53,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068145488] [2020-08-22 23:10:53,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-08-22 23:10:53,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:10:53,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-08-22 23:10:53,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=7968, Unknown=0, NotChecked=0, Total=8190 [2020-08-22 23:10:53,273 INFO L87 Difference]: Start difference. First operand 412 states and 413 transitions. Second operand 91 states. [2020-08-22 23:11:10,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:11:10,133 INFO L93 Difference]: Finished difference Result 425 states and 426 transitions. [2020-08-22 23:11:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-08-22 23:11:10,136 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 404 [2020-08-22 23:11:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:11:10,139 INFO L225 Difference]: With dead ends: 425 [2020-08-22 23:11:10,139 INFO L226 Difference]: Without dead ends: 418 [2020-08-22 23:11:10,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8658 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=642, Invalid=29808, Unknown=0, NotChecked=0, Total=30450 [2020-08-22 23:11:10,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-22 23:11:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 415. [2020-08-22 23:11:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-08-22 23:11:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 416 transitions. [2020-08-22 23:11:10,258 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 416 transitions. Word has length 404 [2020-08-22 23:11:10,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:11:10,258 INFO L479 AbstractCegarLoop]: Abstraction has 415 states and 416 transitions. [2020-08-22 23:11:10,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-08-22 23:11:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 416 transitions. [2020-08-22 23:11:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-08-22 23:11:10,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:11:10,260 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:11:10,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-08-22 23:11:10,260 INFO L427 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:11:10,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:11:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash -217335744, now seen corresponding path program 45 times [2020-08-22 23:11:10,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:11:10,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974063545] [2020-08-22 23:11:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:11:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:13,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:11:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 44 proven. 8602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:11:13,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974063545] [2020-08-22 23:11:13,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:11:13,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-22 23:11:13,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948633293] [2020-08-22 23:11:13,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 23:11:13,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:11:13,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 23:11:13,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 23:11:13,514 INFO L87 Difference]: Start difference. First operand 415 states and 416 transitions. Second operand 48 states. [2020-08-22 23:11:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:11:18,059 INFO L93 Difference]: Finished difference Result 439 states and 441 transitions. [2020-08-22 23:11:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-08-22 23:11:18,062 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 411 [2020-08-22 23:11:18,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:11:18,065 INFO L225 Difference]: With dead ends: 439 [2020-08-22 23:11:18,065 INFO L226 Difference]: Without dead ends: 431 [2020-08-22 23:11:18,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-08-22 23:11:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-08-22 23:11:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 421. [2020-08-22 23:11:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-08-22 23:11:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 422 transitions. [2020-08-22 23:11:18,167 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 422 transitions. Word has length 411 [2020-08-22 23:11:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:11:18,167 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 422 transitions. [2020-08-22 23:11:18,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 23:11:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 422 transitions. [2020-08-22 23:11:18,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-08-22 23:11:18,169 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:11:18,169 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:11:18,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-08-22 23:11:18,169 INFO L427 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:11:18,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:11:18,170 INFO L82 PathProgramCache]: Analyzing trace with hash 215406147, now seen corresponding path program 43 times [2020-08-22 23:11:18,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:11:18,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180569841] [2020-08-22 23:11:18,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:11:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:28,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:11:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8734 backedges. 0 proven. 8734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:11:28,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180569841] [2020-08-22 23:11:28,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:11:28,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-08-22 23:11:28,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003521634] [2020-08-22 23:11:28,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-08-22 23:11:28,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:11:28,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-08-22 23:11:28,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=8329, Unknown=0, NotChecked=0, Total=8556 [2020-08-22 23:11:28,574 INFO L87 Difference]: Start difference. First operand 421 states and 422 transitions. Second operand 93 states. [2020-08-22 23:11:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:11:56,087 INFO L93 Difference]: Finished difference Result 434 states and 435 transitions. [2020-08-22 23:11:56,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-08-22 23:11:56,090 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 413 [2020-08-22 23:11:56,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:11:56,093 