/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 00:38:34,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 00:38:34,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 00:38:35,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 00:38:35,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 00:38:35,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 00:38:35,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 00:38:35,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 00:38:35,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 00:38:35,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 00:38:35,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 00:38:35,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 00:38:35,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 00:38:35,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 00:38:35,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 00:38:35,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 00:38:35,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 00:38:35,090 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 00:38:35,116 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 00:38:35,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 00:38:35,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 00:38:35,120 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 00:38:35,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 00:38:35,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 00:38:35,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 00:38:35,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 00:38:35,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 00:38:35,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 00:38:35,122 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 00:38:35,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 00:38:35,123 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 00:38:35,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 00:38:35,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 00:38:35,123 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 00:38:35,124 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 00:38:35,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 00:38:35,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:38:35,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 00:38:35,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 00:38:35,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 00:38:35,125 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 00:38:35,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 00:38:35,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 00:38:35,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 00:38:35,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 00:38:35,603 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 00:38:35,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-10-24 00:38:35,708 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d44dd78a/1ca2d6bfeced4542baada6e637929897/FLAG6c5b0ae16 [2020-10-24 00:38:36,372 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 00:38:36,373 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-10-24 00:38:36,380 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d44dd78a/1ca2d6bfeced4542baada6e637929897/FLAG6c5b0ae16 [2020-10-24 00:38:36,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d44dd78a/1ca2d6bfeced4542baada6e637929897 [2020-10-24 00:38:36,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 00:38:36,758 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 00:38:36,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 00:38:36,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 00:38:36,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 00:38:36,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:38:36" (1/1) ... [2020-10-24 00:38:36,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32fac3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:36, skipping insertion in model container [2020-10-24 00:38:36,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:38:36" (1/1) ... [2020-10-24 00:38:36,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 00:38:36,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 00:38:36,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:38:36,974 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 00:38:36,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:38:37,010 INFO L208 MainTranslator]: Completed translation [2020-10-24 00:38:37,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:37 WrapperNode [2020-10-24 00:38:37,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 00:38:37,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 00:38:37,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 00:38:37,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 00:38:37,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:37" (1/1) ... [2020-10-24 00:38:37,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:37" (1/1) ... [2020-10-24 00:38:37,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:37" (1/1) ... [2020-10-24 00:38:37,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:37" (1/1) ... [2020-10-24 00:38:37,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:37" (1/1) ... [2020-10-24 00:38:37,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:37" (1/1) ... [2020-10-24 00:38:37,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:37" (1/1) ... [2020-10-24 00:38:37,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 00:38:37,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 00:38:37,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 00:38:37,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 00:38:37,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:37" (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 [2020-10-24 00:38:37,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 00:38:37,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 00:38:37,139 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 00:38:37,139 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-10-24 00:38:37,139 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 00:38:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 00:38:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 00:38:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 00:38:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 00:38:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 00:38:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-10-24 00:38:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 00:38:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 00:38:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 00:38:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 00:38:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 00:38:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 00:38:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 00:38:37,409 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 00:38:37,410 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-24 00:38:37,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:38:37 BoogieIcfgContainer [2020-10-24 00:38:37,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 00:38:37,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 00:38:37,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 00:38:37,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 00:38:37,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:38:36" (1/3) ... [2020-10-24 00:38:37,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec1a61e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:38:37, skipping insertion in model container [2020-10-24 00:38:37,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:37" (2/3) ... [2020-10-24 00:38:37,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec1a61e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:38:37, skipping insertion in model container [2020-10-24 00:38:37,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:38:37" (3/3) ... [2020-10-24 00:38:37,424 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-10-24 00:38:37,438 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 00:38:37,445 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 00:38:37,467 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 00:38:37,512 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 00:38:37,512 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 00:38:37,512 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 00:38:37,512 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 00:38:37,512 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 00:38:37,513 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 00:38:37,516 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 00:38:37,516 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 00:38:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-24 00:38:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-24 00:38:37,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:37,596 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 00:38:37,597 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:37,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1781058716, now seen corresponding path program 1 times [2020-10-24 00:38:37,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:37,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414553801] [2020-10-24 00:38:37,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:38,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:38,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:38,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-24 00:38:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-24 00:38:38,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414553801] [2020-10-24 00:38:38,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:38:38,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-24 00:38:38,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147290084] [2020-10-24 00:38:38,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 00:38:38,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:38,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 00:38:38,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-24 00:38:38,178 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 9 states. [2020-10-24 00:38:39,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:39,104 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2020-10-24 00:38:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 00:38:39,106 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-24 00:38:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:39,119 INFO L225 Difference]: With dead ends: 87 [2020-10-24 00:38:39,119 INFO L226 Difference]: Without dead ends: 60 [2020-10-24 00:38:39,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-24 00:38:39,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-24 00:38:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2020-10-24 00:38:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-24 00:38:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-24 00:38:39,189 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 45 [2020-10-24 00:38:39,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:39,190 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-24 00:38:39,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 00:38:39,191 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-24 00:38:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-24 00:38:39,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:39,195 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-24 00:38:39,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 00:38:39,196 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:39,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:39,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1209040977, now seen corresponding path program 1 times [2020-10-24 00:38:39,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:39,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017387537] [2020-10-24 00:38:39,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:39,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:39,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:39,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-24 00:38:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:39,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:38:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-24 00:38:39,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017387537] [2020-10-24 00:38:39,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:38:39,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-24 00:38:39,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986919319] [2020-10-24 00:38:39,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 00:38:39,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:39,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 00:38:39,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-24 00:38:39,410 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 11 states. [2020-10-24 00:38:40,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:40,068 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2020-10-24 00:38:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 00:38:40,068 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-10-24 00:38:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:40,071 INFO L225 Difference]: With dead ends: 93 [2020-10-24 00:38:40,071 INFO L226 Difference]: Without dead ends: 65 [2020-10-24 00:38:40,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-24 00:38:40,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-24 00:38:40,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-10-24 00:38:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-24 00:38:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2020-10-24 00:38:40,095 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 54 [2020-10-24 00:38:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:40,096 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2020-10-24 00:38:40,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 00:38:40,096 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2020-10-24 00:38:40,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-24 00:38:40,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:40,099 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-24 00:38:40,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 00:38:40,100 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:40,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:40,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1581273073, now seen corresponding path program 1 times [2020-10-24 00:38:40,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:40,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611828357] [2020-10-24 00:38:40,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:40,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:40,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:40,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-24 00:38:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:40,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-24 00:38:40,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611828357] [2020-10-24 00:38:40,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:38:40,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 00:38:40,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705882220] [2020-10-24 00:38:40,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 00:38:40,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:40,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 00:38:40,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 00:38:40,273 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 6 states. [2020-10-24 00:38:40,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:40,579 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2020-10-24 00:38:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 00:38:40,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-24 00:38:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:40,581 INFO L225 Difference]: With dead ends: 71 [2020-10-24 00:38:40,582 INFO L226 Difference]: Without dead ends: 56 [2020-10-24 00:38:40,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-24 00:38:40,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-24 00:38:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-24 00:38:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-24 00:38:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-24 00:38:40,600 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 55 [2020-10-24 00:38:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:40,601 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-24 00:38:40,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 00:38:40,601 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-24 00:38:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-24 00:38:40,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:40,603 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-24 00:38:40,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 00:38:40,604 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:40,604 INFO L82 PathProgramCache]: Analyzing trace with hash -176089127, now seen corresponding path program 2 times [2020-10-24 00:38:40,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:40,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562085868] [2020-10-24 00:38:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:40,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:40,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:40,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:40,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-24 00:38:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-24 00:38:40,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562085868] [2020-10-24 00:38:40,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:38:40,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 00:38:40,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612876768] [2020-10-24 00:38:40,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 00:38:40,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:40,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 00:38:40,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 00:38:40,721 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 6 states. [2020-10-24 00:38:41,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:41,005 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2020-10-24 00:38:41,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 00:38:41,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-24 00:38:41,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:41,008 INFO L225 Difference]: With dead ends: 63 [2020-10-24 00:38:41,008 INFO L226 Difference]: Without dead ends: 56 [2020-10-24 00:38:41,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-24 00:38:41,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-24 00:38:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-24 00:38:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-24 00:38:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-24 00:38:41,023 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 55 [2020-10-24 00:38:41,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:41,024 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-24 00:38:41,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 00:38:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-24 00:38:41,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-24 00:38:41,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:41,028 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 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] [2020-10-24 00:38:41,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 00:38:41,028 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:41,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:41,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1906928364, now seen corresponding path program 1 times [2020-10-24 00:38:41,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:41,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342338179] [2020-10-24 00:38:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:41,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:41,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:41,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:41,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-24 00:38:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:41,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:41,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:38:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:41,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-24 00:38:41,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342338179] [2020-10-24 00:38:41,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:38:41,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 00:38:41,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474543249] [2020-10-24 00:38:41,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 00:38:41,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:41,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 00:38:41,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-24 00:38:41,211 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 7 states. [2020-10-24 00:38:41,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:41,574 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-10-24 00:38:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 00:38:41,574 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-24 00:38:41,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:41,577 INFO L225 Difference]: With dead ends: 86 [2020-10-24 00:38:41,577 INFO L226 Difference]: Without dead ends: 45 [2020-10-24 00:38:41,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-24 00:38:41,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-24 00:38:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-24 00:38:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-24 00:38:41,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-24 00:38:41,589 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 84 [2020-10-24 00:38:41,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:41,590 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-24 00:38:41,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 00:38:41,590 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-24 00:38:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-24 00:38:41,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:41,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-10-24 00:38:41,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 00:38:41,592 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:41,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:41,593 INFO L82 PathProgramCache]: Analyzing trace with hash -35502524, now seen corresponding path program 3 times [2020-10-24 00:38:41,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:41,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270179087] [2020-10-24 00:38:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:41,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:41,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:41,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:41,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-24 00:38:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:42,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-24 00:38:42,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270179087] [2020-10-24 00:38:42,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:38:42,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 00:38:42,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240342876] [2020-10-24 00:38:42,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 00:38:42,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:42,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 00:38:42,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-24 00:38:42,051 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2020-10-24 00:38:43,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:43,584 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-10-24 00:38:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 00:38:43,584 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-10-24 00:38:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:43,588 INFO L225 Difference]: With dead ends: 66 [2020-10-24 00:38:43,589 INFO L226 Difference]: Without dead ends: 59 [2020-10-24 00:38:43,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 00:38:43,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-24 00:38:43,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-10-24 00:38:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-24 00:38:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-24 00:38:43,628 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 65 [2020-10-24 00:38:43,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:43,628 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-24 00:38:43,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 00:38:43,628 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-24 00:38:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-24 00:38:43,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:43,630 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2020-10-24 00:38:43,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 00:38:43,632 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2084461945, now seen corresponding path program 4 times [2020-10-24 00:38:43,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:43,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954218227] [2020-10-24 00:38:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:43,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:43,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:43,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:43,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-24 00:38:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:44,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:44,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-24 00:38:44,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954218227] [2020-10-24 00:38:44,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:38:44,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-24 00:38:44,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294231273] [2020-10-24 00:38:44,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-24 00:38:44,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:44,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-24 00:38:44,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-10-24 00:38:44,256 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 21 states. [2020-10-24 00:38:46,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:46,050 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-10-24 00:38:46,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 00:38:46,051 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 75 [2020-10-24 00:38:46,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:46,052 INFO L225 Difference]: With dead ends: 71 [2020-10-24 00:38:46,052 INFO L226 Difference]: Without dead ends: 64 [2020-10-24 00:38:46,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 00:38:46,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-24 00:38:46,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-10-24 00:38:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-24 00:38:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-24 00:38:46,073 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 75 [2020-10-24 00:38:46,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:46,074 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-24 00:38:46,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-24 00:38:46,074 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-24 00:38:46,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-24 00:38:46,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:46,076 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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] [2020-10-24 00:38:46,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 00:38:46,077 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:46,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:46,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1152977444, now seen corresponding path program 5 times [2020-10-24 00:38:46,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:46,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633838194] [2020-10-24 00:38:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:46,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:46,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:46,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:46,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-24 00:38:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:46,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:46,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:46,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 17 proven. 61 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-24 00:38:46,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633838194] [2020-10-24 00:38:46,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:38:46,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-24 00:38:46,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314626855] [2020-10-24 00:38:46,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-24 00:38:46,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:46,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-24 00:38:46,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-10-24 00:38:46,880 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 23 states. [2020-10-24 00:38:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:49,076 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2020-10-24 00:38:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 00:38:49,077 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-10-24 00:38:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:49,078 INFO L225 Difference]: With dead ends: 76 [2020-10-24 00:38:49,078 INFO L226 Difference]: Without dead ends: 69 [2020-10-24 00:38:49,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 00:38:49,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-24 00:38:49,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-10-24 00:38:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-24 00:38:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-10-24 00:38:49,107 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 85 [2020-10-24 00:38:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:49,108 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-10-24 00:38:49,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-24 00:38:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-10-24 00:38:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-24 00:38:49,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:49,109 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-10-24 00:38:49,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 00:38:49,110 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:49,112 INFO L82 PathProgramCache]: Analyzing trace with hash 644328217, now seen corresponding path program 6 times [2020-10-24 00:38:49,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:49,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627623542] [2020-10-24 00:38:49,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:49,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:49,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:49,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:49,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-24 00:38:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:49,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:49,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:49,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:49,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 22 proven. 88 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-24 00:38:49,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627623542] [2020-10-24 00:38:49,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:38:49,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 00:38:49,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379859266] [2020-10-24 00:38:49,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 00:38:49,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:49,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 00:38:49,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-24 00:38:49,918 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 25 states. [2020-10-24 00:38:52,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:52,534 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-10-24 00:38:52,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-24 00:38:52,535 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-10-24 00:38:52,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:52,537 INFO L225 Difference]: With dead ends: 81 [2020-10-24 00:38:52,537 INFO L226 Difference]: Without dead ends: 74 [2020-10-24 00:38:52,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=328, Invalid=2024, Unknown=0, NotChecked=0, Total=2352 [2020-10-24 00:38:52,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-24 00:38:52,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2020-10-24 00:38:52,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-24 00:38:52,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2020-10-24 00:38:52,570 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 95 [2020-10-24 00:38:52,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:52,572 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2020-10-24 00:38:52,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 00:38:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2020-10-24 00:38:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-24 00:38:52,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:52,573 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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] [2020-10-24 00:38:52,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 00:38:52,574 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:52,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1926544540, now seen corresponding path program 7 times [2020-10-24 00:38:52,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:52,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007396564] [2020-10-24 00:38:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:52,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:52,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:52,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:52,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:53,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-24 00:38:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:53,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:53,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-24 00:38:53,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007396564] [2020-10-24 00:38:53,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:38:53,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 00:38:53,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044840431] [2020-10-24 00:38:53,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 00:38:53,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:53,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 00:38:53,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-24 00:38:53,169 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand 18 states. [2020-10-24 00:38:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:54,615 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2020-10-24 00:38:54,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 00:38:54,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-10-24 00:38:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:54,617 INFO L225 Difference]: With dead ends: 85 [2020-10-24 00:38:54,618 INFO L226 Difference]: Without dead ends: 78 [2020-10-24 00:38:54,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 00:38:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-24 00:38:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-10-24 00:38:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-24 00:38:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2020-10-24 00:38:54,639 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 85 [2020-10-24 00:38:54,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:54,640 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2020-10-24 00:38:54,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 00:38:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2020-10-24 00:38:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-24 00:38:54,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:54,642 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-10-24 00:38:54,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 00:38:54,642 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:54,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:54,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1618724431, now seen corresponding path program 8 times [2020-10-24 00:38:54,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:54,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791210350] [2020-10-24 00:38:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:54,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:54,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:54,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:54,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:55,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-24 00:38:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:55,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:55,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:55,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 19 proven. 95 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-10-24 00:38:55,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791210350] [2020-10-24 00:38:55,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:38:55,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 00:38:55,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571472009] [2020-10-24 00:38:55,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 00:38:55,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:55,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 00:38:55,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-24 00:38:55,350 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 25 states. [2020-10-24 00:38:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:57,914 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-10-24 00:38:57,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 00:38:57,915 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-10-24 00:38:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:57,916 INFO L225 Difference]: With dead ends: 85 [2020-10-24 00:38:57,916 INFO L226 Difference]: Without dead ends: 78 [2020-10-24 00:38:57,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 00:38:57,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-24 00:38:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-10-24 00:38:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-24 00:38:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2020-10-24 00:38:57,959 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 95 [2020-10-24 00:38:57,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:57,959 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2020-10-24 00:38:57,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 00:38:57,959 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2020-10-24 00:38:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-24 00:38:57,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:57,962 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-10-24 00:38:57,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 00:38:57,962 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:57,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:57,963 INFO L82 PathProgramCache]: Analyzing trace with hash -312906364, now seen corresponding path program 9 times [2020-10-24 00:38:57,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:57,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101092853] [2020-10-24 00:38:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:58,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:58,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:58,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:58,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:58,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-24 00:38:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:58,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:58,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:58,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:58,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:38:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 24 proven. 129 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-24 00:38:58,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101092853] [2020-10-24 00:38:58,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:38:58,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-24 00:38:58,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560194897] [2020-10-24 00:38:58,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-24 00:38:58,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:58,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-24 00:38:58,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-10-24 00:38:58,869 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 27 states. [2020-10-24 00:38:59,746 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:39:00,238 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-24 00:39:01,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:01,726 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-10-24 00:39:01,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-24 00:39:01,727 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2020-10-24 00:39:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:01,728 INFO L225 Difference]: With dead ends: 85 [2020-10-24 00:39:01,728 INFO L226 Difference]: Without dead ends: 78 [2020-10-24 00:39:01,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=337, Invalid=2213, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 00:39:01,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-24 00:39:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-10-24 00:39:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-24 00:39:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2020-10-24 00:39:01,749 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 105 [2020-10-24 00:39:01,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:01,750 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2020-10-24 00:39:01,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-24 00:39:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2020-10-24 00:39:01,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-24 00:39:01,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:01,755 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2020-10-24 00:39:01,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 00:39:01,755 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:01,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1494124015, now seen corresponding path program 10 times [2020-10-24 00:39:01,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:01,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472501930] [2020-10-24 00:39:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:01,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:01,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:01,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:02,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:02,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-24 00:39:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:02,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-24 00:39:02,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472501930] [2020-10-24 00:39:02,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:39:02,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-24 00:39:02,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281488008] [2020-10-24 00:39:02,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-24 00:39:02,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:39:02,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-24 00:39:02,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-10-24 00:39:02,294 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 21 states. [2020-10-24 00:39:04,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:04,151 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-10-24 00:39:04,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 00:39:04,152 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 75 [2020-10-24 00:39:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:04,154 INFO L225 Difference]: With dead ends: 85 [2020-10-24 00:39:04,154 INFO L226 Difference]: Without dead ends: 78 [2020-10-24 00:39:04,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 00:39:04,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-24 00:39:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2020-10-24 00:39:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-24 00:39:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2020-10-24 00:39:04,172 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 75 [2020-10-24 00:39:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:04,173 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2020-10-24 00:39:04,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-24 00:39:04,173 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2020-10-24 00:39:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-24 00:39:04,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:04,175 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-10-24 00:39:04,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 00:39:04,175 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:04,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:04,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1209072124, now seen corresponding path program 11 times [2020-10-24 00:39:04,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:04,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597179820] [2020-10-24 00:39:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:04,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:04,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:04,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:04,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-24 00:39:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:04,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:04,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:04,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:04,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:04,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 27 proven. 120 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-24 00:39:05,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597179820] [2020-10-24 00:39:05,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:39:05,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-24 00:39:05,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275508567] [2020-10-24 00:39:05,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-24 00:39:05,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:39:05,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-24 00:39:05,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-10-24 00:39:05,049 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand 27 states. [2020-10-24 00:39:08,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:08,169 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-10-24 00:39:08,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 00:39:08,169 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2020-10-24 00:39:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:08,171 INFO L225 Difference]: With dead ends: 90 [2020-10-24 00:39:08,171 INFO L226 Difference]: Without dead ends: 83 [2020-10-24 00:39:08,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=375, Invalid=2487, Unknown=0, NotChecked=0, Total=2862 [2020-10-24 00:39:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-24 00:39:08,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-10-24 00:39:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-24 00:39:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2020-10-24 00:39:08,190 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 105 [2020-10-24 00:39:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:08,190 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2020-10-24 00:39:08,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-24 00:39:08,190 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2020-10-24 00:39:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-24 00:39:08,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:08,192 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-10-24 00:39:08,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 00:39:08,192 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:08,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:08,193 INFO L82 PathProgramCache]: Analyzing trace with hash -793968977, now seen corresponding path program 12 times [2020-10-24 00:39:08,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:08,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893609301] [2020-10-24 00:39:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:08,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:08,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:08,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:08,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:08,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-24 00:39:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:08,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:08,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:08,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:08,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:09,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 29 proven. 