/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/ldv-regression/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:19:33,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:19:33,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:19:33,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:19:33,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:19:33,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:19:33,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:19:33,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:19:33,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:19:33,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:19:33,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:19:33,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:19:33,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:19:33,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:19:33,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:19:33,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:19:33,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:19:33,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:19:33,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:19:33,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:19:33,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:19:33,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:19:33,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:19:33,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:19:33,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:19:33,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:19:33,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:19:33,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:19:33,502 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 22:19:33,510 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:19:33,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:19:33,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:19:33,512 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:19:33,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:19:33,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:19:33,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:19:33,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:19:33,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:19:33,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:19:33,513 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:19:33,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:19:33,514 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:19:33,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:19:33,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:19:33,514 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:19:33,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:19:33,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:19:33,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:19:33,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:19:33,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:19:33,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:19:33,516 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 22:19:33,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:19:33,810 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:19:33,814 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:19:33,816 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:19:33,816 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:19:33,817 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2020-08-22 22:19:33,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa022f529/a6b0fa7c161a4678b6bf359ea89747de/FLAG9dd7b71db [2020-08-22 22:19:34,319 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:19:34,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test25-2.c [2020-08-22 22:19:34,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa022f529/a6b0fa7c161a4678b6bf359ea89747de/FLAG9dd7b71db [2020-08-22 22:19:34,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa022f529/a6b0fa7c161a4678b6bf359ea89747de [2020-08-22 22:19:34,756 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:19:34,758 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:19:34,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:19:34,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:19:34,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:19:34,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:19:34" (1/1) ... [2020-08-22 22:19:34,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fc2702a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:34, skipping insertion in model container [2020-08-22 22:19:34,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:19:34" (1/1) ... [2020-08-22 22:19:34,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:19:34,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:19:34,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:19:34,967 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:19:34,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:19:35,002 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:19:35,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:35 WrapperNode [2020-08-22 22:19:35,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:19:35,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:19:35,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:19:35,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:19:35,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:35" (1/1) ... [2020-08-22 22:19:35,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:35" (1/1) ... [2020-08-22 22:19:35,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:35" (1/1) ... [2020-08-22 22:19:35,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:35" (1/1) ... [2020-08-22 22:19:35,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:35" (1/1) ... [2020-08-22 22:19:35,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:35" (1/1) ... [2020-08-22 22:19:35,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:35" (1/1) ... [2020-08-22 22:19:35,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:19:35,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:19:35,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:19:35,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:19:35,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:35" (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 22:19:35,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:19:35,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:19:35,181 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-22 22:19:35,181 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:19:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:19:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:19:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 22:19:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 22:19:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 22:19:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:19:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 22:19:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 22:19:35,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 22:19:35,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:19:35,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:19:35,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:19:35,525 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:19:35,525 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 22:19:35,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:19:35 BoogieIcfgContainer [2020-08-22 22:19:35,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:19:35,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:19:35,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:19:35,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:19:35,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:19:34" (1/3) ... [2020-08-22 22:19:35,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c6fdff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:19:35, skipping insertion in model container [2020-08-22 22:19:35,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:35" (2/3) ... [2020-08-22 22:19:35,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c6fdff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:19:35, skipping insertion in model container [2020-08-22 22:19:35,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:19:35" (3/3) ... [2020-08-22 22:19:35,538 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2020-08-22 22:19:35,549 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:19:35,556 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:19:35,570 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:19:35,605 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:19:35,606 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:19:35,606 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:19:35,606 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:19:35,606 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:19:35,606 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:19:35,607 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:19:35,607 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:19:35,624 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-08-22 22:19:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 22:19:35,636 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:35,637 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:35,638 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:35,644 INFO L82 PathProgramCache]: Analyzing trace with hash 144198137, now seen corresponding path program 1 times [2020-08-22 22:19:35,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:35,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121212173] [2020-08-22 22:19:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 22:19:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,885 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 22:19:35,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121212173] [2020-08-22 22:19:35,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:19:35,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:19:35,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758051081] [2020-08-22 22:19:35,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:19:35,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:35,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:19:35,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:19:35,919 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 3 states. [2020-08-22 22:19:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:36,092 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-08-22 22:19:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:19:36,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-08-22 22:19:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:36,104 INFO L225 Difference]: With dead ends: 124 [2020-08-22 22:19:36,105 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 22:19:36,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:19:36,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 22:19:36,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 22:19:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 22:19:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 22:19:36,159 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 44 [2020-08-22 22:19:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:36,160 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 22:19:36,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:19:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 22:19:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 22:19:36,162 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:36,163 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:36,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:19:36,163 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:36,164 INFO L82 PathProgramCache]: Analyzing trace with hash 608042528, now seen corresponding path program 1 times [2020-08-22 22:19:36,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:36,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645779094] [2020-08-22 22:19:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 22:19:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,289 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 22:19:36,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645779094] [2020-08-22 22:19:36,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:19:36,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 22:19:36,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41595534] [2020-08-22 22:19:36,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 22:19:36,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:36,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 22:19:36,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 22:19:36,294 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 4 states. [2020-08-22 22:19:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:36,430 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-08-22 22:19:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 22:19:36,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-08-22 22:19:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:36,433 INFO L225 Difference]: With dead ends: 104 [2020-08-22 22:19:36,433 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 22:19:36,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 22:19:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 22:19:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-08-22 22:19:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 22:19:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-08-22 22:19:36,448 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 46 [2020-08-22 22:19:36,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:36,449 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-08-22 22:19:36,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 22:19:36,449 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-08-22 22:19:36,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 22:19:36,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:36,451 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, 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, 1, 1, 1, 1] [2020-08-22 22:19:36,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:19:36,452 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:36,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1644606330, now seen corresponding path program 1 times [2020-08-22 22:19:36,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:36,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728937397] [2020-08-22 22:19:36,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 22:19:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,584 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 22:19:36,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728937397] [2020-08-22 22:19:36,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:36,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 22:19:36,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110465410] [2020-08-22 22:19:36,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 22:19:36,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:36,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 22:19:36,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:19:36,587 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 6 states. [2020-08-22 22:19:36,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:36,745 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-08-22 22:19:36,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:19:36,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-22 22:19:36,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:36,747 INFO L225 Difference]: With dead ends: 114 [2020-08-22 22:19:36,747 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 22:19:36,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 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 22:19:36,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 22:19:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-08-22 22:19:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 22:19:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-08-22 22:19:36,760 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 56 [2020-08-22 22:19:36,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:36,760 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-08-22 22:19:36,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 22:19:36,760 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-08-22 22:19:36,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 22:19:36,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:36,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 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, 1] [2020-08-22 22:19:36,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:19:36,763 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:36,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:36,763 INFO L82 PathProgramCache]: Analyzing trace with hash 278397012, now seen corresponding path program 2 times [2020-08-22 22:19:36,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:36,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676278066] [2020-08-22 22:19:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 22:19:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:36,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676278066] [2020-08-22 22:19:36,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:36,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 22:19:36,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528308991] [2020-08-22 22:19:36,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:19:36,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:36,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:19:36,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:19:36,950 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 8 states. [2020-08-22 22:19:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:37,161 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-08-22 22:19:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 22:19:37,161 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-22 22:19:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:37,163 INFO L225 Difference]: With dead ends: 124 [2020-08-22 22:19:37,163 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 22:19:37,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 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 22:19:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 22:19:37,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-08-22 22:19:37,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 22:19:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-22 22:19:37,182 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 66 [2020-08-22 22:19:37,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:37,184 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-22 22:19:37,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:19:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-22 22:19:37,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 22:19:37,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:37,186 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 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, 1] [2020-08-22 22:19:37,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:19:37,190 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:37,190 INFO L82 PathProgramCache]: Analyzing trace with hash 767198382, now seen corresponding path program 3 times [2020-08-22 22:19:37,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:37,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206382953] [2020-08-22 22:19:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:37,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:37,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 22:19:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:37,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206382953] [2020-08-22 22:19:37,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:37,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 22:19:37,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617779596] [2020-08-22 22:19:37,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:19:37,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:37,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:19:37,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:19:37,396 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 10 states. [2020-08-22 22:19:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:37,649 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2020-08-22 22:19:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 22:19:37,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-08-22 22:19:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:37,651 INFO L225 Difference]: With dead ends: 134 [2020-08-22 22:19:37,651 INFO L226 Difference]: Without dead ends: 99 [2020-08-22 22:19:37,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 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 22:19:37,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-22 22:19:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2020-08-22 22:19:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 22:19:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-08-22 22:19:37,663 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 76 [2020-08-22 22:19:37,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:37,663 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-08-22 22:19:37,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:19:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-08-22 22:19:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 22:19:37,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:37,665 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:37,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:19:37,666 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:37,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:37,666 INFO L82 PathProgramCache]: Analyzing trace with hash 216981640, now seen corresponding path program 4 times [2020-08-22 22:19:37,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:37,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581510798] [2020-08-22 22:19:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:37,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:37,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 22:19:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:37,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581510798] [2020-08-22 22:19:37,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:37,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 22:19:37,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797473000] [2020-08-22 22:19:37,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 22:19:37,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:37,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 22:19:37,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:19:37,810 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 12 states. [2020-08-22 22:19:38,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:38,034 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-08-22 22:19:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 22:19:38,035 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-08-22 22:19:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:38,037 INFO L225 Difference]: With dead ends: 144 [2020-08-22 22:19:38,037 INFO L226 Difference]: Without dead ends: 109 [2020-08-22 22:19:38,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 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 22:19:38,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-22 22:19:38,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-08-22 22:19:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 22:19:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-08-22 22:19:38,049 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 86 [2020-08-22 22:19:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:38,050 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-08-22 22:19:38,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 22:19:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-08-22 22:19:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 22:19:38,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:38,051 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:38,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:19:38,052 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:38,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:38,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1855081502, now seen corresponding path program 5 times [2020-08-22 22:19:38,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:38,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516344544] [2020-08-22 22:19:38,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:38,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:38,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 22:19:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:38,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516344544] [2020-08-22 22:19:38,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:38,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:19:38,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416077316] [2020-08-22 22:19:38,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:19:38,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:38,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:19:38,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:19:38,275 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 14 states. [2020-08-22 22:19:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:38,594 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2020-08-22 22:19:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 22:19:38,594 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 96 [2020-08-22 22:19:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:38,596 INFO L225 Difference]: With dead ends: 154 [2020-08-22 22:19:38,596 INFO L226 Difference]: Without dead ends: 119 [2020-08-22 22:19:38,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 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 22:19:38,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-08-22 22:19:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2020-08-22 22:19:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-22 22:19:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-08-22 22:19:38,608 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 96 [2020-08-22 22:19:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:38,608 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-08-22 22:19:38,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:19:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-08-22 22:19:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 22:19:38,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:38,610 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:38,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:19:38,611 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:38,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:38,611 INFO L82 PathProgramCache]: Analyzing trace with hash -400056644, now seen corresponding path program 6 times [2020-08-22 22:19:38,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:38,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870821345] [2020-08-22 22:19:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:38,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:38,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 22:19:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:38,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870821345] [2020-08-22 22:19:38,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:38,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 22:19:38,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743539941] [2020-08-22 22:19:38,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 22:19:38,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:38,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 22:19:38,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:19:38,793 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 16 states. [2020-08-22 22:19:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:39,176 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2020-08-22 22:19:39,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 22:19:39,177 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 106 [2020-08-22 22:19:39,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:39,178 INFO L225 Difference]: With dead ends: 164 [2020-08-22 22:19:39,178 INFO L226 Difference]: Without dead ends: 129 [2020-08-22 22:19:39,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 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 22:19:39,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-22 22:19:39,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2020-08-22 22:19:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-08-22 22:19:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-08-22 22:19:39,188 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 106 [2020-08-22 22:19:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:39,189 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-08-22 22:19:39,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 22:19:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-08-22 22:19:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 22:19:39,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:39,191 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:39,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:19:39,191 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:39,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1044037354, now seen corresponding path program 7 times [2020-08-22 22:19:39,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:39,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422103325] [2020-08-22 22:19:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:39,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:39,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 22:19:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:39,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422103325] [2020-08-22 22:19:39,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:39,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 22:19:39,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16210535] [2020-08-22 22:19:39,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 22:19:39,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:39,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 22:19:39,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-22 22:19:39,407 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 18 states. [2020-08-22 22:19:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:39,847 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2020-08-22 22:19:39,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 22:19:39,848 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 116 [2020-08-22 22:19:39,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:39,850 INFO L225 Difference]: With dead ends: 174 [2020-08-22 22:19:39,850 INFO L226 Difference]: Without dead ends: 139 [2020-08-22 22:19:39,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 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 22:19:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-22 22:19:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2020-08-22 22:19:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 22:19:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2020-08-22 22:19:39,873 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 116 [2020-08-22 22:19:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:39,873 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2020-08-22 22:19:39,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 22:19:39,875 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2020-08-22 22:19:39,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 22:19:39,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:39,881 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:39,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:19:39,881 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:39,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:39,881 INFO L82 PathProgramCache]: Analyzing trace with hash 212286192, now seen corresponding path program 8 times [2020-08-22 22:19:39,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:39,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582287093] [2020-08-22 22:19:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:40,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:40,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 22:19:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:40,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582287093] [2020-08-22 22:19:40,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:40,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 22:19:40,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160747130] [2020-08-22 22:19:40,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 22:19:40,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:40,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 22:19:40,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-08-22 22:19:40,285 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 20 states. [2020-08-22 22:19:40,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:40,869 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2020-08-22 22:19:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 22:19:40,869 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 126 [2020-08-22 22:19:40,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:40,871 INFO L225 Difference]: With dead ends: 184 [2020-08-22 22:19:40,871 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 22:19:40,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 22:19:40,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 22:19:40,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2020-08-22 22:19:40,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-08-22 22:19:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-08-22 22:19:40,887 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 126 [2020-08-22 22:19:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:40,888 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-08-22 22:19:40,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 22:19:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-08-22 22:19:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 22:19:40,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:40,889 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:40,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:19:40,890 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:40,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:40,890 INFO L82 PathProgramCache]: Analyzing trace with hash 786836554, now seen corresponding path program 9 times [2020-08-22 22:19:40,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:40,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294241251] [2020-08-22 22:19:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:41,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:41,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 22:19:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:41,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294241251] [2020-08-22 22:19:41,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:41,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 22:19:41,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011107441] [2020-08-22 22:19:41,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 22:19:41,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:41,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 22:19:41,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-08-22 22:19:41,235 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 22 states. [2020-08-22 22:19:41,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:41,918 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2020-08-22 22:19:41,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 22:19:41,923 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 136 [2020-08-22 22:19:41,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:41,925 INFO L225 Difference]: With dead ends: 186 [2020-08-22 22:19:41,925 INFO L226 Difference]: Without dead ends: 151 [2020-08-22 22:19:41,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 22:19:41,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-22 22:19:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-08-22 22:19:41,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-08-22 22:19:41,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2020-08-22 22:19:41,943 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 136 [2020-08-22 22:19:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:41,944 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2020-08-22 22:19:41,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 22:19:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2020-08-22 22:19:41,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 22:19:41,948 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:41,948 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:41,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:19:41,949 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:41,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:41,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1068321500, now seen corresponding path program 10 times [2020-08-22 22:19:41,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:41,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116181625] [2020-08-22 22:19:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:50,398 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 9 [2020-08-22 22:20:50,701 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 8 [2020-08-22 22:20:51,697 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 8 [2020-08-22 22:20:52,784 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 11 [2020-08-22 22:20:57,571 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 1070 DAG size of output: 8 [2020-08-22 22:21:01,825 WARN L193 SmtUtils]: Spent 3.62 s on a formula simplification. DAG size of input: 1063 DAG size of output: 8 [2020-08-22 22:21:35,803 WARN L193 SmtUtils]: Spent 32.86 s on a formula simplification. DAG size of input: 2453 DAG size of output: 8 [2020-08-22 22:22:03,281 WARN L193 SmtUtils]: Spent 26.24 s on a formula simplification. DAG size of input: 2458 DAG size of output: 8 [2020-08-22 22:25:09,347 WARN L193 SmtUtils]: Spent 3.04 m on a formula simplification. DAG size of input: 6202 DAG size of output: 8 [2020-08-22 22:25:09,941 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2020-08-22 22:25:10,127 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-08-22 22:25:10,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:25:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:25:10,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 22:25:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:25:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:25:10,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116181625] [2020-08-22 22:25:10,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:25:10,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 22:25:10,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487830758] [2020-08-22 22:25:10,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 22:25:10,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:25:10,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 22:25:10,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-08-22 22:25:10,521 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 31 states. [2020-08-22 22:25:12,724 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2020-08-22 22:25:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:25:13,179 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2020-08-22 22:25:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 22:25:13,179 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 146 [2020-08-22 22:25:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:25:13,180 INFO L225 Difference]: With dead ends: 172 [2020-08-22 22:25:13,180 INFO L226 Difference]: Without dead ends: 156 [2020-08-22 22:25:13,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 260.3s TimeCoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 22:25:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-08-22 22:25:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-08-22 22:25:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-08-22 22:25:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-08-22 22:25:13,193 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 146 [2020-08-22 22:25:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:25:13,194 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-08-22 22:25:13,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 22:25:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-08-22 22:25:13,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-22 22:25:13,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:25:13,196 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 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 22:25:13,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 22:25:13,196 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:25:13,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:25:13,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1165083452, now seen corresponding path program 1 times [2020-08-22 22:25:13,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:25:13,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354921107] [2020-08-22 22:25:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:25:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:25:23,975 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 8 [2020-08-22 22:25:24,162 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 8 [2020-08-22 22:25:24,973 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 8 [2020-08-22 22:25:25,869 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 8 [2020-08-22 22:25:28,882 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 543 DAG size of output: 8 [2020-08-22 22:25:29,436 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 31 [2020-08-22 22:25:29,631 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-08-22 22:25:30,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:25:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:25:30,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 22:25:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:25:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:25:30,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354921107] [2020-08-22 22:25:30,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:25:30,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 22:25:30,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153902343] [2020-08-22 22:25:30,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 22:25:30,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:25:30,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 22:25:30,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 22:25:30,689 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 41 states. [2020-08-22 22:25:33,178 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-08-22 22:25:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:25:34,602 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2020-08-22 22:25:34,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 22:25:34,603 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 152 [2020-08-22 22:25:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:25:34,605 INFO L225 Difference]: With dead ends: 169 [2020-08-22 22:25:34,606 INFO L226 Difference]: Without dead ends: 162 [2020-08-22 22:25:34,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=378, Invalid=5784, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 22:25:34,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-22 22:25:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2020-08-22 22:25:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-08-22 22:25:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2020-08-22 22:25:34,623 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 152 [2020-08-22 22:25:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:25:34,623 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2020-08-22 22:25:34,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 22:25:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2020-08-22 22:25:34,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-08-22 22:25:34,625 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:25:34,625 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:25:34,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 22:25:34,626 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:25:34,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:25:34,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1004282028, now seen corresponding path program 2 times [2020-08-22 22:25:34,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:25:34,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645097128] [2020-08-22 22:25:34,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:25:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:26:04,854 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 8 [2020-08-22 22:26:05,302 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 8 [2020-08-22 22:26:07,489 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 690 DAG size of output: 8 [2020-08-22 22:26:09,307 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 692 DAG size of output: 8 [2020-08-22 22:26:23,615 WARN L193 SmtUtils]: Spent 13.32 s on a formula simplification. DAG size of input: 2042 DAG size of output: 8 [2020-08-22 22:26:40,572 WARN L193 SmtUtils]: Spent 15.83 s on a formula simplification. DAG size of input: 2089 DAG size of output: 8 [2020-08-22 22:27:31,538 WARN L193 SmtUtils]: Spent 49.01 s on a formula simplification. DAG size of input: 3922 DAG size of output: 8 [2020-08-22 22:28:29,368 WARN L193 SmtUtils]: Spent 55.61 s on a formula simplification. DAG size of input: 4069 DAG size of output: 8 [2020-08-22 22:30:27,384 WARN L193 SmtUtils]: Spent 1.91 m on a formula simplification. DAG size of input: 5805 DAG size of output: 8 [2020-08-22 22:30:27,788 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 22 [2020-08-22 22:30:28,210 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 28 [2020-08-22 22:30:28,736 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 31 [2020-08-22 22:30:29,185 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 25 [2020-08-22 22:30:29,486 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2020-08-22 22:30:29,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:30:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:30:29,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-22 22:30:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:30:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:30:30,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645097128] [2020-08-22 22:30:30,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:30:30,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 22:30:30,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107361193] [2020-08-22 22:30:30,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 22:30:30,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:30:30,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 22:30:30,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 22:30:30,018 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 33 states. [2020-08-22 22:30:34,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:30:34,996 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2020-08-22 22:30:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-22 22:30:34,998 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 158 [2020-08-22 22:30:34,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:30:35,001 INFO L225 Difference]: With dead ends: 184 [2020-08-22 22:30:35,001 INFO L226 Difference]: Without dead ends: 168 [2020-08-22 22:30:35,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 266.1s TimeCoverageRelationStatistics Valid=263, Invalid=3277, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 22:30:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-22 22:30:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2020-08-22 22:30:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-08-22 22:30:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2020-08-22 22:30:35,015 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 158 [2020-08-22 22:30:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:30:35,015 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2020-08-22 22:30:35,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 22:30:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2020-08-22 22:30:35,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-08-22 22:30:35,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:30:35,017 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:30:35,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 22:30:35,018 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:30:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:30:35,018 INFO L82 PathProgramCache]: Analyzing trace with hash 426150252, now seen corresponding path program 3 times [2020-08-22 22:30:35,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:30:35,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885704419] [2020-08-22 22:30:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:30:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:31:11,720 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 11 [2020-08-22 22:31:12,958 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 11 [2020-08-22 22:31:13,673 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 8 [2020-08-22 22:31:17,063 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 811 DAG size of output: 8 [2020-08-22 22:31:20,078 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 818 DAG size of output: 8 [2020-08-22 22:31:55,314 WARN L193 SmtUtils]: Spent 32.82 s on a formula simplification. DAG size of input: 4189 DAG size of output: 8 [2020-08-22 22:32:35,405 WARN L193 SmtUtils]: Spent 37.04 s on a formula simplification. DAG size of input: 4230 DAG size of output: 8