INFO L225 Difference]: With dead ends: 434 [2020-08-22 23:11:56,093 INFO L226 Difference]: Without dead ends: 427 [2020-08-22 23:11:56,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9079 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=657, Invalid=31205, Unknown=0, NotChecked=0, Total=31862 [2020-08-22 23:11:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-08-22 23:11:56,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 424. [2020-08-22 23:11:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-08-22 23:11:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 425 transitions. [2020-08-22 23:11:56,200 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 425 transitions. Word has length 413 [2020-08-22 23:11:56,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:11:56,201 INFO L479 AbstractCegarLoop]: Abstraction has 424 states and 425 transitions. [2020-08-22 23:11:56,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-08-22 23:11:56,201 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 425 transitions. [2020-08-22 23:11:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-08-22 23:11:56,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:11:56,203 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:11:56,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-08-22 23:11:56,203 INFO L427 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:11:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:11:56,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1803935402, now seen corresponding path program 46 times [2020-08-22 23:11:56,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:11:56,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981802630] [2020-08-22 23:11:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:11:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:59,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:11:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 45 proven. 9000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:11:59,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981802630] [2020-08-22 23:11:59,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:11:59,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-22 23:11:59,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393735826] [2020-08-22 23:11:59,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-22 23:11:59,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:11:59,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-22 23:11:59,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 23:11:59,824 INFO L87 Difference]: Start difference. First operand 424 states and 425 transitions. Second operand 49 states. [2020-08-22 23:12:05,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:12:05,028 INFO L93 Difference]: Finished difference Result 448 states and 450 transitions. [2020-08-22 23:12:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-08-22 23:12:05,031 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 420 [2020-08-22 23:12:05,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:12:05,034 INFO L225 Difference]: With dead ends: 448 [2020-08-22 23:12:05,034 INFO L226 Difference]: Without dead ends: 440 [2020-08-22 23:12:05,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-08-22 23:12:05,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-08-22 23:12:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 430. [2020-08-22 23:12:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-08-22 23:12:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 431 transitions. [2020-08-22 23:12:05,137 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 431 transitions. Word has length 420 [2020-08-22 23:12:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:12:05,137 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 431 transitions. [2020-08-22 23:12:05,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-22 23:12:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 431 transitions. [2020-08-22 23:12:05,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-08-22 23:12:05,139 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:12:05,139 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:12:05,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-08-22 23:12:05,140 INFO L427 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:12:05,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:12:05,140 INFO L82 PathProgramCache]: Analyzing trace with hash 206524889, now seen corresponding path program 44 times [2020-08-22 23:12:05,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:12:05,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762373232] [2020-08-22 23:12:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:12:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:16,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:12:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9135 backedges. 0 proven. 9135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:12:16,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762373232] [2020-08-22 23:12:16,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:12:16,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2020-08-22 23:12:16,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796028154] [2020-08-22 23:12:16,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-08-22 23:12:16,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:12:16,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-08-22 23:12:16,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=8698, Unknown=0, NotChecked=0, Total=8930 [2020-08-22 23:12:16,686 INFO L87 Difference]: Start difference. First operand 430 states and 431 transitions. Second operand 95 states. [2020-08-22 23:12:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:12:48,335 INFO L93 Difference]: Finished difference Result 443 states and 444 transitions. [2020-08-22 23:12:48,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-08-22 23:12:48,338 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 422 [2020-08-22 23:12:48,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:12:48,341 INFO L225 Difference]: With dead ends: 443 [2020-08-22 23:12:48,341 INFO L226 Difference]: Without dead ends: 436 [2020-08-22 23:12:48,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9510 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=672, Invalid=32634, Unknown=0, NotChecked=0, Total=33306 [2020-08-22 23:12:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-08-22 23:12:48,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 433. [2020-08-22 23:12:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-08-22 23:12:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 434 transitions. [2020-08-22 23:12:48,448 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 434 transitions. Word has length 422 [2020-08-22 23:12:48,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:12:48,448 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 434 transitions. [2020-08-22 23:12:48,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-08-22 23:12:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 434 transitions. [2020-08-22 23:12:48,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-08-22 23:12:48,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:12:48,450 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:12:48,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-08-22 23:12:48,450 INFO L427 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:12:48,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:12:48,451 INFO L82 PathProgramCache]: Analyzing trace with hash -863923968, now seen corresponding path program 47 times [2020-08-22 23:12:48,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:12:48,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634170948] [2020-08-22 23:12:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:12:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:52,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:12:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 46 proven. 9407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:12:52,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634170948] [2020-08-22 23:12:52,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:12:52,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-22 23:12:52,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187887586] [2020-08-22 23:12:52,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-22 23:12:52,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:12:52,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-22 23:12:52,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 23:12:52,561 INFO L87 Difference]: Start difference. First operand 433 states and 434 transitions. Second operand 50 states. [2020-08-22 23:12:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:12:58,347 INFO L93 Difference]: Finished difference Result 457 states and 459 transitions. [2020-08-22 23:12:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-08-22 23:12:58,351 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 429 [2020-08-22 23:12:58,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:12:58,353 INFO L225 Difference]: With dead ends: 457 [2020-08-22 23:12:58,353 INFO L226 Difference]: Without dead ends: 449 [2020-08-22 23:12:58,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-08-22 23:12:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-22 23:12:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 439. [2020-08-22 23:12:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-08-22 23:12:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 440 transitions. [2020-08-22 23:12:58,461 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 440 transitions. Word has length 429 [2020-08-22 23:12:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:12:58,462 INFO L479 AbstractCegarLoop]: Abstraction has 439 states and 440 transitions. [2020-08-22 23:12:58,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-22 23:12:58,462 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 440 transitions. [2020-08-22 23:12:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-08-22 23:12:58,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:12:58,464 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:12:58,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2020-08-22 23:12:58,464 INFO L427 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:12:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:12:58,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1614380803, now seen corresponding path program 45 times [2020-08-22 23:12:58,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:12:58,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94853823] [2020-08-22 23:12:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:12:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:11,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:13:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9545 backedges. 0 proven. 9545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:13:11,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94853823] [2020-08-22 23:13:11,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:13:11,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-08-22 23:13:11,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621223688] [2020-08-22 23:13:11,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-08-22 23:13:11,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:13:11,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-08-22 23:13:11,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=9075, Unknown=0, NotChecked=0, Total=9312 [2020-08-22 23:13:11,371 INFO L87 Difference]: Start difference. First operand 439 states and 440 transitions. Second operand 97 states. [2020-08-22 23:13:35,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:13:35,846 INFO L93 Difference]: Finished difference Result 452 states and 453 transitions. [2020-08-22 23:13:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-08-22 23:13:35,850 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 431 [2020-08-22 23:13:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:13:35,853 INFO L225 Difference]: With dead ends: 452 [2020-08-22 23:13:35,853 INFO L226 Difference]: Without dead ends: 445 [2020-08-22 23:13:35,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9951 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=687, Invalid=34095, Unknown=0, NotChecked=0, Total=34782 [2020-08-22 23:13:35,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-08-22 23:13:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 442. [2020-08-22 23:13:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-08-22 23:13:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 443 transitions. [2020-08-22 23:13:35,969 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 443 transitions. Word has length 431 [2020-08-22 23:13:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:13:35,969 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 443 transitions. [2020-08-22 23:13:35,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-08-22 23:13:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 443 transitions. [2020-08-22 23:13:35,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-08-22 23:13:35,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:13:35,971 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:13:35,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2020-08-22 23:13:35,972 INFO L427 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:13:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:13:35,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1121181546, now seen corresponding path program 48 times [2020-08-22 23:13:35,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:13:35,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550738143] [2020-08-22 23:13:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:13:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:13:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 47 proven. 9823 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:13:40,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550738143] [2020-08-22 23:13:40,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:13:40,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-22 23:13:40,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044358800] [2020-08-22 23:13:40,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-22 23:13:40,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:13:40,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-22 23:13:40,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 23:13:40,630 INFO L87 Difference]: Start difference. First operand 442 states and 443 transitions. Second operand 51 states. [2020-08-22 23:13:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:13:47,206 INFO L93 Difference]: Finished difference Result 466 states and 468 transitions. [2020-08-22 23:13:47,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-08-22 23:13:47,210 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 438 [2020-08-22 23:13:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:13:47,213 INFO L225 Difference]: With dead ends: 466 [2020-08-22 23:13:47,214 INFO L226 Difference]: Without dead ends: 458 [2020-08-22 23:13:47,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-08-22 23:13:47,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-22 23:13:47,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 448. [2020-08-22 23:13:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-22 23:13:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 449 transitions. [2020-08-22 23:13:47,327 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 449 transitions. Word has length 438 [2020-08-22 23:13:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:13:47,328 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 449 transitions. [2020-08-22 23:13:47,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-22 23:13:47,328 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 449 transitions. [2020-08-22 23:13:47,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2020-08-22 23:13:47,330 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:13:47,331 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:13:47,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-08-22 23:13:47,331 INFO L427 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:13:47,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:13:47,331 INFO L82 PathProgramCache]: Analyzing trace with hash -797015783, now seen corresponding path program 46 times [2020-08-22 23:13:47,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:13:47,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654099299] [2020-08-22 23:13:47,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:13:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:01,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9964 backedges. 0 proven. 9964 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:01,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654099299] [2020-08-22 23:14:01,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:01,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2020-08-22 23:14:01,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064723690] [2020-08-22 23:14:01,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-08-22 23:14:01,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:01,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-08-22 23:14:01,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=9460, Unknown=0, NotChecked=0, Total=9702 [2020-08-22 23:14:01,882 INFO L87 Difference]: Start difference. First operand 448 states and 449 transitions. Second operand 99 states. [2020-08-22 23:14:29,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:29,637 INFO L93 Difference]: Finished difference Result 461 states and 462 transitions. [2020-08-22 23:14:29,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-08-22 23:14:29,642 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 440 [2020-08-22 23:14:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:29,645 INFO L225 Difference]: With dead ends: 461 [2020-08-22 23:14:29,645 INFO L226 Difference]: Without dead ends: 454 [2020-08-22 23:14:29,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10402 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=702, Invalid=35588, Unknown=0, NotChecked=0, Total=36290 [2020-08-22 23:14:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-08-22 23:14:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 451. [2020-08-22 23:14:29,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-08-22 23:14:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 452 transitions. [2020-08-22 23:14:29,793 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 452 transitions. Word has length 440 [2020-08-22 23:14:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:29,793 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 452 transitions. [2020-08-22 23:14:29,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-08-22 23:14:29,793 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 452 transitions. [2020-08-22 23:14:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-08-22 23:14:29,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:29,796 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:29,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2020-08-22 23:14:29,796 INFO L427 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:29,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:29,796 INFO L82 PathProgramCache]: Analyzing trace with hash 351975872, now seen corresponding path program 49 times [2020-08-22 23:14:29,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:29,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483543421] [2020-08-22 23:14:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:34,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 48 proven. 10248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:35,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483543421] [2020-08-22 23:14:35,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:35,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-08-22 23:14:35,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618187065] [2020-08-22 23:14:35,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 23:14:35,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:35,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 23:14:35,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 23:14:35,057 INFO L87 Difference]: Start difference. First operand 451 states and 452 transitions. Second operand 52 states. [2020-08-22 23:14:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:42,636 INFO L93 Difference]: Finished difference Result 475 states and 477 transitions. [2020-08-22 23:14:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-08-22 23:14:42,641 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 447 [2020-08-22 23:14:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:42,644 INFO L225 Difference]: With dead ends: 475 [2020-08-22 23:14:42,644 INFO L226 Difference]: Without dead ends: 467 [2020-08-22 23:14:42,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-08-22 23:14:42,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-08-22 23:14:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 457. [2020-08-22 23:14:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-08-22 23:14:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 458 transitions. [2020-08-22 23:14:42,763 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 458 transitions. Word has length 447 [2020-08-22 23:14:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:42,764 INFO L479 AbstractCegarLoop]: Abstraction has 457 states and 458 transitions. [2020-08-22 23:14:42,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 23:14:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 458 transitions. [2020-08-22 23:14:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-08-22 23:14:42,766 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:42,766 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:42,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-08-22 23:14:42,766 INFO L427 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:42,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:42,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1863022531, now seen corresponding path program 47 times [2020-08-22 23:14:42,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:42,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289750392] [2020-08-22 23:14:42,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:59,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10392 backedges. 0 proven. 10392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:59,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289750392] [2020-08-22 23:14:59,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:59,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2020-08-22 23:14:59,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709537151] [2020-08-22 23:14:59,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-08-22 23:14:59,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:59,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-08-22 23:14:59,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=9853, Unknown=0, NotChecked=0, Total=10100 [2020-08-22 23:14:59,298 INFO L87 Difference]: Start difference. First operand 457 states and 458 transitions. Second operand 101 states. [2020-08-22 23:15:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:43,477 INFO L93 Difference]: Finished difference Result 470 states and 471 transitions. [2020-08-22 23:15:43,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-08-22 23:15:43,481 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 449 [2020-08-22 23:15:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:43,484 INFO L225 Difference]: With dead ends: 470 [2020-08-22 23:15:43,484 INFO L226 Difference]: Without dead ends: 463 [2020-08-22 23:15:43,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10863 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=717, Invalid=37113, Unknown=0, NotChecked=0, Total=37830 [2020-08-22 23:15:43,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-08-22 23:15:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 460. [2020-08-22 23:15:43,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-08-22 23:15:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 461 transitions. [2020-08-22 23:15:43,608 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 461 transitions. Word has length 449 [2020-08-22 23:15:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:43,608 INFO L479 AbstractCegarLoop]: Abstraction has 460 states and 461 transitions. [2020-08-22 23:15:43,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-08-22 23:15:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 461 transitions. [2020-08-22 23:15:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-08-22 23:15:43,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:43,610 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:15:43,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2020-08-22 23:15:43,611 INFO L427 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:43,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1651191850, now seen corresponding path program 50 times [2020-08-22 23:15:43,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:43,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058650959] [2020-08-22 23:15:43,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:48,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 49 proven. 10682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:49,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058650959] [2020-08-22 23:15:49,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:49,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-22 23:15:49,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86754842] [2020-08-22 23:15:49,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-22 23:15:49,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:49,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-22 23:15:49,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 23:15:49,057 INFO L87 Difference]: Start difference. First operand 460 states and 461 transitions. Second operand 53 states. [2020-08-22 23:15:56,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:56,670 INFO L93 Difference]: Finished difference Result 484 states and 486 transitions. [2020-08-22 23:15:56,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-08-22 23:15:56,674 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 456 [2020-08-22 23:15:56,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:56,677 INFO L225 Difference]: With dead ends: 484 [2020-08-22 23:15:56,677 INFO L226 Difference]: Without dead ends: 476 [2020-08-22 23:15:56,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-08-22 23:15:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-08-22 23:15:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 466. [2020-08-22 23:15:56,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-08-22 23:15:56,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 467 transitions. [2020-08-22 23:15:56,802 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 467 transitions. Word has length 456 [2020-08-22 23:15:56,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:56,803 INFO L479 AbstractCegarLoop]: Abstraction has 466 states and 467 transitions. [2020-08-22 23:15:56,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-22 23:15:56,803 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 467 transitions. [2020-08-22 23:15:56,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-08-22 23:15:56,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:56,805 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:15:56,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2020-08-22 23:15:56,806 INFO L427 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:56,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:56,806 INFO L82 PathProgramCache]: Analyzing trace with hash 964190297, now seen corresponding path program 48 times [2020-08-22 23:15:56,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:56,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987632715] [2020-08-22 23:15:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:16:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10829 backedges. 0 proven. 10829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:16:13,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987632715] [2020-08-22 23:16:13,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:16:13,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2020-08-22 23:16:13,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424573717] [2020-08-22 23:16:13,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-08-22 23:16:13,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:16:13,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-08-22 23:16:13,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=10254, Unknown=0, NotChecked=0, Total=10506 [2020-08-22 23:16:13,305 INFO L87 Difference]: Start difference. First operand 466 states and 467 transitions. Second operand 103 states. [2020-08-22 23:16:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:16:59,196 INFO L93 Difference]: Finished difference Result 479 states and 480 transitions. [2020-08-22 23:16:59,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-08-22 23:16:59,201 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 458 [2020-08-22 23:16:59,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:16:59,204 INFO L225 Difference]: With dead ends: 479 [2020-08-22 23:16:59,204 INFO L226 Difference]: Without dead ends: 472 [2020-08-22 23:16:59,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11334 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=732, Invalid=38670, Unknown=0, NotChecked=0, Total=39402 [2020-08-22 23:16:59,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-22 23:16:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 469. [2020-08-22 23:16:59,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-08-22 23:16:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 470 transitions. [2020-08-22 23:16:59,353 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 470 transitions. Word has length 458 [2020-08-22 23:16:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:16:59,354 INFO L479 AbstractCegarLoop]: Abstraction has 469 states and 470 transitions. [2020-08-22 23:16:59,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-08-22 23:16:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 470 transitions. [2020-08-22 23:16:59,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-08-22 23:16:59,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:16:59,357 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:16:59,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2020-08-22 23:16:59,357 INFO L427 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:16:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:16:59,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1883452032, now seen corresponding path program 51 times [2020-08-22 23:16:59,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:16:59,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646467134] [2020-08-22 23:16:59,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:16:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:04,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:17:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 50 proven. 11125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:17:05,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646467134] [2020-08-22 23:17:05,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:17:05,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-08-22 23:17:05,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484530962] [2020-08-22 23:17:05,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-22 23:17:05,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:17:05,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-22 23:17:05,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 23:17:05,115 INFO L87 Difference]: Start difference. First operand 469 states and 470 transitions. Second operand 54 states. [2020-08-22 23:17:13,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:17:13,015 INFO L93 Difference]: Finished difference Result 493 states and 495 transitions. [2020-08-22 23:17:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-08-22 23:17:13,020 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 465 [2020-08-22 23:17:13,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:17:13,023 INFO L225 Difference]: With dead ends: 493 [2020-08-22 23:17:13,023 INFO L226 Difference]: Without dead ends: 485 [2020-08-22 23:17:13,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-08-22 23:17:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-08-22 23:17:13,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 475. [2020-08-22 23:17:13,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-08-22 23:17:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 476 transitions. [2020-08-22 23:17:13,151 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 476 transitions. Word has length 465 [2020-08-22 23:17:13,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:17:13,152 INFO L479 AbstractCegarLoop]: Abstraction has 475 states and 476 transitions. [2020-08-22 23:17:13,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-22 23:17:13,152 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 476 transitions. [2020-08-22 23:17:13,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-08-22 23:17:13,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:17:13,154 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:17:13,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2020-08-22 23:17:13,154 INFO L427 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:17:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:17:13,154 INFO L82 PathProgramCache]: Analyzing trace with hash 437829763, now seen corresponding path program 49 times [2020-08-22 23:17:13,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:17:13,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281620845] [2020-08-22 23:17:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:17:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:30,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:17:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11275 backedges. 0 proven. 11275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:17:30,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281620845] [2020-08-22 23:17:30,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:17:30,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2020-08-22 23:17:30,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506341943] [2020-08-22 23:17:30,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-08-22 23:17:30,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:17:30,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-08-22 23:17:30,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=10663, Unknown=0, NotChecked=0, Total=10920 [2020-08-22 23:17:30,963 INFO L87 Difference]: Start difference. First operand 475 states and 476 transitions. Second operand 105 states. [2020-08-22 23:18:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:18:04,875 INFO L93 Difference]: Finished difference Result 488 states and 489 transitions. [2020-08-22 23:18:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-08-22 23:18:04,880 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 467 [2020-08-22 23:18:04,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:18:04,883 INFO L225 Difference]: With dead ends: 488 [2020-08-22 23:18:04,883 INFO L226 Difference]: Without dead ends: 481 [2020-08-22 23:18:04,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11815 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=747, Invalid=40259, Unknown=0, NotChecked=0, Total=41006 [2020-08-22 23:18:04,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-08-22 23:18:05,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 478. [2020-08-22 23:18:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-08-22 23:18:05,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 479 transitions. [2020-08-22 23:18:05,079 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 479 transitions. Word has length 467 [2020-08-22 23:18:05,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:18:05,079 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 479 transitions. [2020-08-22 23:18:05,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 105 states. [2020-08-22 23:18:05,079 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 479 transitions. [2020-08-22 23:18:05,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-08-22 23:18:05,081 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:18:05,081 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:18:05,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2020-08-22 23:18:05,082 INFO L427 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:18:05,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:18:05,082 INFO L82 PathProgramCache]: Analyzing trace with hash 392703766, now seen corresponding path program 52 times [2020-08-22 23:18:05,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:18:05,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015096672] [2020-08-22 23:18:05,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:18:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:18:11,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:18:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:18:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 51 proven. 11577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:18:11,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015096672] [2020-08-22 23:18:11,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:18:11,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-22 23:18:11,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657121232] [2020-08-22 23:18:11,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-22 23:18:11,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:18:11,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-22 23:18:11,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 23:18:11,575 INFO L87 Difference]: Start difference. First operand 478 states and 479 transitions. Second operand 55 states. [2020-08-22 23:18:20,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:18:20,424 INFO L93 Difference]: Finished difference Result 502 states and 504 transitions. [2020-08-22 23:18:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-08-22 23:18:20,430 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 474 [2020-08-22 23:18:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:18:20,432 INFO L225 Difference]: With dead ends: 502 [2020-08-22 23:18:20,432 INFO L226 Difference]: Without dead ends: 494 [2020-08-22 23:18:20,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-08-22 23:18:20,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2020-08-22 23:18:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 484. [2020-08-22 23:18:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-08-22 23:18:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 485 transitions. [2020-08-22 23:18:20,565 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 485 transitions. Word has length 474 [2020-08-22 23:18:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:18:20,566 INFO L479 AbstractCegarLoop]: Abstraction has 484 states and 485 transitions. [2020-08-22 23:18:20,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-22 23:18:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 485 transitions. [2020-08-22 23:18:20,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 23:18:20,567 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:18:20,568 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:18:20,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2020-08-22 23:18:20,568 INFO L427 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:18:20,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:18:20,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1947144295, now seen corresponding path program 50 times [2020-08-22 23:18:20,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:18:20,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513422743] [2020-08-22 23:18:20,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:18:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:18:37,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:18:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:18:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11730 backedges. 0 proven. 11730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:18:38,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513422743] [2020-08-22 23:18:38,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:18:38,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2020-08-22 23:18:38,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149924790] [2020-08-22 23:18:38,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2020-08-22 23:18:38,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:18:38,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2020-08-22 23:18:38,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=11080, Unknown=0, NotChecked=0, Total=11342 [2020-08-22 23:18:38,085 INFO L87 Difference]: Start difference. First operand 484 states and 485 transitions. Second operand 107 states.