168 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-10-24 00:39:09,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893609301] [2020-10-24 00:39:09,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:39:09,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-24 00:39:09,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78071284] [2020-10-24 00:39:09,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-24 00:39:09,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:39:09,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-24 00:39:09,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-10-24 00:39:09,215 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 29 states. [2020-10-24 00:39:10,132 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:39:10,643 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-24 00:39:12,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:12,711 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-24 00:39:12,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 00:39:12,711 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-10-24 00:39:12,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:12,713 INFO L225 Difference]: With dead ends: 90 [2020-10-24 00:39:12,713 INFO L226 Difference]: Without dead ends: 83 [2020-10-24 00:39:12,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=384, Invalid=2696, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 00:39:12,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-24 00:39:12,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2020-10-24 00:39:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-24 00:39:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-10-24 00:39:12,730 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 115 [2020-10-24 00:39:12,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:12,731 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-10-24 00:39:12,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-24 00:39:12,731 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-10-24 00:39:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-24 00:39:12,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:12,732 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-10-24 00:39:12,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 00:39:12,733 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:12,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1149586151, now seen corresponding path program 13 times [2020-10-24 00:39:12,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:12,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952226869] [2020-10-24 00:39:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:12,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:12,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:12,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:12,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:13,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:13,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-24 00:39:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:13,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:13,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-10-24 00:39:13,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952226869] [2020-10-24 00:39:13,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:39:13,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 00:39:13,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416971780] [2020-10-24 00:39:13,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 00:39:13,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:39:13,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 00:39:13,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-24 00:39:13,469 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 25 states. [2020-10-24 00:39:14,336 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:39:14,805 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-24 00:39:16,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:16,085 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2020-10-24 00:39:16,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 00:39:16,088 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-10-24 00:39:16,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:16,089 INFO L225 Difference]: With dead ends: 90 [2020-10-24 00:39:16,089 INFO L226 Difference]: Without dead ends: 83 [2020-10-24 00:39:16,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 00:39:16,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-24 00:39:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-10-24 00:39:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-24 00:39:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-10-24 00:39:16,109 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 95 [2020-10-24 00:39:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:16,110 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-10-24 00:39:16,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 00:39:16,110 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-10-24 00:39:16,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-24 00:39:16,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:16,111 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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] [2020-10-24 00:39:16,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 00:39:16,112 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:16,112 INFO L82 PathProgramCache]: Analyzing trace with hash 144287204, now seen corresponding path program 14 times [2020-10-24 00:39:16,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:16,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964701942] [2020-10-24 00:39:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:16,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:16,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:16,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:16,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:16,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:16,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-24 00:39:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:16,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 71 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-24 00:39:16,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964701942] [2020-10-24 00:39:16,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:39:16,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-24 00:39:16,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137819946] [2020-10-24 00:39:16,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-24 00:39:16,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:39:16,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-24 00:39:16,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-10-24 00:39:16,745 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 23 states. [2020-10-24 00:39:18,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:18,975 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-10-24 00:39:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 00:39:18,976 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-10-24 00:39:18,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:18,978 INFO L225 Difference]: With dead ends: 90 [2020-10-24 00:39:18,978 INFO L226 Difference]: Without dead ends: 83 [2020-10-24 00:39:18,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 00:39:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-24 00:39:18,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-10-24 00:39:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-24 00:39:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2020-10-24 00:39:18,996 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 85 [2020-10-24 00:39:18,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:18,996 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2020-10-24 00:39:18,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-24 00:39:18,997 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2020-10-24 00:39:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-24 00:39:18,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:18,998 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-10-24 00:39:18,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 00:39:18,998 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:18,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:18,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1889819076, now seen corresponding path program 15 times [2020-10-24 00:39:18,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:18,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835497904] [2020-10-24 00:39:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:19,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:19,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:19,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:19,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:19,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:19,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-24 00:39:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:19,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:19,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:19,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-24 00:39:19,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835497904] [2020-10-24 00:39:19,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:39:19,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-24 00:39:19,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600835827] [2020-10-24 00:39:19,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 00:39:19,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:39:19,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 00:39:19,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-10-24 00:39:19,564 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand 20 states. [2020-10-24 00:39:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:21,497 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-10-24 00:39:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 00:39:21,498 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2020-10-24 00:39:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:21,499 INFO L225 Difference]: With dead ends: 90 [2020-10-24 00:39:21,499 INFO L226 Difference]: Without dead ends: 83 [2020-10-24 00:39:21,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 00:39:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-24 00:39:21,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-10-24 00:39:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-24 00:39:21,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-10-24 00:39:21,526 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 105 [2020-10-24 00:39:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:21,526 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-10-24 00:39:21,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 00:39:21,526 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-10-24 00:39:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-24 00:39:21,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:21,528 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-10-24 00:39:21,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 00:39:21,528 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:21,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:21,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1252782777, now seen corresponding path program 16 times [2020-10-24 00:39:21,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:21,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353976254] [2020-10-24 00:39:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:21,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:21,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:21,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:21,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:21,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:22,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-24 00:39:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:22,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:22,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:22,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:22,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 28 proven. 169 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-10-24 00:39:22,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353976254] [2020-10-24 00:39:22,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:39:22,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-24 00:39:22,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081844775] [2020-10-24 00:39:22,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-24 00:39:22,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:39:22,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-24 00:39:22,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-10-24 00:39:22,512 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 29 states. [2020-10-24 00:39:24,058 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:39:24,622 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:39:25,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:25,978 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-10-24 00:39:25,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-24 00:39:25,978 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-10-24 00:39:25,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:25,979 INFO L225 Difference]: With dead ends: 90 [2020-10-24 00:39:25,979 INFO L226 Difference]: Without dead ends: 83 [2020-10-24 00:39:25,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2020-10-24 00:39:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-24 00:39:25,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-10-24 00:39:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-24 00:39:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2020-10-24 00:39:26,001 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 115 [2020-10-24 00:39:26,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:26,001 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2020-10-24 00:39:26,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-24 00:39:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2020-10-24 00:39:26,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-24 00:39:26,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:26,003 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-10-24 00:39:26,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 00:39:26,003 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:26,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:26,004 INFO L82 PathProgramCache]: Analyzing trace with hash -743029340, now seen corresponding path program 17 times [2020-10-24 00:39:26,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:26,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769914487] [2020-10-24 00:39:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:26,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:26,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:26,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:26,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:26,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:26,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-24 00:39:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:26,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:26,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:26,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:26,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:27,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 33 proven. 213 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-10-24 00:39:27,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769914487] [2020-10-24 00:39:27,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:39:27,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-24 00:39:27,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704058661] [2020-10-24 00:39:27,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-24 00:39:27,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:39:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-24 00:39:27,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-10-24 00:39:27,204 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 31 states. [2020-10-24 00:39:28,730 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:39:29,300 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:39:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:30,964 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-24 00:39:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 00:39:30,966 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-10-24 00:39:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:30,968 INFO L225 Difference]: With dead ends: 90 [2020-10-24 00:39:30,968 INFO L226 Difference]: Without dead ends: 83 [2020-10-24 00:39:30,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=393, Invalid=2913, Unknown=0, NotChecked=0, Total=3306 [2020-10-24 00:39:30,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-24 00:39:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2020-10-24 00:39:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-24 00:39:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-10-24 00:39:30,989 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 125 [2020-10-24 00:39:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:30,990 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-10-24 00:39:30,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-24 00:39:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-10-24 00:39:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-24 00:39:30,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:30,991 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-10-24 00:39:30,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 00:39:30,991 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:30,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:30,992 INFO L82 PathProgramCache]: Analyzing trace with hash -106233671, now seen corresponding path program 18 times [2020-10-24 00:39:30,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:30,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416517084] [2020-10-24 00:39:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:31,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:31,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:31,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:31,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-24 00:39:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:31,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:31,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:31,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:31,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:31,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:31,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 32 proven. 157 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-24 00:39:32,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416517084] [2020-10-24 00:39:32,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:39:32,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-24 00:39:32,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068892714] [2020-10-24 00:39:32,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-24 00:39:32,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:39:32,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-24 00:39:32,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-10-24 00:39:32,103 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 29 states. [2020-10-24 00:39:33,044 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-24 00:39:35,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:35,819 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-10-24 00:39:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 00:39:35,820 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-10-24 00:39:35,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:35,821 INFO L225 Difference]: With dead ends: 95 [2020-10-24 00:39:35,822 INFO L226 Difference]: Without dead ends: 88 [2020-10-24 00:39:35,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=422, Invalid=3000, Unknown=0, NotChecked=0, Total=3422 [2020-10-24 00:39:35,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-24 00:39:35,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-10-24 00:39:35,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-24 00:39:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-10-24 00:39:35,851 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 115 [2020-10-24 00:39:35,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:35,852 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-10-24 00:39:35,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-24 00:39:35,852 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-10-24 00:39:35,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-24 00:39:35,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:35,853 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-10-24 00:39:35,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-24 00:39:35,854 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:35,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:35,855 INFO L82 PathProgramCache]: Analyzing trace with hash 202792868, now seen corresponding path program 19 times [2020-10-24 00:39:35,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:35,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748549418] [2020-10-24 00:39:35,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:36,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:36,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:36,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:36,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:36,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-24 00:39:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:36,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:36,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:36,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:36,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:36,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:36,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 34 proven. 212 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-10-24 00:39:37,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748549418] [2020-10-24 00:39:37,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:39:37,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-24 00:39:37,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027102018] [2020-10-24 00:39:37,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-24 00:39:37,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:39:37,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-24 00:39:37,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-10-24 00:39:37,055 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 31 states. [2020-10-24 00:39:38,142 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:39:38,697 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-24 00:39:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:41,450 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2020-10-24 00:39:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 00:39:41,455 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-10-24 00:39:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:41,456 INFO L225 Difference]: With dead ends: 99 [2020-10-24 00:39:41,456 INFO L226 Difference]: Without dead ends: 92 [2020-10-24 00:39:41,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=431, Invalid=3229, Unknown=0, NotChecked=0, Total=3660 [2020-10-24 00:39:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-24 00:39:41,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2020-10-24 00:39:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-24 00:39:41,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-10-24 00:39:41,482 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 125 [2020-10-24 00:39:41,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:41,482 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-10-24 00:39:41,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-24 00:39:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-10-24 00:39:41,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-24 00:39:41,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:41,483 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-10-24 00:39:41,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-24 00:39:41,484 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:41,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1616955303, now seen corresponding path program 20 times [2020-10-24 00:39:41,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:41,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027315008] [2020-10-24 00:39:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:41,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:41,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:41,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:41,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:41,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:41,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-24 00:39:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:42,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:42,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:42,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:42,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:42,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:42,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 38 proven. 262 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-24 00:39:42,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027315008] [2020-10-24 00:39:42,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:39:42,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-24 00:39:42,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897130585] [2020-10-24 00:39:42,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-24 00:39:42,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:39:42,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-24 00:39:42,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 00:39:42,870 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 33 states. [2020-10-24 00:39:44,046 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:39:44,672 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-24 00:39:45,287 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:39:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:47,666 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2020-10-24 00:39:47,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 00:39:47,668 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-10-24 00:39:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:47,670 INFO L225 Difference]: With dead ends: 95 [2020-10-24 00:39:47,670 INFO L226 Difference]: Without dead ends: 88 [2020-10-24 00:39:47,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2020-10-24 00:39:47,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-24 00:39:47,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2020-10-24 00:39:47,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-24 00:39:47,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2020-10-24 00:39:47,695 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 135 [2020-10-24 00:39:47,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:47,695 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2020-10-24 00:39:47,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-24 00:39:47,695 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2020-10-24 00:39:47,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-24 00:39:47,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:47,697 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-10-24 00:39:47,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-24 00:39:47,697 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:47,697 INFO L82 PathProgramCache]: Analyzing trace with hash 355439567, now seen corresponding path program 21 times [2020-10-24 00:39:47,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:47,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039486126] [2020-10-24 00:39:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:47,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:47,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:47,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:47,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:48,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:48,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:48,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-24 00:39:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:48,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 9 proven. 101 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-24 00:39:48,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039486126] [2020-10-24 00:39:48,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:39:48,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 00:39:48,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553526818] [2020-10-24 00:39:48,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 00:39:48,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:39:48,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 00:39:48,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-24 00:39:48,468 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 25 states. [2020-10-24 00:39:49,375 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-24 00:39:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:51,415 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2020-10-24 00:39:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-24 00:39:51,417 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-10-24 00:39:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:51,418 INFO L225 Difference]: With dead ends: 95 [2020-10-24 00:39:51,418 INFO L226 Difference]: Without dead ends: 88 [2020-10-24 00:39:51,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=328, Invalid=2024, Unknown=0, NotChecked=0, Total=2352 [2020-10-24 00:39:51,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-24 00:39:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-10-24 00:39:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-24 00:39:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2020-10-24 00:39:51,448 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 95 [2020-10-24 00:39:51,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:51,449 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2020-10-24 00:39:51,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 00:39:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2020-10-24 00:39:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-24 00:39:51,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:51,450 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-10-24 00:39:51,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-24 00:39:51,451 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:51,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:51,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1751846044, now seen corresponding path program 22 times [2020-10-24 00:39:51,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:51,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786836226] [2020-10-24 00:39:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:51,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:51,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:51,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:51,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:51,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:52,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:52,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-24 00:39:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:52,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:52,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:52,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:52,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 30 proven. 194 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-24 00:39:52,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786836226] [2020-10-24 00:39:52,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:39:52,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 00:39:52,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71017891] [2020-10-24 00:39:52,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 00:39:52,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:39:52,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 00:39:52,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-10-24 00:39:52,259 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand 22 states. [2020-10-24 00:39:54,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:54,755 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2020-10-24 00:39:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-24 00:39:54,756 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 125 [2020-10-24 00:39:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:54,758 INFO L225 Difference]: With dead ends: 95 [2020-10-24 00:39:54,758 INFO L226 Difference]: Without dead ends: 88 [2020-10-24 00:39:54,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=314, Invalid=1756, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 00:39:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-24 00:39:54,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-10-24 00:39:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-24 00:39:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2020-10-24 00:39:54,785 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 125 [2020-10-24 00:39:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:54,785 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2020-10-24 00:39:54,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 00:39:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2020-10-24 00:39:54,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-24 00:39:54,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:54,787 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-10-24 00:39:54,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-24 00:39:54,787 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:54,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:54,788 INFO L82 PathProgramCache]: Analyzing trace with hash 960264516, now seen corresponding path program 23 times [2020-10-24 00:39:54,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:54,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812394328] [2020-10-24 00:39:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:54,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:54,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:55,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:55,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:55,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:55,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:55,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-24 00:39:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:55,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:55,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 20 proven. 133 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-24 00:39:55,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812394328] [2020-10-24 00:39:55,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:39:55,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-24 00:39:55,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935216983] [2020-10-24 00:39:55,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-24 00:39:55,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:39:55,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-24 00:39:55,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-10-24 00:39:55,774 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand 27 states. [2020-10-24 00:39:56,753 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:39:57,272 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-24 00:39:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:39:58,992 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2020-10-24 00:39:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-24 00:39:58,992 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2020-10-24 00:39:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:39:58,994 INFO L225 Difference]: With dead ends: 95 [2020-10-24 00:39:58,994 INFO L226 Difference]: Without dead ends: 88 [2020-10-24 00:39:58,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=337, Invalid=2213, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 00:39:58,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-24 00:39:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-10-24 00:39:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-24 00:39:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2020-10-24 00:39:59,016 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 105 [2020-10-24 00:39:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:39:59,016 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2020-10-24 00:39:59,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-24 00:39:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2020-10-24 00:39:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-24 00:39:59,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:39:59,018 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-10-24 00:39:59,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-24 00:39:59,018 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:39:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:39:59,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1939135441, now seen corresponding path program 24 times [2020-10-24 00:39:59,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:39:59,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849803169] [2020-10-24 00:39:59,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:39:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:59,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:39:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:59,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:39:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:59,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:59,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:59,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:59,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:59,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-24 00:39:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:59,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:59,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:39:59,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:39:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 25 proven. 172 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-10-24 00:40:00,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849803169] [2020-10-24 00:40:00,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:40:00,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-24 00:40:00,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836316479] [2020-10-24 00:40:00,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-24 00:40:00,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:40:00,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-24 00:40:00,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-10-24 00:40:00,088 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand 29 states. [2020-10-24 00:40:01,105 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:40:01,665 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:40:02,221 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:40:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:40:03,516 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2020-10-24 00:40:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-24 00:40:03,516 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-10-24 00:40:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:40:03,518 INFO L225 Difference]: With dead ends: 95 [2020-10-24 00:40:03,518 INFO L226 Difference]: Without dead ends: 88 [2020-10-24 00:40:03,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2020-10-24 00:40:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-24 00:40:03,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-10-24 00:40:03,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-24 00:40:03,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-10-24 00:40:03,544 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 115 [2020-10-24 00:40:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:40:03,545 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-10-24 00:40:03,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-24 00:40:03,545 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-10-24 00:40:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-24 00:40:03,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:40:03,546 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-10-24 00:40:03,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-24 00:40:03,547 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:40:03,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:40:03,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1176677519, now seen corresponding path program 25 times [2020-10-24 00:40:03,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:40:03,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119534327] [2020-10-24 00:40:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:40:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:03,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:40:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:03,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:40:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:03,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:03,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:03,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:04,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:04,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-24 00:40:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:04,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:04,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:04,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:04,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:04,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 37 proven. 263 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-24 00:40:04,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119534327] [2020-10-24 00:40:04,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:40:04,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-24 00:40:04,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035240321] [2020-10-24 00:40:04,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-24 00:40:04,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:40:04,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-24 00:40:04,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 00:40:04,941 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 33 states. [2020-10-24 00:40:06,053 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:40:06,624 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:40:07,246 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:40:07,827 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:40:09,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:40:09,264 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-10-24 00:40:09,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 00:40:09,266 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-10-24 00:40:09,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:40:09,267 INFO L225 Difference]: With dead ends: 95 [2020-10-24 00:40:09,268 INFO L226 Difference]: Without dead ends: 88 [2020-10-24 00:40:09,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=402, Invalid=3138, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 00:40:09,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-24 00:40:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-10-24 00:40:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-24 00:40:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-10-24 00:40:09,294 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 135 [2020-10-24 00:40:09,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:40:09,294 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-10-24 00:40:09,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-24 00:40:09,295 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-10-24 00:40:09,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-24 00:40:09,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:40:09,296 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-10-24 00:40:09,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-24 00:40:09,296 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:40:09,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:40:09,297 INFO L82 PathProgramCache]: Analyzing trace with hash -936102524, now seen corresponding path program 26 times [2020-10-24 00:40:09,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:40:09,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621973779] [2020-10-24 00:40:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:40:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:09,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:40:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:09,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:40:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:09,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:09,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:09,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:09,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:09,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-24 00:40:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:10,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:10,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:10,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:10,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:10,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:10,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 42 proven. 317 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-10-24 00:40:10,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621973779] [2020-10-24 00:40:10,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:40:10,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-24 00:40:10,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159503696] [2020-10-24 00:40:10,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-24 00:40:10,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:40:10,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-24 00:40:10,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 00:40:10,957 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 35 states. [2020-10-24 00:40:12,182 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:40:12,630 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:40:12,897 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:40:13,553 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:40:14,167 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:40:14,337 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:40:16,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:40:16,274 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2020-10-24 00:40:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 00:40:16,274 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-10-24 00:40:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:40:16,275 INFO L225 Difference]: With dead ends: 95 [2020-10-24 00:40:16,275 INFO L226 Difference]: Without dead ends: 88 [2020-10-24 00:40:16,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=449, Invalid=3711, Unknown=0, NotChecked=0, Total=4160 [2020-10-24 00:40:16,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-24 00:40:16,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2020-10-24 00:40:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-24 00:40:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2020-10-24 00:40:16,300 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 145 [2020-10-24 00:40:16,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:40:16,300 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2020-10-24 00:40:16,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-24 00:40:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2020-10-24 00:40:16,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-24 00:40:16,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:40:16,302 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-10-24 00:40:16,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-24 00:40:16,302 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:40:16,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:40:16,302 INFO L82 PathProgramCache]: Analyzing trace with hash -319407644, now seen corresponding path program 27 times [2020-10-24 00:40:16,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:40:16,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061960720] [2020-10-24 00:40:16,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:40:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:16,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:40:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:16,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:40:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:16,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:16,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-24 00:40:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:16,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:16,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:16,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:16,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:17,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:17,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:17,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 37 proven. 199 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-24 00:40:17,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061960720] [2020-10-24 00:40:17,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:40:17,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-24 00:40:17,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377985616] [2020-10-24 00:40:17,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-24 00:40:17,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:40:17,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-24 00:40:17,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-10-24 00:40:17,592 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 31 states. [2020-10-24 00:40:18,680 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-24 00:40:22,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:40:22,161 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2020-10-24 00:40:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 00:40:22,162 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-10-24 00:40:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:40:22,164 INFO L225 Difference]: With dead ends: 100 [2020-10-24 00:40:22,164 INFO L226 Difference]: Without dead ends: 93 [2020-10-24 00:40:22,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=469, Invalid=3563, Unknown=0, NotChecked=0, Total=4032 [2020-10-24 00:40:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-24 00:40:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-10-24 00:40:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-24 00:40:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-10-24 00:40:22,196 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 125 [2020-10-24 00:40:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:40:22,197 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-10-24 00:40:22,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-24 00:40:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-10-24 00:40:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-24 00:40:22,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:40:22,199 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-10-24 00:40:22,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-24 00:40:22,199 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:40:22,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:40:22,199 INFO L82 PathProgramCache]: Analyzing trace with hash -583782641, now seen corresponding path program 28 times [2020-10-24 00:40:22,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:40:22,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138690753] [2020-10-24 00:40:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:40:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:22,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:40:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:22,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:40:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:22,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:22,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:22,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-24 00:40:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:22,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:22,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:22,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:23,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:23,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:23,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:23,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 39 proven. 261 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-24 00:40:23,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138690753] [2020-10-24 00:40:23,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:40:23,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-24 00:40:23,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095347613] [2020-10-24 00:40:23,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-24 00:40:23,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:40:23,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-24 00:40:23,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 00:40:23,576 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 33 states. [2020-10-24 00:40:24,819 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:40:24,985 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:40:25,467 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-24 00:40:28,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:40:28,819 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-10-24 00:40:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 00:40:28,821 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-10-24 00:40:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:40:28,823 INFO L225 Difference]: With dead ends: 104 [2020-10-24 00:40:28,823 INFO L226 Difference]: Without dead ends: 97 [2020-10-24 00:40:28,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=478, Invalid=3812, Unknown=0, NotChecked=0, Total=4290 [2020-10-24 00:40:28,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-24 00:40:28,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2020-10-24 00:40:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-24 00:40:28,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-10-24 00:40:28,859 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 135 [2020-10-24 00:40:28,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:40:28,859 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-10-24 00:40:28,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-24 00:40:28,860 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-10-24 00:40:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-24 00:40:28,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:40:28,861 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-10-24 00:40:28,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-24 00:40:28,861 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:40:28,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:40:28,862 INFO L82 PathProgramCache]: Analyzing trace with hash -482252412, now seen corresponding path program 29 times [2020-10-24 00:40:28,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:40:28,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653343063] [2020-10-24 00:40:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:40:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:29,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:40:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:29,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:40:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:29,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:29,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:29,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:29,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-24 00:40:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:29,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:29,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:29,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:29,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:30,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:30,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:30,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 43 proven. 316 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-10-24 00:40:30,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653343063] [2020-10-24 00:40:30,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:40:30,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-24 00:40:30,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488503258] [2020-10-24 00:40:30,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-24 00:40:30,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:40:30,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-24 00:40:30,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 00:40:30,540 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 35 states. [2020-10-24 00:40:31,840 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:40:32,017 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:40:32,260 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:40:32,521 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:40:32,714 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:40:33,175 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:40:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:40:36,430 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-10-24 00:40:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 00:40:36,431 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-10-24 00:40:36,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:40:36,433 INFO L225 Difference]: With dead ends: 104 [2020-10-24 00:40:36,433 INFO L226 Difference]: Without dead ends: 97 [2020-10-24 00:40:36,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=487, Invalid=4069, Unknown=0, NotChecked=0, Total=4556 [2020-10-24 00:40:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-24 00:40:36,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2020-10-24 00:40:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-24 00:40:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-10-24 00:40:36,462 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 145 [2020-10-24 00:40:36,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:40:36,462 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-10-24 00:40:36,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-24 00:40:36,462 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-10-24 00:40:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-24 00:40:36,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:40:36,464 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-10-24 00:40:36,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-24 00:40:36,464 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:40:36,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:40:36,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1776823535, now seen corresponding path program 30 times [2020-10-24 00:40:36,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:40:36,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265646335] [2020-10-24 00:40:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:40:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:36,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:40:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:36,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:40:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:36,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:36,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:36,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:37,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:37,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-24 00:40:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:37,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:37,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:37,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:37,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:37,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:37,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:38,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 47 proven. 376 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-10-24 00:40:38,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265646335] [2020-10-24 00:40:38,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:40:38,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-24 00:40:38,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963225623] [2020-10-24 00:40:38,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-24 00:40:38,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:40:38,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-24 00:40:38,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 00:40:38,294 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 37 states. [2020-10-24 00:40:39,399 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:40:39,621 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:40:40,056 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:40:40,316 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:40:40,524 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:40:41,028 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:40:41,456 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:40:41,695 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:40:41,875 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:40:44,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:40:44,377 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2020-10-24 00:40:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 00:40:44,378 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-10-24 00:40:44,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:40:44,379 INFO L225 Difference]: With dead ends: 100 [2020-10-24 00:40:44,379 INFO L226 Difference]: Without dead ends: 93 [2020-10-24 00:40:44,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=496, Invalid=4334, Unknown=0, NotChecked=0, Total=4830 [2020-10-24 00:40:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-24 00:40:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-10-24 00:40:44,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-24 00:40:44,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2020-10-24 00:40:44,412 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 155 [2020-10-24 00:40:44,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:40:44,412 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2020-10-24 00:40:44,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-24 00:40:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2020-10-24 00:40:44,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-24 00:40:44,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:40:44,413 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-10-24 00:40:44,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-24 00:40:44,414 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:40:44,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:40:44,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1518465660, now seen corresponding path program 31 times [2020-10-24 00:40:44,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:40:44,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378728215] [2020-10-24 00:40:44,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:40:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:44,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:40:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:44,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:40:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:44,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:44,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:44,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:44,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:45,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:45,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-24 00:40:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:45,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 11 proven. 136 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-24 00:40:45,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378728215] [2020-10-24 00:40:45,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:40:45,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-24 00:40:45,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555361476] [2020-10-24 00:40:45,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-24 00:40:45,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:40:45,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-24 00:40:45,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-10-24 00:40:45,597 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 27 states. [2020-10-24 00:40:46,690 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-24 00:40:46,847 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-24 00:40:49,119 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-24 00:40:49,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:40:49,323 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2020-10-24 00:40:49,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 00:40:49,325 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2020-10-24 00:40:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:40:49,326 INFO L225 Difference]: With dead ends: 100 [2020-10-24 00:40:49,326 INFO L226 Difference]: Without dead ends: 93 [2020-10-24 00:40:49,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=375, Invalid=2487, Unknown=0, NotChecked=0, Total=2862 [2020-10-24 00:40:49,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-24 00:40:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-10-24 00:40:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-24 00:40:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2020-10-24 00:40:49,354 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 105 [2020-10-24 00:40:49,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:40:49,354 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2020-10-24 00:40:49,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-24 00:40:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2020-10-24 00:40:49,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-24 00:40:49,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:40:49,356 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-10-24 00:40:49,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-24 00:40:49,356 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:40:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:40:49,356 INFO L82 PathProgramCache]: Analyzing trace with hash 501789028, now seen corresponding path program 32 times [2020-10-24 00:40:49,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:40:49,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477346157] [2020-10-24 00:40:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:40:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:49,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:40:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:49,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:40:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:49,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:49,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:49,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:49,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:50,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:50,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-24 00:40:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:50,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:50,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:50,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 29 proven. 217 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-10-24 00:40:50,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477346157] [2020-10-24 00:40:50,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:40:50,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-24 00:40:50,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874982833] [2020-10-24 00:40:50,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-24 00:40:50,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:40:50,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-24 00:40:50,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-10-24 00:40:50,748 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand 31 states. [2020-10-24 00:40:51,876 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:40:52,042 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:40:52,479 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:40:53,098 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:40:53,262 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:40:55,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:40:55,117 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2020-10-24 00:40:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 00:40:55,119 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-10-24 00:40:55,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:40:55,120 INFO L225 Difference]: With dead ends: 100 [2020-10-24 00:40:55,120 INFO L226 Difference]: Without dead ends: 93 [2020-10-24 00:40:55,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=393, Invalid=2913, Unknown=0, NotChecked=0, Total=3306 [2020-10-24 00:40:55,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-24 00:40:55,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-10-24 00:40:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-24 00:40:55,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 111 transitions. [2020-10-24 00:40:55,150 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 111 transitions. Word has length 125 [2020-10-24 00:40:55,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:40:55,151 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 111 transitions. [2020-10-24 00:40:55,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-24 00:40:55,151 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 111 transitions. [2020-10-24 00:40:55,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-24 00:40:55,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:40:55,152 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-10-24 00:40:55,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-24 00:40:55,152 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:40:55,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:40:55,152 INFO L82 PathProgramCache]: Analyzing trace with hash -90226087, now seen corresponding path program 33 times [2020-10-24 00:40:55,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:40:55,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370750766] [2020-10-24 00:40:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:40:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:55,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:40:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:55,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:40:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:55,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:55,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:55,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:55,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:55,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:55,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-24 00:40:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:56,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:56,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:56,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:56,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:40:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:40:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 34 proven. 266 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-24 00:40:56,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370750766] [2020-10-24 00:40:56,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:40:56,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-24 00:40:56,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006261873] [2020-10-24 00:40:56,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-24 00:40:56,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:40:56,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-24 00:40:56,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 00:40:56,600 INFO L87 Difference]: Start difference. First operand 88 states and 111 transitions. Second operand 33 states. [2020-10-24 00:40:57,779 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:40:58,376 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:40:58,790 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:40:59,016 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:40:59,184 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:40:59,390 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:40:59,617 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:40:59,784 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:41:01,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:41:01,188 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2020-10-24 00:41:01,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 00:41:01,189 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-10-24 00:41:01,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:41:01,191 INFO L225 Difference]: With dead ends: 100 [2020-10-24 00:41:01,191 INFO L226 Difference]: Without dead ends: 93 [2020-10-24 00:41:01,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=402, Invalid=3138, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 00:41:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-24 00:41:01,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-10-24 00:41:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-24 00:41:01,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2020-10-24 00:41:01,219 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 135 [2020-10-24 00:41:01,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:41:01,219 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2020-10-24 00:41:01,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-24 00:41:01,219 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2020-10-24 00:41:01,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-24 00:41:01,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:41:01,221 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-10-24 00:41:01,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-24 00:41:01,221 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:41:01,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:41:01,221 INFO L82 PathProgramCache]: Analyzing trace with hash -345081863, now seen corresponding path program 34 times [2020-10-24 00:41:01,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:41:01,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670892062] [2020-10-24 00:41:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:41:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:01,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:41:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:01,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:41:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:01,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:01,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:01,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:01,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:01,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:02,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-24 00:41:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:02,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:02,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:02,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:02,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:02,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:02,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 46 proven. 377 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-10-24 00:41:03,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670892062] [2020-10-24 00:41:03,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:41:03,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-24 00:41:03,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755930972] [2020-10-24 00:41:03,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-24 00:41:03,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:41:03,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-24 00:41:03,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 00:41:03,024 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand 37 states. [2020-10-24 00:41:04,399 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:41:05,083 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:41:05,295 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:41:05,813 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:41:05,994 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:41:06,222 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:41:06,488 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:41:06,664 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:41:06,885 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:41:07,146 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:41:07,334 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:41:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:41:09,142 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2020-10-24 00:41:09,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 00:41:09,144 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-10-24 00:41:09,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:41:09,145 INFO L225 Difference]: With dead ends: 100 [2020-10-24 00:41:09,145 INFO L226 Difference]: Without dead ends: 93 [2020-10-24 00:41:09,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=458, Invalid=3964, Unknown=0, NotChecked=0, Total=4422 [2020-10-24 00:41:09,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-24 00:41:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-10-24 00:41:09,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-24 00:41:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-10-24 00:41:09,176 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 155 [2020-10-24 00:41:09,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:41:09,176 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-10-24 00:41:09,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-24 00:41:09,176 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-10-24 00:41:09,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-24 00:41:09,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:41:09,177 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-10-24 00:41:09,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-24 00:41:09,178 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:41:09,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:41:09,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1640360775, now seen corresponding path program 35 times [2020-10-24 00:41:09,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:41:09,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301324597] [2020-10-24 00:41:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:41:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:09,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:41:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:09,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:41:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:09,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:09,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:09,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:09,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:09,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:10,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-24 00:41:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:10,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:10,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 24 proven. 173 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-10-24 00:41:10,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301324597] [2020-10-24 00:41:10,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:41:10,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-24 00:41:10,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945326250] [2020-10-24 00:41:10,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-24 00:41:10,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:41:10,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-24 00:41:10,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-10-24 00:41:10,398 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 29 states. [2020-10-24 00:41:11,567 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:41:11,740 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:41:11,972 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:41:12,205 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-24 00:41:12,385 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:41:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:41:14,603 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-10-24 00:41:14,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 00:41:14,604 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-10-24 00:41:14,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:41:14,605 INFO L225 Difference]: With dead ends: 100 [2020-10-24 00:41:14,605 INFO L226 Difference]: Without dead ends: 93 [2020-10-24 00:41:14,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=384, Invalid=2696, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 00:41:14,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-24 00:41:14,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-10-24 00:41:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-24 00:41:14,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2020-10-24 00:41:14,634 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 115 [2020-10-24 00:41:14,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:41:14,635 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2020-10-24 00:41:14,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-24 00:41:14,635 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2020-10-24 00:41:14,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-24 00:41:14,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:41:14,636 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-10-24 00:41:14,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-24 00:41:14,636 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:41:14,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:41:14,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1329439012, now seen corresponding path program 36 times [2020-10-24 00:41:14,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:41:14,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650943660] [2020-10-24 00:41:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:41:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:14,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:41:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:14,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:41:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:14,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:14,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:15,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:15,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:15,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:15,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-24 00:41:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:15,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:15,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:15,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:16,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:16,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:16,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:16,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 51 proven. 441 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-10-24 00:41:16,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650943660] [2020-10-24 00:41:16,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:41:16,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-24 00:41:16,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775485923] [2020-10-24 00:41:16,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-24 00:41:16,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:41:16,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-24 00:41:16,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 00:41:16,813 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand 39 states. [2020-10-24 00:41:18,205 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:41:18,476 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-24 00:41:18,684 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:41:18,939 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:41:19,292 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:41:19,535 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:41:19,876 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:41:20,149 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:41:20,364 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:41:20,634 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:41:20,950 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:41:21,164 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:41:21,429 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:41:21,751 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:41:21,972 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:41:24,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:41:24,770 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2020-10-24 00:41:24,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 00:41:24,770 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-10-24 00:41:24,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:41:24,771 INFO L225 Difference]: With dead ends: 100 [2020-10-24 00:41:24,771 INFO L226 Difference]: Without dead ends: 93 [2020-10-24 00:41:24,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=505, Invalid=4607, Unknown=0, NotChecked=0, Total=5112 [2020-10-24 00:41:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-24 00:41:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-10-24 00:41:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-24 00:41:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-10-24 00:41:24,810 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 165 [2020-10-24 00:41:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:41:24,812 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-10-24 00:41:24,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-24 00:41:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-10-24 00:41:24,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-24 00:41:24,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:41:24,813 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-10-24 00:41:24,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-24 00:41:24,814 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:41:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:41:24,814 INFO L82 PathProgramCache]: Analyzing trace with hash 302157124, now seen corresponding path program 37 times [2020-10-24 00:41:24,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:41:24,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862585523] [2020-10-24 00:41:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:41:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:24,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:41:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:24,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:41:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:25,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:25,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:25,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:25,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:25,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:25,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-24 00:41:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:25,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:25,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:25,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:25,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:25,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 39 proven. 293 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-10-24 00:41:25,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862585523] [2020-10-24 00:41:25,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:41:25,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-24 00:41:25,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651283161] [2020-10-24 00:41:25,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-24 00:41:25,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:41:25,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-24 00:41:25,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-10-24 00:41:25,942 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 24 states. [2020-10-24 00:41:29,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:41:29,750 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2020-10-24 00:41:29,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 00:41:29,752 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 145 [2020-10-24 00:41:29,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:41:29,753 INFO L225 Difference]: With dead ends: 100 [2020-10-24 00:41:29,753 INFO L226 Difference]: Without dead ends: 93 [2020-10-24 00:41:29,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=361, Invalid=2189, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 00:41:29,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-24 00:41:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-10-24 00:41:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-24 00:41:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2020-10-24 00:41:29,782 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 145 [2020-10-24 00:41:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:41:29,782 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2020-10-24 00:41:29,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-24 00:41:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2020-10-24 00:41:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-24 00:41:29,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:41:29,783 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-10-24 00:41:29,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-24 00:41:29,784 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:41:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:41:29,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1103733159, now seen corresponding path program 38 times [2020-10-24 00:41:29,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:41:29,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484253725] [2020-10-24 00:41:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:41:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:29,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:41:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:29,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:41:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:30,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:30,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-24 00:41:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:30,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:30,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:30,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:30,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:30,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:30,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:30,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:31,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 42 proven. 246 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-24 00:41:31,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484253725] [2020-10-24 00:41:31,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:41:31,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-24 00:41:31,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272705158] [2020-10-24 00:41:31,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-24 00:41:31,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:41:31,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-24 00:41:31,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 00:41:31,448 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 33 states. [2020-10-24 00:41:32,596 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-24 00:41:32,854 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-24 00:41:37,712 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-24 00:41:37,870 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-24 00:41:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:41:37,905 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2020-10-24 00:41:37,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-24 00:41:37,907 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-10-24 00:41:37,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:41:37,909 INFO L225 Difference]: With dead ends: 105 [2020-10-24 00:41:37,909 INFO L226 Difference]: Without dead ends: 98 [2020-10-24 00:41:37,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=516, Invalid=4176, Unknown=0, NotChecked=0, Total=4692 [2020-10-24 00:41:37,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-24 00:41:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-10-24 00:41:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 00:41:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-10-24 00:41:37,945 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 135 [2020-10-24 00:41:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:41:37,945 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-10-24 00:41:37,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-24 00:41:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-10-24 00:41:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-24 00:41:37,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:41:37,947 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-10-24 00:41:37,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-24 00:41:37,947 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:41:37,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:41:37,948 INFO L82 PathProgramCache]: Analyzing trace with hash 665852356, now seen corresponding path program 39 times [2020-10-24 00:41:37,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:41:37,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395570529] [2020-10-24 00:41:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:41:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:38,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:41:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:38,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:41:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:38,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:38,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:38,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-24 00:41:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:38,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:38,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:39,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:39,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:39,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:39,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:39,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:39,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 44 proven. 315 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-10-24 00:41:40,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395570529] [2020-10-24 00:41:40,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:41:40,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-24 00:41:40,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399045880] [2020-10-24 00:41:40,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-24 00:41:40,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:41:40,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-24 00:41:40,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 00:41:40,044 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 35 states. [2020-10-24 00:41:41,362 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:41:41,645 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:41:41,846 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:41:42,095 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:41:42,396 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-24 00:41:42,607 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:41:47,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:41:47,704 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2020-10-24 00:41:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-24 00:41:47,706 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-10-24 00:41:47,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:41:47,708 INFO L225 Difference]: With dead ends: 109 [2020-10-24 00:41:47,708 INFO L226 Difference]: Without dead ends: 102 [2020-10-24 00:41:47,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=525, Invalid=4445, Unknown=0, NotChecked=0, Total=4970 [2020-10-24 00:41:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-24 00:41:47,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2020-10-24 00:41:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 00:41:47,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-10-24 00:41:47,752 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 145 [2020-10-24 00:41:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:41:47,753 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-10-24 00:41:47,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-24 00:41:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-10-24 00:41:47,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-24 00:41:47,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:41:47,755 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-10-24 00:41:47,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-24 00:41:47,755 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:41:47,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:41:47,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1635613191, now seen corresponding path program 40 times [2020-10-24 00:41:47,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:41:47,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888270271] [2020-10-24 00:41:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:41:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:47,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:41:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:47,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:41:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:48,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:48,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:48,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:48,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-24 00:41:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:48,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:48,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:49,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:49,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:49,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:49,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:49,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:49,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 48 proven. 375 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-10-24 00:41:50,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888270271] [2020-10-24 00:41:50,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:41:50,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-24 00:41:50,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760185082] [2020-10-24 00:41:50,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-24 00:41:50,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:41:50,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-24 00:41:50,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 00:41:50,127 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 37 states. [2020-10-24 00:41:51,420 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:41:51,676 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:41:51,887 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:41:52,187 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:41:52,500 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:41:52,752 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:41:53,077 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:41:53,350 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:41:53,561 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:41:57,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:41:57,595 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2020-10-24 00:41:57,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-24 00:41:57,597 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-10-24 00:41:57,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:41:57,599 INFO L225 Difference]: With dead ends: 109 [2020-10-24 00:41:57,599 INFO L226 Difference]: Without dead ends: 102 [2020-10-24 00:41:57,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=534, Invalid=4722, Unknown=0, NotChecked=0, Total=5256 [2020-10-24 00:41:57,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-24 00:41:57,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2020-10-24 00:41:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 00:41:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-10-24 00:41:57,653 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 155 [2020-10-24 00:41:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:41:57,656 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-10-24 00:41:57,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-24 00:41:57,656 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-10-24 00:41:57,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-24 00:41:57,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:41:57,658 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-10-24 00:41:57,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-24 00:41:57,658 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:41:57,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:41:57,659 INFO L82 PathProgramCache]: Analyzing trace with hash -43499612, now seen corresponding path program 41 times [2020-10-24 00:41:57,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:41:57,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816531468] [2020-10-24 00:41:57,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:41:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:57,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:41:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:57,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:41:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:57,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:58,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:58,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:58,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:58,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-24 00:41:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:58,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:58,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:59,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:59,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:59,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:59,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:41:59,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:41:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:00,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 52 proven. 440 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-10-24 00:42:00,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816531468] [2020-10-24 00:42:00,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:42:00,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-24 00:42:00,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024251996] [2020-10-24 00:42:00,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-24 00:42:00,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:42:00,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-24 00:42:00,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 00:42:00,281 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 39 states. [2020-10-24 00:42:01,875 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:42:02,186 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:42:02,419 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:42:02,722 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-24 00:42:03,113 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-24 00:42:03,398 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:42:03,784 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:04,147 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:42:04,392 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:04,683 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:05,048 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:42:05,290 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:42:09,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:42:09,960 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2020-10-24 00:42:09,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-24 00:42:09,960 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-10-24 00:42:09,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:42:09,963 INFO L225 Difference]: With dead ends: 109 [2020-10-24 00:42:09,963 INFO L226 Difference]: Without dead ends: 102 [2020-10-24 00:42:09,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=543, Invalid=5007, Unknown=0, NotChecked=0, Total=5550 [2020-10-24 00:42:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-24 00:42:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2020-10-24 00:42:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 00:42:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-10-24 00:42:09,994 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 165 [2020-10-24 00:42:09,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:42:09,994 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-10-24 00:42:09,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-24 00:42:09,994 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-10-24 00:42:09,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-24 00:42:09,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:42:09,996 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-10-24 00:42:09,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-24 00:42:09,996 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:42:09,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:42:09,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1893053849, now seen corresponding path program 42 times [2020-10-24 00:42:09,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:42:09,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137429036] [2020-10-24 00:42:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:42:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:10,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:42:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:10,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:42:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:10,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:10,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:10,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:10,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:10,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:11,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-24 00:42:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:11,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:11,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:11,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:11,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:12,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:12,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:12,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:12,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 56 proven. 510 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-10-24 00:42:12,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137429036] [2020-10-24 00:42:12,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:42:12,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-24 00:42:12,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154888469] [2020-10-24 00:42:12,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-24 00:42:12,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:42:12,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-24 00:42:12,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 00:42:12,964 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 41 states. [2020-10-24 00:42:14,668 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:42:14,986 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:42:15,224 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:42:15,571 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:42:15,956 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:42:16,244 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:16,630 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:16,943 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:42:17,182 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:17,560 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:17,884 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:42:18,137 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:18,516 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:18,831 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:42:19,084 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:42:22,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:42:22,924 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2020-10-24 00:42:22,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-24 00:42:22,926 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-10-24 00:42:22,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:42:22,927 INFO L225 Difference]: With dead ends: 105 [2020-10-24 00:42:22,927 INFO L226 Difference]: Without dead ends: 98 [2020-10-24 00:42:22,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=552, Invalid=5300, Unknown=0, NotChecked=0, Total=5852 [2020-10-24 00:42:22,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-24 00:42:22,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2020-10-24 00:42:22,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-24 00:42:22,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-10-24 00:42:22,966 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 175 [2020-10-24 00:42:22,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:42:22,966 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-10-24 00:42:22,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-24 00:42:22,966 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-10-24 00:42:22,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-24 00:42:22,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:42:22,968 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-10-24 00:42:22,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-24 00:42:22,968 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:42:22,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:42:22,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1520258748, now seen corresponding path program 43 times [2020-10-24 00:42:22,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:42:22,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886225890] [2020-10-24 00:42:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:42:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:23,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:42:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:23,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:42:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:23,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:23,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:23,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:23,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:23,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:24,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:24,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-24 00:42:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:24,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:24,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:24,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:25,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 38 proven. 321 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-10-24 00:42:25,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886225890] [2020-10-24 00:42:25,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:42:25,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-24 00:42:25,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471248818] [2020-10-24 00:42:25,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-24 00:42:25,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:42:25,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-24 00:42:25,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 00:42:25,274 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 35 states. [2020-10-24 00:42:26,682 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:42:26,945 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:42:27,155 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:42:27,472 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:42:27,806 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:42:28,055 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:28,399 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:28,670 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:42:28,932 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:29,257 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:29,560 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:42:29,795 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:42:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:42:32,781 INFO L93 Difference]: Finished difference Result 105 states and 132 transitions. [2020-10-24 00:42:32,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 00:42:32,783 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-10-24 00:42:32,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:42:32,785 INFO L225 Difference]: With dead ends: 105 [2020-10-24 00:42:32,785 INFO L226 Difference]: Without dead ends: 98 [2020-10-24 00:42:32,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=449, Invalid=3711, Unknown=0, NotChecked=0, Total=4160 [2020-10-24 00:42:32,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-24 00:42:32,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-10-24 00:42:32,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 00:42:32,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2020-10-24 00:42:32,826 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 145 [2020-10-24 00:42:32,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:42:32,826 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2020-10-24 00:42:32,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-24 00:42:32,826 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2020-10-24 00:42:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-24 00:42:32,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:42:32,827 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-10-24 00:42:32,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-24 00:42:32,828 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:42:32,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:42:32,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1472500335, now seen corresponding path program 44 times [2020-10-24 00:42:32,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:42:32,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735230696] [2020-10-24 00:42:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:42:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:32,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:42:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:32,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:42:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:33,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:33,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:33,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:33,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:33,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:33,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:34,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-24 00:42:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:34,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:34,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:34,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:34,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:35,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 43 proven. 380 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-10-24 00:42:35,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735230696] [2020-10-24 00:42:35,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:42:35,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-24 00:42:35,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74894065] [2020-10-24 00:42:35,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-24 00:42:35,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:42:35,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-24 00:42:35,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 00:42:35,210 INFO L87 Difference]: Start difference. First operand 93 states and 120 transitions. Second operand 37 states. [2020-10-24 00:42:36,950 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:42:37,233 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:42:37,466 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:42:37,755 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:42:38,143 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:42:38,411 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:38,763 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:39,102 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:42:39,327 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:39,605 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:39,950 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:42:40,163 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:40,433 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:42:40,781 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:42:41,028 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:42:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:42:43,691 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2020-10-24 00:42:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 00:42:43,693 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-10-24 00:42:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:42:43,695 INFO L225 Difference]: With dead ends: 105 [2020-10-24 00:42:43,695 INFO L226 Difference]: Without dead ends: 98 [2020-10-24 00:42:43,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=458, Invalid=3964, Unknown=0, NotChecked=0, Total=4422 [2020-10-24 00:42:43,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-24 00:42:43,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-10-24 00:42:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 00:42:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 119 transitions. [2020-10-24 00:42:43,735 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 119 transitions. Word has length 155 [2020-10-24 00:42:43,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:42:43,735 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 119 transitions. [2020-10-24 00:42:43,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-24 00:42:43,735 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 119 transitions. [2020-10-24 00:42:43,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-24 00:42:43,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:42:43,737 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-10-24 00:42:43,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-24 00:42:43,737 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:42:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:42:43,738 INFO L82 PathProgramCache]: Analyzing trace with hash -526892188, now seen corresponding path program 45 times [2020-10-24 00:42:43,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:42:43,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773907255] [2020-10-24 00:42:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:42:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:43,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:42:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:43,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:42:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:44,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:44,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:44,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:44,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:44,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:44,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:45,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-24 00:42:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:45,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:45,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:45,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:45,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:45,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:45,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 48 proven. 412 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-24 00:42:45,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773907255] [2020-10-24 00:42:45,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:42:45,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-24 00:42:45,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016117252] [2020-10-24 00:42:45,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-24 00:42:45,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:42:45,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-24 00:42:45,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-10-24 00:42:45,366 INFO L87 Difference]: Start difference. First operand 93 states and 119 transitions. Second operand 26 states. [2020-10-24 00:42:51,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:42:51,564 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2020-10-24 00:42:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 00:42:51,566 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 165 [2020-10-24 00:42:51,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:42:51,568 INFO L225 Difference]: With dead ends: 105 [2020-10-24 00:42:51,568 INFO L226 Difference]: Without dead ends: 98 [2020-10-24 00:42:51,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=408, Invalid=2672, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 00:42:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-24 00:42:51,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-10-24 00:42:51,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 00:42:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-10-24 00:42:51,616 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 165 [2020-10-24 00:42:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:42:51,617 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-10-24 00:42:51,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-24 00:42:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-10-24 00:42:51,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-24 00:42:51,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:42:51,618 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-10-24 00:42:51,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-24 00:42:51,618 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:42:51,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:42:51,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2014632367, now seen corresponding path program 46 times [2020-10-24 00:42:51,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:42:51,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509798362] [2020-10-24 00:42:51,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:42:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:51,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:42:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:51,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:42:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:51,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:52,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:52,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:52,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:52,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:52,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:52,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-24 00:42:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:52,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 13 proven. 176 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-24 00:42:53,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509798362] [2020-10-24 00:42:53,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:42:53,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-24 00:42:53,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429580170] [2020-10-24 00:42:53,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-24 00:42:53,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:42:53,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-24 00:42:53,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-10-24 00:42:53,087 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 29 states. [2020-10-24 00:42:54,371 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-24 00:42:54,610 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-24 00:42:54,798 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-24 00:42:58,714 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-24 00:42:59,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:42:59,079 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2020-10-24 00:42:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 00:42:59,081 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-10-24 00:42:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:42:59,083 INFO L225 Difference]: With dead ends: 105 [2020-10-24 00:42:59,083 INFO L226 Difference]: Without dead ends: 98 [2020-10-24 00:42:59,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=422, Invalid=3000, Unknown=0, NotChecked=0, Total=3422 [2020-10-24 00:42:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-24 00:42:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-10-24 00:42:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 00:42:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2020-10-24 00:42:59,122 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 115 [2020-10-24 00:42:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:42:59,122 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2020-10-24 00:42:59,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-24 00:42:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2020-10-24 00:42:59,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-24 00:42:59,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:42:59,124 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-10-24 00:42:59,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-24 00:42:59,124 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:42:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:42:59,124 INFO L82 PathProgramCache]: Analyzing trace with hash 981230287, now seen corresponding path program 47 times [2020-10-24 00:42:59,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:42:59,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395228144] [2020-10-24 00:42:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:42:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:59,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:42:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:59,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:42:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:59,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:59,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:59,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:59,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:42:59,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:42:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:00,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:00,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-24 00:43:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:00,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:00,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:01,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:01,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:01,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:01,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:01,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 55 proven. 511 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-10-24 00:43:02,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395228144] [2020-10-24 00:43:02,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:43:02,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-24 00:43:02,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692997449] [2020-10-24 00:43:02,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-24 00:43:02,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:43:02,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-24 00:43:02,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 00:43:02,207 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand 41 states. [2020-10-24 00:43:04,006 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:43:04,313 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:43:04,555 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:43:04,950 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:43:05,364 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:43:05,643 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:06,046 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:06,355 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:43:06,603 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:06,976 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:07,308 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:43:07,537 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:07,886 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:08,193 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:43:08,424 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:08,770 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:09,059 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:43:09,299 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:43:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:43:12,163 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2020-10-24 00:43:12,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 00:43:12,166 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-10-24 00:43:12,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:43:12,167 INFO L225 Difference]: With dead ends: 105 [2020-10-24 00:43:12,167 INFO L226 Difference]: Without dead ends: 98 [2020-10-24 00:43:12,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=514, Invalid=4888, Unknown=0, NotChecked=0, Total=5402 [2020-10-24 00:43:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-24 00:43:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-10-24 00:43:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 00:43:12,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-10-24 00:43:12,205 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 175 [2020-10-24 00:43:12,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:43:12,205 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-10-24 00:43:12,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-24 00:43:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-10-24 00:43:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-24 00:43:12,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:43:12,206 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-10-24 00:43:12,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-24 00:43:12,206 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:43:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:43:12,207 INFO L82 PathProgramCache]: Analyzing trace with hash -892159473, now seen corresponding path program 48 times [2020-10-24 00:43:12,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:43:12,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665151138] [2020-10-24 00:43:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:43:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:12,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:43:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:12,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:43:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:12,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:12,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:12,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:12,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:12,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:13,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:13,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-24 00:43:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:13,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:13,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:13,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 33 proven. 267 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-24 00:43:14,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665151138] [2020-10-24 00:43:14,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:43:14,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-24 00:43:14,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360908877] [2020-10-24 00:43:14,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-24 00:43:14,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:43:14,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-24 00:43:14,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 00:43:14,109 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 33 states. [2020-10-24 00:43:15,442 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:43:15,701 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:43:15,915 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:43:16,231 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-24 00:43:16,567 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-24 00:43:16,817 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:43:17,151 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:17,418 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:43:17,643 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:43:20,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:43:20,950 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2020-10-24 00:43:20,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 00:43:20,951 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-10-24 00:43:20,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:43:20,952 INFO L225 Difference]: With dead ends: 105 [2020-10-24 00:43:20,952 INFO L226 Difference]: Without dead ends: 98 [2020-10-24 00:43:20,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2020-10-24 00:43:20,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-24 00:43:20,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-10-24 00:43:20,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 00:43:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2020-10-24 00:43:20,991 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 135 [2020-10-24 00:43:20,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:43:20,991 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2020-10-24 00:43:20,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-24 00:43:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2020-10-24 00:43:20,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-24 00:43:20,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:43:20,994 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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] [2020-10-24 00:43:20,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-24 00:43:20,994 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:43:20,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:43:20,994 INFO L82 PathProgramCache]: Analyzing trace with hash -971334268, now seen corresponding path program 49 times [2020-10-24 00:43:20,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:43:20,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299276209] [2020-10-24 00:43:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:43:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:21,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:43:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:21,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:43:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:21,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:21,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:21,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:21,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:21,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:22,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:22,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-24 00:43:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:22,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:22,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:22,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:23,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:23,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:23,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:23,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:24,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 60 proven. 585 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-10-24 00:43:24,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299276209] [2020-10-24 00:43:24,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:43:24,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-24 00:43:24,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332526621] [2020-10-24 00:43:24,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-24 00:43:24,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:43:24,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-24 00:43:24,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2020-10-24 00:43:24,470 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand 43 states. [2020-10-24 00:43:26,364 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:43:26,739 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:43:27,016 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:43:27,380 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:43:27,861 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:43:28,205 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:28,662 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:29,093 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:43:29,369 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:29,696 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:30,103 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:43:30,383 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:30,750 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:31,163 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:43:31,437 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:31,798 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:43:32,244 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:43:32,538 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:43:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:43:36,814 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2020-10-24 00:43:36,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-24 00:43:36,818 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 185 [2020-10-24 00:43:36,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:43:36,819 INFO L225 Difference]: With dead ends: 105 [2020-10-24 00:43:36,819 INFO L226 Difference]: Without dead ends: 98 [2020-10-24 00:43:36,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=561, Invalid=5601, Unknown=0, NotChecked=0, Total=6162 [2020-10-24 00:43:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-24 00:43:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-10-24 00:43:36,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 00:43:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-10-24 00:43:36,860 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 185 [2020-10-24 00:43:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:43:36,860 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-10-24 00:43:36,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-24 00:43:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-10-24 00:43:36,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-24 00:43:36,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:43:36,861 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-10-24 00:43:36,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-24 00:43:36,862 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:43:36,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:43:36,862 INFO L82 PathProgramCache]: Analyzing trace with hash -299112668, now seen corresponding path program 50 times [2020-10-24 00:43:36,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:43:36,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108409393] [2020-10-24 00:43:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:43:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:37,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:43:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:37,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:43:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:37,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:37,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:37,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:37,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:37,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:38,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:38,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-24 00:43:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:38,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:38,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 28 proven. 218 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-10-24 00:43:38,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108409393] [2020-10-24 00:43:38,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:43:38,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-24 00:43:38,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719015586] [2020-10-24 00:43:38,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-24 00:43:38,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:43:38,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-24 00:43:38,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-10-24 00:43:38,914 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 31 states. [2020-10-24 00:43:40,500 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:43:40,819 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:43:41,069 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:43:41,371 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:43:41,760 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-24 00:43:42,045 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:43:46,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:43:46,289 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2020-10-24 00:43:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 00:43:46,291 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-10-24 00:43:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:43:46,293 INFO L225 Difference]: With dead ends: 105 [2020-10-24 00:43:46,293 INFO L226 Difference]: Without dead ends: 98 [2020-10-24 00:43:46,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=431, Invalid=3229, Unknown=0, NotChecked=0, Total=3660 [2020-10-24 00:43:46,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-24 00:43:46,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2020-10-24 00:43:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-24 00:43:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-10-24 00:43:46,332 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 125 [2020-10-24 00:43:46,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:43:46,332 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-10-24 00:43:46,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-24 00:43:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-10-24 00:43:46,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-24 00:43:46,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:43:46,333 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-10-24 00:43:46,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-24 00:43:46,333 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:43:46,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:43:46,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1455465924, now seen corresponding path program 51 times [2020-10-24 00:43:46,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:43:46,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87552893] [2020-10-24 00:43:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:43:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:46,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:43:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:46,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:43:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:46,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:46,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-24 00:43:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:46,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:47,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:47,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:47,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:47,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:47,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:47,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:48,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:48,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 47 proven. 298 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2020-10-24 00:43:48,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87552893] [2020-10-24 00:43:48,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:43:48,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-24 00:43:48,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836806691] [2020-10-24 00:43:48,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-24 00:43:48,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:43:48,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-24 00:43:48,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 00:43:48,861 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 35 states. [2020-10-24 00:43:50,443 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-24 00:43:50,736 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-24 00:43:50,959 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-24 00:43:57,539 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-24 00:43:57,733 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-24 00:43:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:43:58,032 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2020-10-24 00:43:58,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-24 00:43:58,035 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-10-24 00:43:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:43:58,037 INFO L225 Difference]: With dead ends: 110 [2020-10-24 00:43:58,037 INFO L226 Difference]: Without dead ends: 103 [2020-10-24 00:43:58,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=563, Invalid=4839, Unknown=0, NotChecked=0, Total=5402 [2020-10-24 00:43:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-24 00:43:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-10-24 00:43:58,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 00:43:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-10-24 00:43:58,087 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 145 [2020-10-24 00:43:58,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:43:58,087 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-10-24 00:43:58,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-24 00:43:58,087 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-10-24 00:43:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-24 00:43:58,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:43:58,089 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-10-24 00:43:58,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-24 00:43:58,089 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:43:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:43:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1193498479, now seen corresponding path program 52 times [2020-10-24 00:43:58,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:43:58,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143629195] [2020-10-24 00:43:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:43:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:58,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:43:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:58,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:43:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:58,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:58,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:58,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-24 00:43:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:58,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:59,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:59,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:59,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:43:59,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:43:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:00,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:00,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:00,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:00,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 49 proven. 374 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-10-24 00:44:01,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143629195] [2020-10-24 00:44:01,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:44:01,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-24 00:44:01,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699692621] [2020-10-24 00:44:01,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-24 00:44:01,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:44:01,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-24 00:44:01,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 00:44:01,064 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 37 states. [2020-10-24 00:44:02,692 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:44:03,022 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:44:03,278 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:44:03,590 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:44:03,980 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-24 00:44:04,274 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:44:10,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:44:10,830 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-10-24 00:44:10,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-24 00:44:10,830 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-10-24 00:44:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:44:10,832 INFO L225 Difference]: With dead ends: 114 [2020-10-24 00:44:10,832 INFO L226 Difference]: Without dead ends: 107 [2020-10-24 00:44:10,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=572, Invalid=5128, