/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-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:02:03,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:02:03,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:02:03,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:02:03,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:02:03,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:02:03,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:02:03,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:02:03,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:02:03,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:02:03,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:02:03,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:02:03,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:02:03,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:02:03,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:02:03,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:02:03,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:02:03,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:02:03,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:02:03,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:02:03,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:02:03,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:02:03,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:02:03,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:02:03,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:02:03,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:02:03,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:02:03,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:02:03,180 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 23:02:03,196 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:02:03,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:02:03,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:02:03,198 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:02:03,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:02:03,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:02:03,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:02:03,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:02:03,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:02:03,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:02:03,200 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:02:03,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:02:03,200 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:02:03,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:02:03,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:02:03,201 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:02:03,201 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:02:03,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:02:03,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:02:03,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:02:03,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:02:03,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:02:03,204 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 23:02:03,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:02:03,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:02:03,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:02:03,538 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:02:03,538 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:02:03,539 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-08-22 23:02:03,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce9399ddc/0f4a4561650f4b18bbbe7a8aa0633366/FLAG43926df08 [2020-08-22 23:02:04,069 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:02:04,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-08-22 23:02:04,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce9399ddc/0f4a4561650f4b18bbbe7a8aa0633366/FLAG43926df08 [2020-08-22 23:02:04,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce9399ddc/0f4a4561650f4b18bbbe7a8aa0633366 [2020-08-22 23:02:04,461 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:02:04,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:02:04,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:02:04,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:02:04,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:02:04,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:02:04" (1/1) ... [2020-08-22 23:02:04,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@456593db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:04, skipping insertion in model container [2020-08-22 23:02:04,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:02:04" (1/1) ... [2020-08-22 23:02:04,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:02:04,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:02:04,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:02:04,681 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:02:04,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:02:04,721 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:02:04,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:04 WrapperNode [2020-08-22 23:02:04,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:02:04,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:02:04,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:02:04,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:02:04,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:04" (1/1) ... [2020-08-22 23:02:04,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:04" (1/1) ... [2020-08-22 23:02:04,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:04" (1/1) ... [2020-08-22 23:02:04,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:04" (1/1) ... [2020-08-22 23:02:04,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:04" (1/1) ... [2020-08-22 23:02:04,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:04" (1/1) ... [2020-08-22 23:02:04,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:04" (1/1) ... [2020-08-22 23:02:04,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:02:04,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:02:04,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:02:04,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:02:04,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:04" (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 23:02:04,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:02:04,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:02:04,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:02:04,919 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:02:04,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:02:04,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:02:04,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:02:04,919 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:02:04,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 23:02:04,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 23:02:04,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 23:02:04,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 23:02:04,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:02:04,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:02:05,195 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:02:05,197 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 23:02:05,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:02:05 BoogieIcfgContainer [2020-08-22 23:02:05,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:02:05,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:02:05,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:02:05,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:02:05,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:02:04" (1/3) ... [2020-08-22 23:02:05,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@465c42b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:02:05, skipping insertion in model container [2020-08-22 23:02:05,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:04" (2/3) ... [2020-08-22 23:02:05,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@465c42b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:02:05, skipping insertion in model container [2020-08-22 23:02:05,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:02:05" (3/3) ... [2020-08-22 23:02:05,227 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-08-22 23:02:05,238 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:02:05,246 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:02:05,261 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:02:05,285 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:02:05,285 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:02:05,285 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:02:05,286 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:02:05,286 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:02:05,286 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:02:05,286 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:02:05,286 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:02:05,304 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-08-22 23:02:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 23:02:05,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:05,318 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 23:02:05,319 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:05,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2145994368, now seen corresponding path program 1 times [2020-08-22 23:02:05,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:05,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435706772] [2020-08-22 23:02:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:05,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:05,569 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 23:02:05,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435706772] [2020-08-22 23:02:05,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:02:05,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:02:05,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890324752] [2020-08-22 23:02:05,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:02:05,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:05,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:02:05,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:02:05,615 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-08-22 23:02:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:05,775 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-08-22 23:02:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:02:05,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 23:02:05,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:05,789 INFO L225 Difference]: With dead ends: 61 [2020-08-22 23:02:05,789 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 23:02:05,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 23:02:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 23:02:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-22 23:02:05,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 23:02:05,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-08-22 23:02:05,844 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-08-22 23:02:05,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:05,844 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-08-22 23:02:05,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:02:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-08-22 23:02:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 23:02:05,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:05,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:05,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:02:05,847 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:05,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2141881988, now seen corresponding path program 1 times [2020-08-22 23:02:05,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:05,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199027256] [2020-08-22 23:02:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:05,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:05,931 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 23:02:05,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199027256] [2020-08-22 23:02:05,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:02:05,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 23:02:05,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426019095] [2020-08-22 23:02:05,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 23:02:05,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:05,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 23:02:05,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 23:02:05,941 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-08-22 23:02:06,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:06,048 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-08-22 23:02:06,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 23:02:06,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-22 23:02:06,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:06,052 INFO L225 Difference]: With dead ends: 59 [2020-08-22 23:02:06,052 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 23:02:06,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 23:02:06,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 23:02:06,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-08-22 23:02:06,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 23:02:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-22 23:02:06,066 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 19 [2020-08-22 23:02:06,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:06,066 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-22 23:02:06,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 23:02:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-22 23:02:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 23:02:06,068 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:06,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:06,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:02:06,069 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:06,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:06,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1000622251, now seen corresponding path program 1 times [2020-08-22 23:02:06,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:06,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789510969] [2020-08-22 23:02:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:06,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:06,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789510969] [2020-08-22 23:02:06,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:06,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 23:02:06,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244423054] [2020-08-22 23:02:06,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:02:06,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:06,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:02:06,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:02:06,164 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2020-08-22 23:02:06,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:06,313 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-08-22 23:02:06,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 23:02:06,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-08-22 23:02:06,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:06,316 INFO L225 Difference]: With dead ends: 70 [2020-08-22 23:02:06,316 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 23:02:06,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:02:06,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 23:02:06,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-08-22 23:02:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 23:02:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-08-22 23:02:06,328 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2020-08-22 23:02:06,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:06,329 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-08-22 23:02:06,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:02:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-08-22 23:02:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 23:02:06,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:06,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:06,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:02:06,332 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:06,332 INFO L82 PathProgramCache]: Analyzing trace with hash 231352676, now seen corresponding path program 2 times [2020-08-22 23:02:06,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:06,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743997260] [2020-08-22 23:02:06,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:06,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:06,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743997260] [2020-08-22 23:02:06,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:06,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 23:02:06,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193954330] [2020-08-22 23:02:06,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 23:02:06,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:06,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 23:02:06,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:02:06,459 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 8 states. [2020-08-22 23:02:06,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:06,627 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-08-22 23:02:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 23:02:06,627 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-22 23:02:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:06,629 INFO L225 Difference]: With dead ends: 77 [2020-08-22 23:02:06,629 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 23:02:06,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:02:06,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 23:02:06,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2020-08-22 23:02:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 23:02:06,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-08-22 23:02:06,641 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 33 [2020-08-22 23:02:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:06,641 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-08-22 23:02:06,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 23:02:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-08-22 23:02:06,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 23:02:06,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:06,643 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:06,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:02:06,643 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:06,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1221138549, now seen corresponding path program 3 times [2020-08-22 23:02:06,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:06,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20578099] [2020-08-22 23:02:06,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:06,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-22 23:02:06,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20578099] [2020-08-22 23:02:06,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:02:06,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 23:02:06,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846851043] [2020-08-22 23:02:06,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:02:06,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:06,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:02:06,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:02:06,724 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 6 states. [2020-08-22 23:02:06,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:06,840 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-08-22 23:02:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:02:06,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-08-22 23:02:06,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:06,842 INFO L225 Difference]: With dead ends: 58 [2020-08-22 23:02:06,842 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 23:02:06,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:02:06,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 23:02:06,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-08-22 23:02:06,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 23:02:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-08-22 23:02:06,852 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 40 [2020-08-22 23:02:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:06,852 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-08-22 23:02:06,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:02:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-08-22 23:02:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 23:02:06,854 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:06,854 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:06,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:02:06,855 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:06,855 INFO L82 PathProgramCache]: Analyzing trace with hash -842063729, now seen corresponding path program 1 times [2020-08-22 23:02:06,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:06,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163626741] [2020-08-22 23:02:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:06,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-22 23:02:06,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163626741] [2020-08-22 23:02:06,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:06,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 23:02:06,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713556435] [2020-08-22 23:02:06,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 23:02:06,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:06,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 23:02:06,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:02:06,949 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 8 states. [2020-08-22 23:02:07,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:07,108 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-08-22 23:02:07,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 23:02:07,109 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-08-22 23:02:07,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:07,110 INFO L225 Difference]: With dead ends: 68 [2020-08-22 23:02:07,110 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 23:02:07,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:02:07,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 23:02:07,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-08-22 23:02:07,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 23:02:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-08-22 23:02:07,121 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 47 [2020-08-22 23:02:07,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:07,121 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-08-22 23:02:07,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 23:02:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-08-22 23:02:07,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 23:02:07,124 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:07,124 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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 23:02:07,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:02:07,125 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:07,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1280223029, now seen corresponding path program 2 times [2020-08-22 23:02:07,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:07,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835212855] [2020-08-22 23:02:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:07,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:07,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835212855] [2020-08-22 23:02:07,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:07,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 23:02:07,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170020369] [2020-08-22 23:02:07,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 23:02:07,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:07,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 23:02:07,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:02:07,266 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 10 states. [2020-08-22 23:02:07,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:07,467 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2020-08-22 23:02:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 23:02:07,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-08-22 23:02:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:07,469 INFO L225 Difference]: With dead ends: 94 [2020-08-22 23:02:07,469 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 23:02:07,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-08-22 23:02:07,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 23:02:07,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-08-22 23:02:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 23:02:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-08-22 23:02:07,478 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 54 [2020-08-22 23:02:07,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:07,479 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-08-22 23:02:07,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 23:02:07,479 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-08-22 23:02:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 23:02:07,480 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:07,480 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 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 23:02:07,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:02:07,481 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:07,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1143766212, now seen corresponding path program 3 times [2020-08-22 23:02:07,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:07,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636929196] [2020-08-22 23:02:07,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:07,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:07,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636929196] [2020-08-22 23:02:07,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:07,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 23:02:07,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263578685] [2020-08-22 23:02:07,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 23:02:07,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:07,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 23:02:07,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:02:07,606 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 12 states. [2020-08-22 23:02:07,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:07,780 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2020-08-22 23:02:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 23:02:07,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-08-22 23:02:07,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:07,782 INFO L225 Difference]: With dead ends: 101 [2020-08-22 23:02:07,782 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 23:02:07,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:02:07,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 23:02:07,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2020-08-22 23:02:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 23:02:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-08-22 23:02:07,792 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 61 [2020-08-22 23:02:07,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:07,792 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-08-22 23:02:07,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 23:02:07,793 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-08-22 23:02:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 23:02:07,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:07,794 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 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 23:02:07,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 23:02:07,794 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:07,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:07,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1966270379, now seen corresponding path program 4 times [2020-08-22 23:02:07,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:07,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780449512] [2020-08-22 23:02:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:07,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:07,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780449512] [2020-08-22 23:02:07,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:07,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 23:02:07,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881886958] [2020-08-22 23:02:07,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 23:02:07,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:07,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 23:02:07,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-22 23:02:07,973 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 14 states. [2020-08-22 23:02:08,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:08,247 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-08-22 23:02:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 23:02:08,248 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-08-22 23:02:08,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:08,249 INFO L225 Difference]: With dead ends: 108 [2020-08-22 23:02:08,250 INFO L226 Difference]: Without dead ends: 83 [2020-08-22 23:02:08,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-08-22 23:02:08,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-08-22 23:02:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-08-22 23:02:08,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 23:02:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-08-22 23:02:08,268 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2020-08-22 23:02:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:08,269 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-08-22 23:02:08,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 23:02:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-08-22 23:02:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 23:02:08,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:08,274 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 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 23:02:08,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 23:02:08,275 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:08,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:08,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1126004828, now seen corresponding path program 5 times [2020-08-22 23:02:08,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:08,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965465933] [2020-08-22 23:02:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:08,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:08,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965465933] [2020-08-22 23:02:08,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:08,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 23:02:08,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954826124] [2020-08-22 23:02:08,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 23:02:08,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:08,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 23:02:08,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-22 23:02:08,459 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 16 states. [2020-08-22 23:02:08,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:08,798 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2020-08-22 23:02:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 23:02:08,799 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-08-22 23:02:08,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:08,800 INFO L225 Difference]: With dead ends: 115 [2020-08-22 23:02:08,800 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 23:02:08,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-08-22 23:02:08,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 23:02:08,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-08-22 23:02:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 23:02:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-08-22 23:02:08,818 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 75 [2020-08-22 23:02:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:08,818 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-08-22 23:02:08,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 23:02:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-08-22 23:02:08,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 23:02:08,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:08,824 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 3, 2, 2, 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 23:02:08,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 23:02:08,825 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:08,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:08,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1440804491, now seen corresponding path program 6 times [2020-08-22 23:02:08,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:08,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107532857] [2020-08-22 23:02:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:09,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:09,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107532857] [2020-08-22 23:02:09,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:09,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 23:02:09,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098573785] [2020-08-22 23:02:09,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 23:02:09,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:09,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 23:02:09,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-22 23:02:09,091 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 18 states. [2020-08-22 23:02:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:09,410 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-08-22 23:02:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 23:02:09,410 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-08-22 23:02:09,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:09,411 INFO L225 Difference]: With dead ends: 122 [2020-08-22 23:02:09,411 INFO L226 Difference]: Without dead ends: 97 [2020-08-22 23:02:09,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-08-22 23:02:09,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-08-22 23:02:09,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2020-08-22 23:02:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-08-22 23:02:09,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-08-22 23:02:09,420 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 82 [2020-08-22 23:02:09,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:09,421 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-08-22 23:02:09,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 23:02:09,421 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-08-22 23:02:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 23:02:09,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:09,422 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 3, 2, 2, 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 23:02:09,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 23:02:09,422 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:09,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:09,423 INFO L82 PathProgramCache]: Analyzing trace with hash -247723388, now seen corresponding path program 7 times [2020-08-22 23:02:09,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:09,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753696158] [2020-08-22 23:02:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:09,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:09,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753696158] [2020-08-22 23:02:09,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:09,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 23:02:09,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479317503] [2020-08-22 23:02:09,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 23:02:09,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:09,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 23:02:09,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:02:09,656 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 20 states. [2020-08-22 23:02:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:10,059 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2020-08-22 23:02:10,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 23:02:10,059 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-08-22 23:02:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:10,060 INFO L225 Difference]: With dead ends: 129 [2020-08-22 23:02:10,060 INFO L226 Difference]: Without dead ends: 104 [2020-08-22 23:02:10,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 23:02:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-22 23:02:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2020-08-22 23:02:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 23:02:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-08-22 23:02:10,075 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 89 [2020-08-22 23:02:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:10,076 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-08-22 23:02:10,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 23:02:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-08-22 23:02:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 23:02:10,079 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:10,079 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 3, 2, 2, 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 23:02:10,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 23:02:10,080 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:10,080 INFO L82 PathProgramCache]: Analyzing trace with hash -847867243, now seen corresponding path program 8 times [2020-08-22 23:02:10,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:10,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606634563] [2020-08-22 23:02:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:10,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:10,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606634563] [2020-08-22 23:02:10,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:10,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 23:02:10,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631171261] [2020-08-22 23:02:10,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 23:02:10,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:10,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 23:02:10,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-08-22 23:02:10,391 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 22 states. [2020-08-22 23:02:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:10,876 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2020-08-22 23:02:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 23:02:10,877 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 96 [2020-08-22 23:02:10,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:10,878 INFO L225 Difference]: With dead ends: 136 [2020-08-22 23:02:10,878 INFO L226 Difference]: Without dead ends: 111 [2020-08-22 23:02:10,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 23:02:10,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-22 23:02:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2020-08-22 23:02:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-22 23:02:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-08-22 23:02:10,892 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 96 [2020-08-22 23:02:10,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:10,893 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-08-22 23:02:10,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 23:02:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-08-22 23:02:10,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 23:02:10,893 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:10,894 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 3, 2, 2, 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 23:02:10,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 23:02:10,894 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:10,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:10,894 INFO L82 PathProgramCache]: Analyzing trace with hash 566691172, now seen corresponding path program 9 times [2020-08-22 23:02:10,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:10,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301068623] [2020-08-22 23:02:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:11,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:11,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301068623] [2020-08-22 23:02:11,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:11,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 23:02:11,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716154564] [2020-08-22 23:02:11,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 23:02:11,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:11,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 23:02:11,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-08-22 23:02:11,187 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 24 states. [2020-08-22 23:02:11,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:11,775 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-08-22 23:02:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 23:02:11,776 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 103 [2020-08-22 23:02:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:11,777 INFO L225 Difference]: With dead ends: 143 [2020-08-22 23:02:11,777 INFO L226 Difference]: Without dead ends: 118 [2020-08-22 23:02:11,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 23:02:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-22 23:02:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-08-22 23:02:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 23:02:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-08-22 23:02:11,787 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 103 [2020-08-22 23:02:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:11,787 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-08-22 23:02:11,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 23:02:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-08-22 23:02:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-22 23:02:11,788 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:11,788 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 3, 2, 2, 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 23:02:11,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 23:02:11,789 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:11,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:11,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1736074315, now seen corresponding path program 10 times [2020-08-22 23:02:11,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:11,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320618703] [2020-08-22 23:02:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:12,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:12,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320618703] [2020-08-22 23:02:12,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:12,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 23:02:12,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391506975] [2020-08-22 23:02:12,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 23:02:12,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:12,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 23:02:12,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-08-22 23:02:12,182 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 26 states. [2020-08-22 23:02:12,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:12,998 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2020-08-22 23:02:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 23:02:12,998 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 110 [2020-08-22 23:02:12,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:13,000 INFO L225 Difference]: With dead ends: 150 [2020-08-22 23:02:13,000 INFO L226 Difference]: Without dead ends: 125 [2020-08-22 23:02:13,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 23:02:13,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-08-22 23:02:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2020-08-22 23:02:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 23:02:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-08-22 23:02:13,009 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 110 [2020-08-22 23:02:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:13,010 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-08-22 23:02:13,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 23:02:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-08-22 23:02:13,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-08-22 23:02:13,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:13,013 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 3, 2, 2, 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 23:02:13,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 23:02:13,014 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:13,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:13,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2123462724, now seen corresponding path program 11 times [2020-08-22 23:02:13,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:13,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027633976] [2020-08-22 23:02:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:13,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:13,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027633976] [2020-08-22 23:02:13,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:13,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 23:02:13,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509621872] [2020-08-22 23:02:13,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 23:02:13,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:13,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 23:02:13,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-08-22 23:02:13,466 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 28 states. [2020-08-22 23:02:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:14,216 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2020-08-22 23:02:14,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 23:02:14,217 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 117 [2020-08-22 23:02:14,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:14,218 INFO L225 Difference]: With dead ends: 157 [2020-08-22 23:02:14,219 INFO L226 Difference]: Without dead ends: 132 [2020-08-22 23:02:14,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 23:02:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-22 23:02:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2020-08-22 23:02:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-22 23:02:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2020-08-22 23:02:14,229 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 117 [2020-08-22 23:02:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:14,230 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2020-08-22 23:02:14,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 23:02:14,230 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2020-08-22 23:02:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 23:02:14,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:14,232 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 3, 2, 2, 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 23:02:14,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 23:02:14,232 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:14,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:14,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1333669077, now seen corresponding path program 12 times [2020-08-22 23:02:14,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:14,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600269840] [2020-08-22 23:02:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:14,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:14,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600269840] [2020-08-22 23:02:14,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:14,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 23:02:14,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783279124] [2020-08-22 23:02:14,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 23:02:14,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:14,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 23:02:14,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-08-22 23:02:14,657 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 30 states. [2020-08-22 23:02:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:15,448 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2020-08-22 23:02:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 23:02:15,449 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 124 [2020-08-22 23:02:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:15,450 INFO L225 Difference]: With dead ends: 164 [2020-08-22 23:02:15,450 INFO L226 Difference]: Without dead ends: 139 [2020-08-22 23:02:15,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 23:02:15,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-22 23:02:15,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2020-08-22 23:02:15,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-22 23:02:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-08-22 23:02:15,461 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 124 [2020-08-22 23:02:15,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:15,461 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-08-22 23:02:15,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 23:02:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-08-22 23:02:15,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 23:02:15,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:15,464 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 3, 2, 2, 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 23:02:15,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 23:02:15,464 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:15,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:15,465 INFO L82 PathProgramCache]: Analyzing trace with hash 120152868, now seen corresponding path program 13 times [2020-08-22 23:02:15,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:15,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953449519] [2020-08-22 23:02:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:15,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:15,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953449519] [2020-08-22 23:02:15,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:15,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 23:02:15,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205133468] [2020-08-22 23:02:15,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 23:02:15,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:15,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 23:02:15,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-08-22 23:02:15,948 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 32 states. [2020-08-22 23:02:16,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:16,800 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2020-08-22 23:02:16,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-22 23:02:16,801 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 131 [2020-08-22 23:02:16,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:16,802 INFO L225 Difference]: With dead ends: 171 [2020-08-22 23:02:16,803 INFO L226 Difference]: Without dead ends: 146 [2020-08-22 23:02:16,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 23:02:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-22 23:02:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 141. [2020-08-22 23:02:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-08-22 23:02:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-08-22 23:02:16,817 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 131 [2020-08-22 23:02:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:16,817 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-08-22 23:02:16,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 23:02:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-08-22 23:02:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-08-22 23:02:16,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:16,819 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 3, 2, 2, 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 23:02:16,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 23:02:16,819 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:16,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:16,820 INFO L82 PathProgramCache]: Analyzing trace with hash -149797387, now seen corresponding path program 14 times [2020-08-22 23:02:16,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:16,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835989119] [2020-08-22 23:02:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:17,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:17,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835989119] [2020-08-22 23:02:17,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:17,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 23:02:17,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969494693] [2020-08-22 23:02:17,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 23:02:17,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:17,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 23:02:17,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 23:02:17,335 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 34 states. [2020-08-22 23:02:18,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:18,335 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2020-08-22 23:02:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 23:02:18,336 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 138 [2020-08-22 23:02:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:18,337 INFO L225 Difference]: With dead ends: 178 [2020-08-22 23:02:18,337 INFO L226 Difference]: Without dead ends: 153 [2020-08-22 23:02:18,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 23:02:18,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-08-22 23:02:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2020-08-22 23:02:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-22 23:02:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2020-08-22 23:02:18,348 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 138 [2020-08-22 23:02:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:18,348 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2020-08-22 23:02:18,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 23:02:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2020-08-22 23:02:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-22 23:02:18,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:18,351 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 3, 2, 2, 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 23:02:18,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 23:02:18,351 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:18,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1788659204, now seen corresponding path program 15 times [2020-08-22 23:02:18,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:18,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133297335] [2020-08-22 23:02:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:18,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:18,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133297335] [2020-08-22 23:02:18,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:18,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 23:02:18,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078819215] [2020-08-22 23:02:18,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 23:02:18,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:18,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 23:02:18,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 23:02:18,937 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 36 states. [2020-08-22 23:02:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:20,003 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2020-08-22 23:02:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-08-22 23:02:20,004 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 145 [2020-08-22 23:02:20,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:20,006 INFO L225 Difference]: With dead ends: 185 [2020-08-22 23:02:20,006 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 23:02:20,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 23:02:20,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 23:02:20,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2020-08-22 23:02:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-22 23:02:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2020-08-22 23:02:20,014 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 145 [2020-08-22 23:02:20,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:20,015 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2020-08-22 23:02:20,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 23:02:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2020-08-22 23:02:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-22 23:02:20,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:20,017 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 3, 2, 2, 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 23:02:20,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 23:02:20,017 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:20,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1953752853, now seen corresponding path program 16 times [2020-08-22 23:02:20,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:20,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186150020] [2020-08-22 23:02:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:20,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:20,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186150020] [2020-08-22 23:02:20,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:20,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 23:02:20,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158589575] [2020-08-22 23:02:20,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 23:02:20,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 23:02:20,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 23:02:20,655 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 38 states. [2020-08-22 23:02:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:21,812 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2020-08-22 23:02:21,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 23:02:21,813 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 152 [2020-08-22 23:02:21,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:21,815 INFO L225 Difference]: With dead ends: 192 [2020-08-22 23:02:21,815 INFO L226 Difference]: Without dead ends: 167 [2020-08-22 23:02:21,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 23:02:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-08-22 23:02:21,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 162. [2020-08-22 23:02:21,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 23:02:21,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2020-08-22 23:02:21,825 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 152 [2020-08-22 23:02:21,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:21,826 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2020-08-22 23:02:21,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 23:02:21,826 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2020-08-22 23:02:21,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-22 23:02:21,827 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:21,828 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 3, 2, 2, 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 23:02:21,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 23:02:21,828 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:21,828 INFO L82 PathProgramCache]: Analyzing trace with hash -411459356, now seen corresponding path program 17 times [2020-08-22 23:02:21,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:21,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059617805] [2020-08-22 23:02:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:22,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:22,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059617805] [2020-08-22 23:02:22,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:22,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 23:02:22,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244988873] [2020-08-22 23:02:22,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 23:02:22,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:22,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 23:02:22,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 23:02:22,515 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand 40 states. [2020-08-22 23:02:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:23,782 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2020-08-22 23:02:23,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-08-22 23:02:23,784 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 159 [2020-08-22 23:02:23,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:23,785 INFO L225 Difference]: With dead ends: 199 [2020-08-22 23:02:23,785 INFO L226 Difference]: Without dead ends: 174 [2020-08-22 23:02:23,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 23:02:23,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-22 23:02:23,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2020-08-22 23:02:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-08-22 23:02:23,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2020-08-22 23:02:23,794 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 159 [2020-08-22 23:02:23,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:23,795 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2020-08-22 23:02:23,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 23:02:23,795 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2020-08-22 23:02:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-22 23:02:23,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:23,797 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 3, 2, 2, 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 23:02:23,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 23:02:23,797 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:23,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1386934219, now seen corresponding path program 18 times [2020-08-22 23:02:23,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:23,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76284243] [2020-08-22 23:02:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:24,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:24,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76284243] [2020-08-22 23:02:24,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:24,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 23:02:24,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121723723] [2020-08-22 23:02:24,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 23:02:24,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:24,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 23:02:24,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 23:02:24,575 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 42 states. [2020-08-22 23:02:25,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:25,990 INFO L93 Difference]: Finished difference Result 206 states and 210 transitions. [2020-08-22 23:02:25,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-08-22 23:02:25,991 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 166 [2020-08-22 23:02:25,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:25,993 INFO L225 Difference]: With dead ends: 206 [2020-08-22 23:02:25,993 INFO L226 Difference]: Without dead ends: 181 [2020-08-22 23:02:25,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-08-22 23:02:25,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-08-22 23:02:26,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 176. [2020-08-22 23:02:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-22 23:02:26,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2020-08-22 23:02:26,002 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 166 [2020-08-22 23:02:26,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:26,003 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2020-08-22 23:02:26,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 23:02:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2020-08-22 23:02:26,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-08-22 23:02:26,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:26,005 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 3, 2, 2, 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 23:02:26,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 23:02:26,006 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:26,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:26,006 INFO L82 PathProgramCache]: Analyzing trace with hash 734917572, now seen corresponding path program 19 times [2020-08-22 23:02:26,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:26,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971638666] [2020-08-22 23:02:26,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:26,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 1350 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:26,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971638666] [2020-08-22 23:02:26,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:26,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 23:02:26,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639812746] [2020-08-22 23:02:26,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 23:02:26,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:26,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 23:02:26,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 23:02:26,850 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 44 states. [2020-08-22 23:02:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:28,342 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2020-08-22 23:02:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-08-22 23:02:28,343 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 173 [2020-08-22 23:02:28,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:28,344 INFO L225 Difference]: With dead ends: 213 [2020-08-22 23:02:28,344 INFO L226 Difference]: Without dead ends: 188 [2020-08-22 23:02:28,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-08-22 23:02:28,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-22 23:02:28,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 183. [2020-08-22 23:02:28,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-08-22 23:02:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2020-08-22 23:02:28,359 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 173 [2020-08-22 23:02:28,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:28,360 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2020-08-22 23:02:28,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 23:02:28,360 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2020-08-22 23:02:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-08-22 23:02:28,362 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:28,363 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 3, 2, 2, 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 23:02:28,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 23:02:28,363 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:28,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:28,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1477983915, now seen corresponding path program 20 times [2020-08-22 23:02:28,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:28,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444511858] [2020-08-22 23:02:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:29,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1491 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:29,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444511858] [2020-08-22 23:02:29,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:29,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-22 23:02:29,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164537778] [2020-08-22 23:02:29,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 23:02:29,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:29,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 23:02:29,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 23:02:29,528 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 46 states. [2020-08-22 23:02:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:30,995 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2020-08-22 23:02:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-08-22 23:02:30,996 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 180 [2020-08-22 23:02:30,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:31,000 INFO L225 Difference]: With dead ends: 220 [2020-08-22 23:02:31,000 INFO L226 Difference]: Without dead ends: 195 [2020-08-22 23:02:31,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-08-22 23:02:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-08-22 23:02:31,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 190. [2020-08-22 23:02:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-08-22 23:02:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2020-08-22 23:02:31,014 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 180 [2020-08-22 23:02:31,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:31,014 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2020-08-22 23:02:31,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 23:02:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2020-08-22 23:02:31,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-08-22 23:02:31,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:31,017 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 3, 2, 2, 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 23:02:31,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 23:02:31,017 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:31,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:31,018 INFO L82 PathProgramCache]: Analyzing trace with hash 891797156, now seen corresponding path program 21 times [2020-08-22 23:02:31,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:31,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130829433] [2020-08-22 23:02:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:31,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1639 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:32,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130829433] [2020-08-22 23:02:32,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:32,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-22 23:02:32,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099087408] [2020-08-22 23:02:32,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 23:02:32,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:32,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 23:02:32,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 23:02:32,005 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 48 states. [2020-08-22 23:02:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:33,649 INFO L93 Difference]: Finished difference Result 227 states and 231 transitions. [2020-08-22 23:02:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-08-22 23:02:33,650 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 187 [2020-08-22 23:02:33,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:33,652 INFO L225 Difference]: With dead ends: 227 [2020-08-22 23:02:33,652 INFO L226 Difference]: Without dead ends: 202 [2020-08-22 23:02:33,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-08-22 23:02:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-22 23:02:33,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2020-08-22 23:02:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-22 23:02:33,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2020-08-22 23:02:33,662 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 187 [2020-08-22 23:02:33,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:33,663 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2020-08-22 23:02:33,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 23:02:33,663 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2020-08-22 23:02:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-08-22 23:02:33,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:33,665 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 3, 2, 2, 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 23:02:33,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 23:02:33,665 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:33,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:33,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1428293003, now seen corresponding path program 22 times [2020-08-22 23:02:33,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:33,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134830411] [2020-08-22 23:02:33,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:34,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 1794 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:34,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134830411] [2020-08-22 23:02:34,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:34,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-22 23:02:34,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373439782] [2020-08-22 23:02:34,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-22 23:02:34,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:34,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-22 23:02:34,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 23:02:34,782 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand 50 states. [2020-08-22 23:02:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:36,683 INFO L93 Difference]: Finished difference Result 234 states and 238 transitions. [2020-08-22 23:02:36,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-08-22 23:02:36,684 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2020-08-22 23:02:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:36,686 INFO L225 Difference]: With dead ends: 234 [2020-08-22 23:02:36,686 INFO L226 Difference]: Without dead ends: 209 [2020-08-22 23:02:36,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-08-22 23:02:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-08-22 23:02:36,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 204. [2020-08-22 23:02:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 23:02:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2020-08-22 23:02:36,695 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 194 [2020-08-22 23:02:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:36,696 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2020-08-22 23:02:36,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-22 23:02:36,696 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2020-08-22 23:02:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-08-22 23:02:36,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:36,697 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 3, 2, 2, 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 23:02:36,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 23:02:36,698 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:36,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:36,698 INFO L82 PathProgramCache]: Analyzing trace with hash 815071620, now seen corresponding path program 23 times [2020-08-22 23:02:36,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:36,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002921777] [2020-08-22 23:02:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:37,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1967 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:37,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002921777] [2020-08-22 23:02:37,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:37,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-08-22 23:02:37,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015372188] [2020-08-22 23:02:37,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 23:02:37,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:37,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 23:02:37,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 23:02:37,884 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand 52 states. [2020-08-22 23:02:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:39,978 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2020-08-22 23:02:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-08-22 23:02:39,978 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 201 [2020-08-22 23:02:39,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:39,980 INFO L225 Difference]: With dead ends: 241 [2020-08-22 23:02:39,980 INFO L226 Difference]: Without dead ends: 216 [2020-08-22 23:02:39,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-08-22 23:02:39,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-22 23:02:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 211. [2020-08-22 23:02:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-22 23:02:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2020-08-22 23:02:39,990 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 201 [2020-08-22 23:02:39,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:39,991 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2020-08-22 23:02:39,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 23:02:39,991 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2020-08-22 23:02:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-08-22 23:02:39,992 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:39,993 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 3, 2, 2, 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 23:02:39,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 23:02:39,993 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:39,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:39,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1567210389, now seen corresponding path program 24 times [2020-08-22 23:02:39,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:39,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648549943] [2020-08-22 23:02:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:41,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 0 proven. 2125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:41,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648549943] [2020-08-22 23:02:41,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:41,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-08-22 23:02:41,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395145163] [2020-08-22 23:02:41,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-22 23:02:41,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:41,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-22 23:02:41,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 23:02:41,248 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 54 states. [2020-08-22 23:02:43,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:43,274 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2020-08-22 23:02:43,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-08-22 23:02:43,275 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 208 [2020-08-22 23:02:43,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:43,277 INFO L225 Difference]: With dead ends: 248 [2020-08-22 23:02:43,277 INFO L226 Difference]: Without dead ends: 223 [2020-08-22 23:02:43,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-08-22 23:02:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-22 23:02:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 218. [2020-08-22 23:02:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-08-22 23:02:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 220 transitions. [2020-08-22 23:02:43,286 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 220 transitions. Word has length 208 [2020-08-22 23:02:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:43,287 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 220 transitions. [2020-08-22 23:02:43,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-22 23:02:43,287 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 220 transitions. [2020-08-22 23:02:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-08-22 23:02:43,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:43,289 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 3, 2, 2, 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 23:02:43,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 23:02:43,289 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:43,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:43,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1520680036, now seen corresponding path program 25 times [2020-08-22 23:02:43,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:43,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404791148] [2020-08-22 23:02:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:44,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:44,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404791148] [2020-08-22 23:02:44,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:44,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-08-22 23:02:44,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367405958] [2020-08-22 23:02:44,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-08-22 23:02:44,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:44,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-08-22 23:02:44,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 23:02:44,658 INFO L87 Difference]: Start difference. First operand 218 states and 220 transitions. Second operand 56 states. [2020-08-22 23:02:47,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:47,066 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2020-08-22 23:02:47,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-08-22 23:02:47,066 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 215 [2020-08-22 23:02:47,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:47,069 INFO L225 Difference]: With dead ends: 255 [2020-08-22 23:02:47,069 INFO L226 Difference]: Without dead ends: 230 [2020-08-22 23:02:47,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-08-22 23:02:47,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-08-22 23:02:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 225. [2020-08-22 23:02:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-08-22 23:02:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2020-08-22 23:02:47,080 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 215 [2020-08-22 23:02:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:47,080 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2020-08-22 23:02:47,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-08-22 23:02:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2020-08-22 23:02:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-08-22 23:02:47,082 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:47,082 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 3, 2, 2, 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 23:02:47,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 23:02:47,083 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash -415431499, now seen corresponding path program 26 times [2020-08-22 23:02:47,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:47,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823961726] [2020-08-22 23:02:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:48,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2495 backedges. 0 proven. 2484 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:48,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823961726] [2020-08-22 23:02:48,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:48,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-08-22 23:02:48,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036585120] [2020-08-22 23:02:48,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-08-22 23:02:48,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:48,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-08-22 23:02:48,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 23:02:48,595 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 58 states. [2020-08-22 23:02:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:51,183 INFO L93 Difference]: Finished difference Result 262 states and 266 transitions. [2020-08-22 23:02:51,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-08-22 23:02:51,188 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 222 [2020-08-22 23:02:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:51,190 INFO L225 Difference]: With dead ends: 262 [2020-08-22 23:02:51,190 INFO L226 Difference]: Without dead ends: 237 [2020-08-22 23:02:51,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-08-22 23:02:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-08-22 23:02:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 232. [2020-08-22 23:02:51,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-22 23:02:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2020-08-22 23:02:51,199 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 222 [2020-08-22 23:02:51,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:51,199 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2020-08-22 23:02:51,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-08-22 23:02:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2020-08-22 23:02:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-08-22 23:02:51,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:51,201 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 3, 2, 2, 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 23:02:51,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 23:02:51,201 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:51,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:51,202 INFO L82 PathProgramCache]: Analyzing trace with hash -547229884, now seen corresponding path program 27 times [2020-08-22 23:02:51,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:51,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537533812] [2020-08-22 23:02:51,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:52,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2685 backedges. 0 proven. 2674 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:52,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537533812] [2020-08-22 23:02:52,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:52,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-08-22 23:02:52,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713328660] [2020-08-22 23:02:52,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-08-22 23:02:52,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:52,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-08-22 23:02:52,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 23:02:52,824 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand 60 states. [2020-08-22 23:02:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:55,606 INFO L93 Difference]: Finished difference Result 269 states and 273 transitions. [2020-08-22 23:02:55,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-08-22 23:02:55,606 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 229 [2020-08-22 23:02:55,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:55,609 INFO L225 Difference]: With dead ends: 269 [2020-08-22 23:02:55,609 INFO L226 Difference]: Without dead ends: 244 [2020-08-22 23:02:55,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-08-22 23:02:55,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-08-22 23:02:55,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 239. [2020-08-22 23:02:55,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-08-22 23:02:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2020-08-22 23:02:55,619 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 229 [2020-08-22 23:02:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:55,620 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2020-08-22 23:02:55,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-08-22 23:02:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2020-08-22 23:02:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-08-22 23:02:55,621 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:55,622 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 3, 2, 2, 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 23:02:55,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 23:02:55,623 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:55,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:55,623 INFO L82 PathProgramCache]: Analyzing trace with hash 277468629, now seen corresponding path program 28 times [2020-08-22 23:02:55,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:55,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329173805] [2020-08-22 23:02:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:57,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2871 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:02:57,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329173805] [2020-08-22 23:02:57,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:57,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-08-22 23:02:57,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269789916] [2020-08-22 23:02:57,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-08-22 23:02:57,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:57,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-08-22 23:02:57,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-08-22 23:02:57,345 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand 62 states. [2020-08-22 23:03:00,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:00,315 INFO L93 Difference]: Finished difference Result 276 states and 280 transitions. [2020-08-22 23:03:00,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-08-22 23:03:00,316 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 236 [2020-08-22 23:03:00,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:00,319 INFO L225 Difference]: With dead ends: 276 [2020-08-22 23:03:00,319 INFO L226 Difference]: Without dead ends: 251 [2020-08-22 23:03:00,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-08-22 23:03:00,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-08-22 23:03:00,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 246. [2020-08-22 23:03:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-08-22 23:03:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 248 transitions. [2020-08-22 23:03:00,330 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 248 transitions. Word has length 236 [2020-08-22 23:03:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:00,331 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 248 transitions. [2020-08-22 23:03:00,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-08-22 23:03:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 248 transitions. [2020-08-22 23:03:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-08-22 23:03:00,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:00,333 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 3, 2, 2, 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 23:03:00,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 23:03:00,333 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:00,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:00,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1168270812, now seen corresponding path program 29 times [2020-08-22 23:03:00,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:00,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816134409] [2020-08-22 23:03:00,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:02,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3086 backedges. 0 proven. 3075 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:03:02,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816134409] [2020-08-22 23:03:02,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:02,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-08-22 23:03:02,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421048139] [2020-08-22 23:03:02,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-08-22 23:03:02,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:02,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-08-22 23:03:02,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 23:03:02,157 INFO L87 Difference]: Start difference. First operand 246 states and 248 transitions. Second operand 64 states. [2020-08-22 23:03:05,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:05,370 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2020-08-22 23:03:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-08-22 23:03:05,371 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 243 [2020-08-22 23:03:05,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:05,373 INFO L225 Difference]: With dead ends: 283 [2020-08-22 23:03:05,373 INFO L226 Difference]: Without dead ends: 258 [2020-08-22 23:03:05,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-08-22 23:03:05,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-22 23:03:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 253. [2020-08-22 23:03:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-22 23:03:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2020-08-22 23:03:05,382 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 243 [2020-08-22 23:03:05,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:05,383 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2020-08-22 23:03:05,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-08-22 23:03:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2020-08-22 23:03:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-08-22 23:03:05,385 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:05,385 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 3, 2, 2, 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 23:03:05,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 23:03:05,385 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:05,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:05,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1644310261, now seen corresponding path program 30 times [2020-08-22 23:03:05,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:05,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966207771] [2020-08-22 23:03:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:07,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3297 backedges. 0 proven. 3286 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:03:07,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966207771] [2020-08-22 23:03:07,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:07,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-08-22 23:03:07,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696428669] [2020-08-22 23:03:07,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-08-22 23:03:07,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:07,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-08-22 23:03:07,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-08-22 23:03:07,374 INFO L87 Difference]: Start difference. First operand 253 states and 255 transitions. Second operand 66 states. [2020-08-22 23:03:10,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:10,656 INFO L93 Difference]: Finished difference Result 290 states and 294 transitions. [2020-08-22 23:03:10,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-08-22 23:03:10,657 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 250 [2020-08-22 23:03:10,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:10,659 INFO L225 Difference]: With dead ends: 290 [2020-08-22 23:03:10,659 INFO L226 Difference]: Without dead ends: 265 [2020-08-22 23:03:10,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-08-22 23:03:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-22 23:03:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 260. [2020-08-22 23:03:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-22 23:03:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 262 transitions. [2020-08-22 23:03:10,669 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 262 transitions. Word has length 250 [2020-08-22 23:03:10,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:10,669 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 262 transitions. [2020-08-22 23:03:10,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-08-22 23:03:10,669 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 262 transitions. [2020-08-22 23:03:10,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-08-22 23:03:10,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:10,671 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 3, 2, 2, 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 23:03:10,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 23:03:10,671 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:10,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1767588604, now seen corresponding path program 31 times [2020-08-22 23:03:10,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:10,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399993724] [2020-08-22 23:03:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:12,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 0 proven. 3504 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:03:12,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399993724] [2020-08-22 23:03:12,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:12,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-08-22 23:03:12,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868398276] [2020-08-22 23:03:12,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-08-22 23:03:12,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-08-22 23:03:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 23:03:12,858 INFO L87 Difference]: Start difference. First operand 260 states and 262 transitions. Second operand 68 states. [2020-08-22 23:03:16,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:16,500 INFO L93 Difference]: Finished difference Result 297 states and 301 transitions. [2020-08-22 23:03:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-08-22 23:03:16,501 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 257 [2020-08-22 23:03:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:16,503 INFO L225 Difference]: With dead ends: 297 [2020-08-22 23:03:16,503 INFO L226 Difference]: Without dead ends: 272 [2020-08-22 23:03:16,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-08-22 23:03:16,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-08-22 23:03:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 267. [2020-08-22 23:03:16,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-08-22 23:03:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2020-08-22 23:03:16,513 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 257 [2020-08-22 23:03:16,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:16,513 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2020-08-22 23:03:16,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-08-22 23:03:16,514 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2020-08-22 23:03:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-08-22 23:03:16,515 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:16,515 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 3, 2, 2, 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 23:03:16,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 23:03:16,516 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:16,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:16,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1155010581, now seen corresponding path program 32 times [2020-08-22 23:03:16,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:16,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600733258] [2020-08-22 23:03:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:18,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3740 backedges. 0 proven. 3729 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:03:18,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600733258] [2020-08-22 23:03:18,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:18,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-08-22 23:03:18,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897305193] [2020-08-22 23:03:18,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-08-22 23:03:18,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:18,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-08-22 23:03:18,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-08-22 23:03:18,796 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand 70 states. [2020-08-22 23:03:22,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:22,805 INFO L93 Difference]: Finished difference Result 304 states and 308 transitions. [2020-08-22 23:03:22,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-08-22 23:03:22,806 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 264 [2020-08-22 23:03:22,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:22,808 INFO L225 Difference]: With dead ends: 304 [2020-08-22 23:03:22,809 INFO L226 Difference]: Without dead ends: 279 [2020-08-22 23:03:22,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-08-22 23:03:22,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-08-22 23:03:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 274. [2020-08-22 23:03:22,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-08-22 23:03:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 276 transitions. [2020-08-22 23:03:22,819 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 276 transitions. Word has length 264 [2020-08-22 23:03:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:22,820 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 276 transitions. [2020-08-22 23:03:22,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-08-22 23:03:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 276 transitions. [2020-08-22 23:03:22,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-08-22 23:03:22,822 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:22,822 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 3, 2, 2, 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 23:03:22,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 23:03:22,822 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:22,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:22,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1362798620, now seen corresponding path program 33 times [2020-08-22 23:03:22,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:22,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100989926] [2020-08-22 23:03:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:25,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 0 proven. 3961 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:03:25,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100989926] [2020-08-22 23:03:25,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:25,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-08-22 23:03:25,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018775832] [2020-08-22 23:03:25,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-08-22 23:03:25,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:25,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-08-22 23:03:25,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 23:03:25,304 INFO L87 Difference]: Start difference. First operand 274 states and 276 transitions. Second operand 72 states. [2020-08-22 23:03:29,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:29,604 INFO L93 Difference]: Finished difference Result 311 states and 315 transitions. [2020-08-22 23:03:29,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-08-22 23:03:29,604 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 271 [2020-08-22 23:03:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:29,607 INFO L225 Difference]: With dead ends: 311 [2020-08-22 23:03:29,607 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 23:03:29,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-08-22 23:03:29,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 23:03:29,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 281. [2020-08-22 23:03:29,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-08-22 23:03:29,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 283 transitions. [2020-08-22 23:03:29,618 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 283 transitions. Word has length 271 [2020-08-22 23:03:29,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:29,618 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 283 transitions. [2020-08-22 23:03:29,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-08-22 23:03:29,619 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 283 transitions. [2020-08-22 23:03:29,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-08-22 23:03:29,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:29,621 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 3, 2, 2, 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 23:03:29,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 23:03:29,621 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:29,621 INFO L82 PathProgramCache]: Analyzing trace with hash 582842677, now seen corresponding path program 34 times [2020-08-22 23:03:29,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:29,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111472231] [2020-08-22 23:03:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:32,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4211 backedges. 0 proven. 4200 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:03:32,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111472231] [2020-08-22 23:03:32,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:32,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-08-22 23:03:32,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754236033] [2020-08-22 23:03:32,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-08-22 23:03:32,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:32,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-08-22 23:03:32,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-08-22 23:03:32,287 INFO L87 Difference]: Start difference. First operand 281 states and 283 transitions. Second operand 74 states. [2020-08-22 23:03:36,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:36,722 INFO L93 Difference]: Finished difference Result 318 states and 322 transitions. [2020-08-22 23:03:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-08-22 23:03:36,723 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 278 [2020-08-22 23:03:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:36,725 INFO L225 Difference]: With dead ends: 318 [2020-08-22 23:03:36,725 INFO L226 Difference]: Without dead ends: 293 [2020-08-22 23:03:36,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-08-22 23:03:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-08-22 23:03:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 288. [2020-08-22 23:03:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-08-22 23:03:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 290 transitions. [2020-08-22 23:03:36,736 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 290 transitions. Word has length 278 [2020-08-22 23:03:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:36,736 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 290 transitions. [2020-08-22 23:03:36,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-08-22 23:03:36,736 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 290 transitions. [2020-08-22 23:03:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-08-22 23:03:36,738 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:36,738 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 3, 2, 2, 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 23:03:36,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 23:03:36,739 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:36,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1395823932, now seen corresponding path program 35 times [2020-08-22 23:03:36,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:36,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120614907] [2020-08-22 23:03:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:39,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4457 backedges. 0 proven. 4446 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:03:39,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120614907] [2020-08-22 23:03:39,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:39,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-08-22 23:03:39,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255886669] [2020-08-22 23:03:39,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-08-22 23:03:39,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:39,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-08-22 23:03:39,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 23:03:39,584 INFO L87 Difference]: Start difference. First operand 288 states and 290 transitions. Second operand 76 states. [2020-08-22 23:03:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:44,604 INFO L93 Difference]: Finished difference Result 325 states and 329 transitions. [2020-08-22 23:03:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-08-22 23:03:44,605 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 285 [2020-08-22 23:03:44,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:44,607 INFO L225 Difference]: With dead ends: 325 [2020-08-22 23:03:44,607 INFO L226 Difference]: Without dead ends: 300 [2020-08-22 23:03:44,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-08-22 23:03:44,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-08-22 23:03:44,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 295. [2020-08-22 23:03:44,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-08-22 23:03:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 297 transitions. [2020-08-22 23:03:44,617 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 297 transitions. Word has length 285 [2020-08-22 23:03:44,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:44,617 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 297 transitions. [2020-08-22 23:03:44,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-08-22 23:03:44,618 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 297 transitions. [2020-08-22 23:03:44,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-08-22 23:03:44,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:44,620 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 3, 2, 2, 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 23:03:44,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 23:03:44,620 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:44,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:44,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2048628139, now seen corresponding path program 36 times [2020-08-22 23:03:44,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:44,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966373220] [2020-08-22 23:03:44,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:47,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4699 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:03:47,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966373220] [2020-08-22 23:03:47,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:47,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-08-22 23:03:47,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728862368] [2020-08-22 23:03:47,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-08-22 23:03:47,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:47,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-08-22 23:03:47,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-08-22 23:03:47,772 INFO L87 Difference]: Start difference. First operand 295 states and 297 transitions. Second operand 78 states. [2020-08-22 23:03:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:52,717 INFO L93 Difference]: Finished difference Result 332 states and 336 transitions. [2020-08-22 23:03:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-08-22 23:03:52,718 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 292 [2020-08-22 23:03:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:52,721 INFO L225 Difference]: With dead ends: 332 [2020-08-22 23:03:52,723 INFO L226 Difference]: Without dead ends: 307 [2020-08-22 23:03:52,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-08-22 23:03:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-08-22 23:03:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 302. [2020-08-22 23:03:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-08-22 23:03:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 304 transitions. [2020-08-22 23:03:52,733 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 304 transitions. Word has length 292 [2020-08-22 23:03:52,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:52,734 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 304 transitions. [2020-08-22 23:03:52,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-08-22 23:03:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 304 transitions. [2020-08-22 23:03:52,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-08-22 23:03:52,736 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:52,736 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 3, 2, 2, 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 23:03:52,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 23:03:52,736 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:52,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:52,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1974798940, now seen corresponding path program 37 times [2020-08-22 23:03:52,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:52,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098832295] [2020-08-22 23:03:52,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:56,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4959 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:03:56,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098832295] [2020-08-22 23:03:56,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:56,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-08-22 23:03:56,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163862110] [2020-08-22 23:03:56,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-08-22 23:03:56,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:56,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-08-22 23:03:56,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-08-22 23:03:56,124 INFO L87 Difference]: Start difference. First operand 302 states and 304 transitions. Second operand 80 states. [2020-08-22 23:04:01,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:01,782 INFO L93 Difference]: Finished difference Result 339 states and 343 transitions. [2020-08-22 23:04:01,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-08-22 23:04:01,783 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 299 [2020-08-22 23:04:01,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:01,786 INFO L225 Difference]: With dead ends: 339 [2020-08-22 23:04:01,786 INFO L226 Difference]: Without dead ends: 314 [2020-08-22 23:04:01,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-08-22 23:04:01,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-08-22 23:04:01,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 309. [2020-08-22 23:04:01,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-08-22 23:04:01,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 311 transitions. [2020-08-22 23:04:01,796 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 311 transitions. Word has length 299 [2020-08-22 23:04:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:01,797 INFO L479 AbstractCegarLoop]: Abstraction has 309 states and 311 transitions. [2020-08-22 23:04:01,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-08-22 23:04:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 311 transitions. [2020-08-22 23:04:01,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-08-22 23:04:01,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:01,799 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 3, 2, 2, 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 23:04:01,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 23:04:01,800 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:01,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:01,800 INFO L82 PathProgramCache]: Analyzing trace with hash 956228469, now seen corresponding path program 38 times [2020-08-22 23:04:01,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:01,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506614096] [2020-08-22 23:04:01,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:05,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5237 backedges. 0 proven. 5226 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:04:05,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506614096] [2020-08-22 23:04:05,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:05,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-08-22 23:04:05,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810480185] [2020-08-22 23:04:05,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-08-22 23:04:05,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:05,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-08-22 23:04:05,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-08-22 23:04:05,605 INFO L87 Difference]: Start difference. First operand 309 states and 311 transitions. Second operand 82 states. [2020-08-22 23:04:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:11,917 INFO L93 Difference]: Finished difference Result 346 states and 350 transitions. [2020-08-22 23:04:11,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-08-22 23:04:11,918 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 306 [2020-08-22 23:04:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:11,921 INFO L225 Difference]: With dead ends: 346 [2020-08-22 23:04:11,921 INFO L226 Difference]: Without dead ends: 321 [2020-08-22 23:04:11,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-08-22 23:04:11,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-08-22 23:04:11,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 316. [2020-08-22 23:04:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-08-22 23:04:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 318 transitions. [2020-08-22 23:04:11,930 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 318 transitions. Word has length 306 [2020-08-22 23:04:11,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:11,931 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 318 transitions. [2020-08-22 23:04:11,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-08-22 23:04:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 318 transitions. [2020-08-22 23:04:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-08-22 23:04:11,933 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:11,933 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 3, 2, 2, 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 23:04:11,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 23:04:11,934 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:11,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:11,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1884027012, now seen corresponding path program 39 times [2020-08-22 23:04:11,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:11,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736258696] [2020-08-22 23:04:11,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:16,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5511 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:04:16,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736258696] [2020-08-22 23:04:16,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:16,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-08-22 23:04:16,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818270250] [2020-08-22 23:04:16,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-08-22 23:04:16,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:16,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-08-22 23:04:16,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-08-22 23:04:16,138 INFO L87 Difference]: Start difference. First operand 316 states and 318 transitions. Second operand 84 states. [2020-08-22 23:04:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:22,323 INFO L93 Difference]: Finished difference Result 353 states and 357 transitions. [2020-08-22 23:04:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-08-22 23:04:22,325 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 313 [2020-08-22 23:04:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:22,327 INFO L225 Difference]: With dead ends: 353 [2020-08-22 23:04:22,327 INFO L226 Difference]: Without dead ends: 328 [2020-08-22 23:04:22,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-08-22 23:04:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-08-22 23:04:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 323. [2020-08-22 23:04:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-22 23:04:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 325 transitions. [2020-08-22 23:04:22,337 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 325 transitions. Word has length 313 [2020-08-22 23:04:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:22,338 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 325 transitions. [2020-08-22 23:04:22,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-08-22 23:04:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 325 transitions. [2020-08-22 23:04:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-08-22 23:04:22,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:22,341 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 3, 2, 2, 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 23:04:22,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 23:04:22,341 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:22,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:22,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1732174997, now seen corresponding path program 40 times [2020-08-22 23:04:22,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:22,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884069842] [2020-08-22 23:04:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:26,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5792 backedges. 0 proven. 5781 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:04:26,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884069842] [2020-08-22 23:04:26,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:26,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-08-22 23:04:26,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816836408] [2020-08-22 23:04:26,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-08-22 23:04:26,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:26,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-08-22 23:04:26,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-08-22 23:04:26,704 INFO L87 Difference]: Start difference. First operand 323 states and 325 transitions. Second operand 86 states. [2020-08-22 23:04:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:34,255 INFO L93 Difference]: Finished difference Result 360 states and 364 transitions. [2020-08-22 23:04:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-08-22 23:04:34,256 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 320 [2020-08-22 23:04:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:34,259 INFO L225 Difference]: With dead ends: 360 [2020-08-22 23:04:34,259 INFO L226 Difference]: Without dead ends: 335 [2020-08-22 23:04:34,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-08-22 23:04:34,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-08-22 23:04:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 330. [2020-08-22 23:04:34,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-08-22 23:04:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 332 transitions. [2020-08-22 23:04:34,269 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 332 transitions. Word has length 320 [2020-08-22 23:04:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:34,269 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 332 transitions. [2020-08-22 23:04:34,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-08-22 23:04:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 332 transitions. [2020-08-22 23:04:34,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-22 23:04:34,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:34,272 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 3, 2, 2, 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 23:04:34,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 23:04:34,272 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:34,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1755417756, now seen corresponding path program 41 times [2020-08-22 23:04:34,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:34,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169787301] [2020-08-22 23:04:34,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6080 backedges. 0 proven. 6069 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:04:39,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169787301] [2020-08-22 23:04:39,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:39,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-08-22 23:04:39,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936457979] [2020-08-22 23:04:39,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-08-22 23:04:39,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:39,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-08-22 23:04:39,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-08-22 23:04:39,292 INFO L87 Difference]: Start difference. First operand 330 states and 332 transitions. Second operand 88 states. [2020-08-22 23:04:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:46,980 INFO L93 Difference]: Finished difference Result 367 states and 371 transitions. [2020-08-22 23:04:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-08-22 23:04:46,982 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 327 [2020-08-22 23:04:46,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:46,984 INFO L225 Difference]: With dead ends: 367 [2020-08-22 23:04:46,984 INFO L226 Difference]: Without dead ends: 342 [2020-08-22 23:04:46,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-08-22 23:04:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-08-22 23:04:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 337. [2020-08-22 23:04:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-08-22 23:04:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 339 transitions. [2020-08-22 23:04:46,994 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 339 transitions. Word has length 327 [2020-08-22 23:04:46,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:46,994 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 339 transitions. [2020-08-22 23:04:46,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-08-22 23:04:46,995 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 339 transitions. [2020-08-22 23:04:46,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-08-22 23:04:46,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:46,997 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 3, 2, 2, 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 23:04:46,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 23:04:46,998 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:46,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1135186507, now seen corresponding path program 42 times [2020-08-22 23:04:46,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:46,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912509155] [2020-08-22 23:04:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 0 proven. 6364 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:04:52,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912509155] [2020-08-22 23:04:52,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:52,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-08-22 23:04:52,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483426111] [2020-08-22 23:04:52,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-08-22 23:04:52,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:52,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-08-22 23:04:52,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-08-22 23:04:52,287 INFO L87 Difference]: Start difference. First operand 337 states and 339 transitions. Second operand 90 states. [2020-08-22 23:05:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:01,096 INFO L93 Difference]: Finished difference Result 374 states and 378 transitions. [2020-08-22 23:05:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-08-22 23:05:01,097 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 334 [2020-08-22 23:05:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:01,100 INFO L225 Difference]: With dead ends: 374 [2020-08-22 23:05:01,100 INFO L226 Difference]: Without dead ends: 349 [2020-08-22 23:05:01,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-08-22 23:05:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-22 23:05:01,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 344. [2020-08-22 23:05:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-22 23:05:01,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 346 transitions. [2020-08-22 23:05:01,109 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 346 transitions. Word has length 334 [2020-08-22 23:05:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:01,110 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 346 transitions. [2020-08-22 23:05:01,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-08-22 23:05:01,110 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 346 transitions. [2020-08-22 23:05:01,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-08-22 23:05:01,112 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:01,112 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 3, 2, 2, 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 23:05:01,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 23:05:01,113 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:01,113 INFO L82 PathProgramCache]: Analyzing trace with hash 663774788, now seen corresponding path program 43 times [2020-08-22 23:05:01,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:01,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269157356] [2020-08-22 23:05:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:07,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6677 backedges. 0 proven. 6666 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:05:07,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269157356] [2020-08-22 23:05:07,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:07,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-08-22 23:05:07,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157082263] [2020-08-22 23:05:07,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-08-22 23:05:07,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:07,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-08-22 23:05:07,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-08-22 23:05:07,454 INFO L87 Difference]: Start difference. First operand 344 states and 346 transitions. Second operand 92 states. [2020-08-22 23:05:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:17,261 INFO L93 Difference]: Finished difference Result 381 states and 385 transitions. [2020-08-22 23:05:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-08-22 23:05:17,266 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 341 [2020-08-22 23:05:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:17,268 INFO L225 Difference]: With dead ends: 381 [2020-08-22 23:05:17,268 INFO L226 Difference]: Without dead ends: 356 [2020-08-22 23:05:17,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-08-22 23:05:17,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-08-22 23:05:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 351. [2020-08-22 23:05:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-08-22 23:05:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 353 transitions. [2020-08-22 23:05:17,280 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 353 transitions. Word has length 341 [2020-08-22 23:05:17,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:17,280 INFO L479 AbstractCegarLoop]: Abstraction has 351 states and 353 transitions. [2020-08-22 23:05:17,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-08-22 23:05:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 353 transitions. [2020-08-22 23:05:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-08-22 23:05:17,283 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:17,283 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 3, 2, 2, 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 23:05:17,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 23:05:17,284 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:17,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2072543531, now seen corresponding path program 44 times [2020-08-22 23:05:17,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:17,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402411698] [2020-08-22 23:05:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:23,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6986 backedges. 0 proven. 6975 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:05:23,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402411698] [2020-08-22 23:05:23,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:23,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-08-22 23:05:23,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350088991] [2020-08-22 23:05:23,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-08-22 23:05:23,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:23,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-08-22 23:05:23,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-08-22 23:05:23,914 INFO L87 Difference]: Start difference. First operand 351 states and 353 transitions. Second operand 94 states. [2020-08-22 23:05:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:34,514 INFO L93 Difference]: Finished difference Result 388 states and 392 transitions. [2020-08-22 23:05:34,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-08-22 23:05:34,515 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 348 [2020-08-22 23:05:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:34,517 INFO L225 Difference]: With dead ends: 388 [2020-08-22 23:05:34,518 INFO L226 Difference]: Without dead ends: 363 [2020-08-22 23:05:34,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-08-22 23:05:34,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-08-22 23:05:34,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 358. [2020-08-22 23:05:34,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-08-22 23:05:34,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 360 transitions. [2020-08-22 23:05:34,528 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 360 transitions. Word has length 348 [2020-08-22 23:05:34,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:34,528 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 360 transitions. [2020-08-22 23:05:34,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-08-22 23:05:34,529 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 360 transitions. [2020-08-22 23:05:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-08-22 23:05:34,531 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:34,531 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 3, 2, 2, 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 23:05:34,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 23:05:34,532 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:34,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:34,532 INFO L82 PathProgramCache]: Analyzing trace with hash 409981220, now seen corresponding path program 45 times [2020-08-22 23:05:34,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:34,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551894191] [2020-08-22 23:05:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:41,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7302 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:05:41,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551894191] [2020-08-22 23:05:41,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:41,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-08-22 23:05:41,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660306955] [2020-08-22 23:05:41,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-08-22 23:05:41,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:41,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-08-22 23:05:41,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-08-22 23:05:41,974 INFO L87 Difference]: Start difference. First operand 358 states and 360 transitions. Second operand 96 states. [2020-08-22 23:05:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:53,325 INFO L93 Difference]: Finished difference Result 395 states and 399 transitions. [2020-08-22 23:05:53,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-08-22 23:05:53,328 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 355 [2020-08-22 23:05:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:53,330 INFO L225 Difference]: With dead ends: 395 [2020-08-22 23:05:53,330 INFO L226 Difference]: Without dead ends: 370 [2020-08-22 23:05:53,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-08-22 23:05:53,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-08-22 23:05:53,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 365. [2020-08-22 23:05:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-08-22 23:05:53,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 367 transitions. [2020-08-22 23:05:53,340 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 367 transitions. Word has length 355 [2020-08-22 23:05:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:53,340 INFO L479 AbstractCegarLoop]: Abstraction has 365 states and 367 transitions. [2020-08-22 23:05:53,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-08-22 23:05:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 367 transitions. [2020-08-22 23:05:53,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-08-22 23:05:53,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:53,343 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 3, 2, 2, 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 23:05:53,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 23:05:53,343 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:53,344 INFO L82 PathProgramCache]: Analyzing trace with hash -866904075, now seen corresponding path program 46 times [2020-08-22 23:05:53,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:53,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433109849] [2020-08-22 23:05:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:01,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7625 backedges. 0 proven. 7614 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:06:01,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433109849] [2020-08-22 23:06:01,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:01,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2020-08-22 23:06:01,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522699888] [2020-08-22 23:06:01,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-08-22 23:06:01,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:01,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-08-22 23:06:01,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-08-22 23:06:01,293 INFO L87 Difference]: Start difference. First operand 365 states and 367 transitions. Second operand 98 states. [2020-08-22 23:06:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:14,309 INFO L93 Difference]: Finished difference Result 402 states and 406 transitions. [2020-08-22 23:06:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-08-22 23:06:14,311 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 362 [2020-08-22 23:06:14,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:14,314 INFO L225 Difference]: With dead ends: 402 [2020-08-22 23:06:14,315 INFO L226 Difference]: Without dead ends: 377 [2020-08-22 23:06:14,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-08-22 23:06:14,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-08-22 23:06:14,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 372. [2020-08-22 23:06:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-08-22 23:06:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 374 transitions. [2020-08-22 23:06:14,325 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 374 transitions. Word has length 362 [2020-08-22 23:06:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:14,326 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 374 transitions. [2020-08-22 23:06:14,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-08-22 23:06:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 374 transitions. [2020-08-22 23:06:14,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-08-22 23:06:14,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:14,329 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 3, 2, 2, 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 23:06:14,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 23:06:14,329 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:14,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:14,330 INFO L82 PathProgramCache]: Analyzing trace with hash 285914116, now seen corresponding path program 47 times [2020-08-22 23:06:14,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:14,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288344023] [2020-08-22 23:06:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:23,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7955 backedges. 0 proven. 7944 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:06:23,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288344023] [2020-08-22 23:06:23,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:23,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-08-22 23:06:23,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431739245] [2020-08-22 23:06:23,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-08-22 23:06:23,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:23,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-08-22 23:06:23,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-08-22 23:06:23,631 INFO L87 Difference]: Start difference. First operand 372 states and 374 transitions. Second operand 100 states. [2020-08-22 23:06:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:38,231 INFO L93 Difference]: Finished difference Result 409 states and 413 transitions. [2020-08-22 23:06:38,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-08-22 23:06:38,233 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 369 [2020-08-22 23:06:38,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:38,236 INFO L225 Difference]: With dead ends: 409 [2020-08-22 23:06:38,236 INFO L226 Difference]: Without dead ends: 384 [2020-08-22 23:06:38,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-08-22 23:06:38,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-08-22 23:06:38,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 379. [2020-08-22 23:06:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-08-22 23:06:38,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 381 transitions. [2020-08-22 23:06:38,247 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 381 transitions. Word has length 369 [2020-08-22 23:06:38,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:38,247 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 381 transitions. [2020-08-22 23:06:38,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-08-22 23:06:38,247 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 381 transitions. [2020-08-22 23:06:38,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-08-22 23:06:38,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:38,250 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 3, 2, 2, 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 23:06:38,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 23:06:38,251 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:38,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2128725739, now seen corresponding path program 48 times [2020-08-22 23:06:38,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:38,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596881476] [2020-08-22 23:06:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:48,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8292 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:06:48,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596881476] [2020-08-22 23:06:48,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:48,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2020-08-22 23:06:48,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11617519] [2020-08-22 23:06:48,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-08-22 23:06:48,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:48,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-08-22 23:06:48,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-08-22 23:06:48,357 INFO L87 Difference]: Start difference. First operand 379 states and 381 transitions. Second operand 102 states. [2020-08-22 23:07:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:04,915 INFO L93 Difference]: Finished difference Result 416 states and 420 transitions. [2020-08-22 23:07:04,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-08-22 23:07:04,918 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 376 [2020-08-22 23:07:04,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:04,920 INFO L225 Difference]: With dead ends: 416 [2020-08-22 23:07:04,920 INFO L226 Difference]: Without dead ends: 391 [2020-08-22 23:07:04,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-08-22 23:07:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-08-22 23:07:04,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 386. [2020-08-22 23:07:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-08-22 23:07:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 388 transitions. [2020-08-22 23:07:04,929 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 388 transitions. Word has length 376 [2020-08-22 23:07:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:04,930 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 388 transitions. [2020-08-22 23:07:04,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-08-22 23:07:04,930 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 388 transitions. [2020-08-22 23:07:04,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-08-22 23:07:04,933 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:04,934 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 3, 2, 2, 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 23:07:04,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 23:07:04,934 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:04,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:04,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1206849252, now seen corresponding path program 49 times [2020-08-22 23:07:04,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:04,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043455870] [2020-08-22 23:07:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:15,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8636 backedges. 0 proven. 8625 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:07:16,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043455870] [2020-08-22 23:07:16,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:16,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2020-08-22 23:07:16,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100570060] [2020-08-22 23:07:16,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-08-22 23:07:16,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:16,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-08-22 23:07:16,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-08-22 23:07:16,013 INFO L87 Difference]: Start difference. First operand 386 states and 388 transitions. Second operand 104 states. [2020-08-22 23:07:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:34,204 INFO L93 Difference]: Finished difference Result 423 states and 427 transitions. [2020-08-22 23:07:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-08-22 23:07:34,207 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 383 [2020-08-22 23:07:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:34,209 INFO L225 Difference]: With dead ends: 423 [2020-08-22 23:07:34,210 INFO L226 Difference]: Without dead ends: 398 [2020-08-22 23:07:34,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-08-22 23:07:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-08-22 23:07:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 393. [2020-08-22 23:07:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-08-22 23:07:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 395 transitions. [2020-08-22 23:07:34,219 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 395 transitions. Word has length 383 [2020-08-22 23:07:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:34,219 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 395 transitions. [2020-08-22 23:07:34,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-08-22 23:07:34,219 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 395 transitions. [2020-08-22 23:07:34,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-08-22 23:07:34,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:34,222 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 3, 2, 2, 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 23:07:34,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 23:07:34,223 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:34,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:34,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1870142923, now seen corresponding path program 50 times [2020-08-22 23:07:34,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:34,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007662258] [2020-08-22 23:07:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:46,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8987 backedges. 0 proven. 8976 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:07:46,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007662258] [2020-08-22 23:07:46,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:46,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2020-08-22 23:07:46,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911681310] [2020-08-22 23:07:46,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-08-22 23:07:46,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:46,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-08-22 23:07:46,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-08-22 23:07:46,630 INFO L87 Difference]: Start difference. First operand 393 states and 395 transitions. Second operand 106 states. [2020-08-22 23:08:06,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:06,225 INFO L93 Difference]: Finished difference Result 430 states and 434 transitions. [2020-08-22 23:08:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-08-22 23:08:06,228 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 390 [2020-08-22 23:08:06,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:06,230 INFO L225 Difference]: With dead ends: 430 [2020-08-22 23:08:06,230 INFO L226 Difference]: Without dead ends: 405 [2020-08-22 23:08:06,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-08-22 23:08:06,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-08-22 23:08:06,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 400. [2020-08-22 23:08:06,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-22 23:08:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 402 transitions. [2020-08-22 23:08:06,240 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 402 transitions. Word has length 390 [2020-08-22 23:08:06,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:06,240 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 402 transitions. [2020-08-22 23:08:06,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-08-22 23:08:06,241 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 402 transitions. [2020-08-22 23:08:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-08-22 23:08:06,243 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:06,244 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 3, 2, 2, 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 23:08:06,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 23:08:06,244 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:06,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:06,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1663754692, now seen corresponding path program 51 times [2020-08-22 23:08:06,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:06,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432615673] [2020-08-22 23:08:06,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9345 backedges. 0 proven. 9334 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:08:19,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432615673] [2020-08-22 23:08:19,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:19,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2020-08-22 23:08:19,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193421583] [2020-08-22 23:08:19,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-08-22 23:08:19,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:19,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-08-22 23:08:19,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-08-22 23:08:19,774 INFO L87 Difference]: Start difference. First operand 400 states and 402 transitions. Second operand 108 states. [2020-08-22 23:08:41,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:41,683 INFO L93 Difference]: Finished difference Result 437 states and 441 transitions. [2020-08-22 23:08:41,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-08-22 23:08:41,686 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 397 [2020-08-22 23:08:41,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:41,688 INFO L225 Difference]: With dead ends: 437 [2020-08-22 23:08:41,688 INFO L226 Difference]: Without dead ends: 412 [2020-08-22 23:08:41,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-08-22 23:08:41,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-08-22 23:08:41,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 407. [2020-08-22 23:08:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-08-22 23:08:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 409 transitions. [2020-08-22 23:08:41,697 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 409 transitions. Word has length 397 [2020-08-22 23:08:41,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:41,697 INFO L479 AbstractCegarLoop]: Abstraction has 407 states and 409 transitions. [2020-08-22 23:08:41,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-08-22 23:08:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 409 transitions. [2020-08-22 23:08:41,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2020-08-22 23:08:41,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:41,701 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 3, 2, 2, 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 23:08:41,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 23:08:41,701 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:41,702 INFO L82 PathProgramCache]: Analyzing trace with hash 147002197, now seen corresponding path program 52 times [2020-08-22 23:08:41,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:41,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298681785] [2020-08-22 23:08:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:56,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9710 backedges. 0 proven. 9699 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:08:57,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298681785] [2020-08-22 23:08:57,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:57,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2020-08-22 23:08:57,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378985693] [2020-08-22 23:08:57,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-08-22 23:08:57,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:57,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-08-22 23:08:57,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-08-22 23:08:57,004 INFO L87 Difference]: Start difference. First operand 407 states and 409 transitions. Second operand 110 states. [2020-08-22 23:09:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:09:21,526 INFO L93 Difference]: Finished difference Result 444 states and 448 transitions. [2020-08-22 23:09:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-08-22 23:09:21,530 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 404 [2020-08-22 23:09:21,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:09:21,532 INFO L225 Difference]: With dead ends: 444 [2020-08-22 23:09:21,533 INFO L226 Difference]: Without dead ends: 419 [2020-08-22 23:09:21,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-08-22 23:09:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2020-08-22 23:09:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 414. [2020-08-22 23:09:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-08-22 23:09:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 416 transitions. [2020-08-22 23:09:21,542 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 416 transitions. Word has length 404 [2020-08-22 23:09:21,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:09:21,543 INFO L479 AbstractCegarLoop]: Abstraction has 414 states and 416 transitions. [2020-08-22 23:09:21,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-08-22 23:09:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 416 transitions. [2020-08-22 23:09:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-08-22 23:09:21,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:09:21,545 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 3, 2, 2, 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 23:09:21,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 23:09:21,545 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:09:21,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:09:21,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1481387172, now seen corresponding path program 53 times [2020-08-22 23:09:21,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:09:21,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210523466] [2020-08-22 23:09:21,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:09:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:37,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:09:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10082 backedges. 0 proven. 10071 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:09:37,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210523466] [2020-08-22 23:09:37,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:09:37,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2020-08-22 23:09:37,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288510861] [2020-08-22 23:09:37,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-08-22 23:09:37,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:09:37,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-08-22 23:09:37,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-08-22 23:09:37,670 INFO L87 Difference]: Start difference. First operand 414 states and 416 transitions. Second operand 112 states. [2020-08-22 23:10:05,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:10:05,018 INFO L93 Difference]: Finished difference Result 451 states and 455 transitions. [2020-08-22 23:10:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-08-22 23:10:05,021 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 411 [2020-08-22 23:10:05,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:10:05,023 INFO L225 Difference]: With dead ends: 451 [2020-08-22 23:10:05,023 INFO L226 Difference]: Without dead ends: 426 [2020-08-22 23:10:05,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-08-22 23:10:05,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-22 23:10:05,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 421. [2020-08-22 23:10:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-08-22 23:10:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 423 transitions. [2020-08-22 23:10:05,034 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 423 transitions. Word has length 411 [2020-08-22 23:10:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:10:05,035 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 423 transitions. [2020-08-22 23:10:05,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-08-22 23:10:05,035 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 423 transitions. [2020-08-22 23:10:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-08-22 23:10:05,037 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:10:05,038 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 3, 2, 2, 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 23:10:05,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 23:10:05,038 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:10:05,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:10:05,038 INFO L82 PathProgramCache]: Analyzing trace with hash 948030581, now seen corresponding path program 54 times [2020-08-22 23:10:05,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:10:05,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098009069] [2020-08-22 23:10:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:10:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:23,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:10:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10461 backedges. 0 proven. 10450 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:10:23,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098009069] [2020-08-22 23:10:23,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:10:23,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2020-08-22 23:10:23,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291041792] [2020-08-22 23:10:23,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-08-22 23:10:23,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:10:23,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-08-22 23:10:23,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-08-22 23:10:23,975 INFO L87 Difference]: Start difference. First operand 421 states and 423 transitions. Second operand 114 states. [2020-08-22 23:10:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:10:53,415 INFO L93 Difference]: Finished difference Result 458 states and 462 transitions. [2020-08-22 23:10:53,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-08-22 23:10:53,419 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 418 [2020-08-22 23:10:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:10:53,423 INFO L225 Difference]: With dead ends: 458 [2020-08-22 23:10:53,423 INFO L226 Difference]: Without dead ends: 433 [2020-08-22 23:10:53,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-08-22 23:10:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-08-22 23:10:53,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 428. [2020-08-22 23:10:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-08-22 23:10:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 430 transitions. [2020-08-22 23:10:53,433 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 430 transitions. Word has length 418 [2020-08-22 23:10:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:10:53,433 INFO L479 AbstractCegarLoop]: Abstraction has 428 states and 430 transitions. [2020-08-22 23:10:53,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-08-22 23:10:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 430 transitions. [2020-08-22 23:10:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-08-22 23:10:53,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:10:53,436 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 3, 2, 2, 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 23:10:53,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 23:10:53,436 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:10:53,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:10:53,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1281421188, now seen corresponding path program 55 times [2020-08-22 23:10:53,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:10:53,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146276837] [2020-08-22 23:10:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:10:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:13,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:11:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10847 backedges. 0 proven. 10836 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:11:13,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146276837] [2020-08-22 23:11:13,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:11:13,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2020-08-22 23:11:13,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855862434] [2020-08-22 23:11:13,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-08-22 23:11:13,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:11:13,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-08-22 23:11:13,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-08-22 23:11:13,283 INFO L87 Difference]: Start difference. First operand 428 states and 430 transitions. Second operand 116 states. [2020-08-22 23:11:45,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:11:45,802 INFO L93 Difference]: Finished difference Result 465 states and 469 transitions. [2020-08-22 23:11:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-08-22 23:11:45,806 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 425 [2020-08-22 23:11:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:11:45,809 INFO L225 Difference]: With dead ends: 465 [2020-08-22 23:11:45,810 INFO L226 Difference]: Without dead ends: 440 [2020-08-22 23:11:45,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 49.4s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-08-22 23:11:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-08-22 23:11:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 435. [2020-08-22 23:11:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-08-22 23:11:45,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 437 transitions. [2020-08-22 23:11:45,821 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 437 transitions. Word has length 425 [2020-08-22 23:11:45,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:11:45,821 INFO L479 AbstractCegarLoop]: Abstraction has 435 states and 437 transitions. [2020-08-22 23:11:45,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-08-22 23:11:45,821 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 437 transitions. [2020-08-22 23:11:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-08-22 23:11:45,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:11:45,825 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 3, 2, 2, 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 23:11:45,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 23:11:45,825 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:11:45,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:11:45,826 INFO L82 PathProgramCache]: Analyzing trace with hash -822735467, now seen corresponding path program 56 times [2020-08-22 23:11:45,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:11:45,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382459780] [2020-08-22 23:11:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:11:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:08,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:12:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11240 backedges. 0 proven. 11229 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:12:08,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382459780] [2020-08-22 23:12:08,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:12:08,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2020-08-22 23:12:08,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724332257] [2020-08-22 23:12:08,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-08-22 23:12:08,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:12:08,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-08-22 23:12:08,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-08-22 23:12:08,158 INFO L87 Difference]: Start difference. First operand 435 states and 437 transitions. Second operand 118 states. [2020-08-22 23:12:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:12:44,353 INFO L93 Difference]: Finished difference Result 472 states and 476 transitions. [2020-08-22 23:12:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-08-22 23:12:44,358 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 432 [2020-08-22 23:12:44,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:12:44,360 INFO L225 Difference]: With dead ends: 472 [2020-08-22 23:12:44,360 INFO L226 Difference]: Without dead ends: 447 [2020-08-22 23:12:44,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 53.6s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-08-22 23:12:44,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-08-22 23:12:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 442. [2020-08-22 23:12:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-08-22 23:12:44,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 444 transitions. [2020-08-22 23:12:44,375 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 444 transitions. Word has length 432 [2020-08-22 23:12:44,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:12:44,376 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 444 transitions. [2020-08-22 23:12:44,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-08-22 23:12:44,376 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 444 transitions. [2020-08-22 23:12:44,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2020-08-22 23:12:44,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:12:44,380 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 3, 2, 2, 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 23:12:44,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 23:12:44,380 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:12:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:12:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1945578084, now seen corresponding path program 57 times [2020-08-22 23:12:44,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:12:44,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018551756] [2020-08-22 23:12:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:12:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:03,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:13:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11640 backedges. 0 proven. 11629 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:13:03,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018551756] [2020-08-22 23:13:03,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:13:03,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2020-08-22 23:13:03,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557164416] [2020-08-22 23:13:03,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-08-22 23:13:03,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:13:03,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-08-22 23:13:03,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-08-22 23:13:03,304 INFO L87 Difference]: Start difference. First operand 442 states and 444 transitions. Second operand 120 states. [2020-08-22 23:13:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:13:27,885 INFO L93 Difference]: Finished difference Result 479 states and 483 transitions. [2020-08-22 23:13:27,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-08-22 23:13:27,888 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 439 [2020-08-22 23:13:27,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:13:27,890 INFO L225 Difference]: With dead ends: 479 [2020-08-22 23:13:27,891 INFO L226 Difference]: Without dead ends: 454 [2020-08-22 23:13:27,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-08-22 23:13:27,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-08-22 23:13:27,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 449. [2020-08-22 23:13:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-08-22 23:13:27,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 451 transitions. [2020-08-22 23:13:27,900 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 451 transitions. Word has length 439 [2020-08-22 23:13:27,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:13:27,900 INFO L479 AbstractCegarLoop]: Abstraction has 449 states and 451 transitions. [2020-08-22 23:13:27,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-08-22 23:13:27,900 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 451 transitions. [2020-08-22 23:13:27,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-08-22 23:13:27,916 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:13:27,916 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 3, 2, 2, 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 23:13:27,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-22 23:13:27,916 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:13:27,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:13:27,917 INFO L82 PathProgramCache]: Analyzing trace with hash -70134091, now seen corresponding path program 58 times [2020-08-22 23:13:27,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:13:27,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791213092] [2020-08-22 23:13:27,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:13:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:45,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:13:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12047 backedges. 0 proven. 12036 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:13:45,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791213092] [2020-08-22 23:13:45,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:13:45,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2020-08-22 23:13:45,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709387331] [2020-08-22 23:13:45,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-08-22 23:13:45,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:13:45,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-08-22 23:13:45,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-08-22 23:13:45,938 INFO L87 Difference]: Start difference. First operand 449 states and 451 transitions. Second operand 122 states. [2020-08-22 23:14:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:14,433 INFO L93 Difference]: Finished difference Result 486 states and 490 transitions. [2020-08-22 23:14:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-08-22 23:14:14,437 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 446 [2020-08-22 23:14:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:14,441 INFO L225 Difference]: With dead ends: 486 [2020-08-22 23:14:14,441 INFO L226 Difference]: Without dead ends: 461 [2020-08-22 23:14:14,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10442 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=18000, Invalid=39360, Unknown=0, NotChecked=0, Total=57360 [2020-08-22 23:14:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-08-22 23:14:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 456. [2020-08-22 23:14:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-22 23:14:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 458 transitions. [2020-08-22 23:14:14,453 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 458 transitions. Word has length 446 [2020-08-22 23:14:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:14,454 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 458 transitions. [2020-08-22 23:14:14,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 122 states. [2020-08-22 23:14:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 458 transitions. [2020-08-22 23:14:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2020-08-22 23:14:14,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:14,457 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 3, 2, 2, 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 23:14:14,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-22 23:14:14,457 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:14,458 INFO L82 PathProgramCache]: Analyzing trace with hash -216212156, now seen corresponding path program 59 times [2020-08-22 23:14:14,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:14,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346431619] [2020-08-22 23:14:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:32,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12461 backedges. 0 proven. 12450 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 23:14:32,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346431619] [2020-08-22 23:14:32,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:32,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2020-08-22 23:14:32,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976529914] [2020-08-22 23:14:32,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2020-08-22 23:14:32,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:32,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2020-08-22 23:14:32,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=11407, Unknown=0, NotChecked=0, Total=15252 [2020-08-22 23:14:32,903 INFO L87 Difference]: Start difference. First operand 456 states and 458 transitions. Second operand 124 states. [2020-08-22 23:15:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:04,356 INFO L93 Difference]: Finished difference Result 493 states and 497 transitions. [2020-08-22 23:15:04,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-08-22 23:15:04,360 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 453 [2020-08-22 23:15:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:04,363 INFO L225 Difference]: With dead ends: 493 [2020-08-22 23:15:04,363 INFO L226 Difference]: Without dead ends: 468 [2020-08-22 23:15:04,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10799 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=18605, Invalid=40687, Unknown=0, NotChecked=0, Total=59292 [2020-08-22 23:15:04,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-08-22 23:15:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 463. [2020-08-22 23:15:04,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2020-08-22 23:15:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 465 transitions. [2020-08-22 23:15:04,373 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 465 transitions. Word has length 453 [2020-08-22 23:15:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:04,373 INFO L479 AbstractCegarLoop]: Abstraction has 463 states and 465 transitions. [2020-08-22 23:15:04,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 124 states. [2020-08-22 23:15:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 465 transitions. [2020-08-22 23:15:04,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-08-22 23:15:04,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:04,376 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 3, 2, 2, 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 23:15:04,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-08-22 23:15:04,376 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:04,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:04,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1891162155, now seen corresponding path program 60 times [2020-08-22 23:15:04,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:04,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359257966] [2020-08-22 23:15:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat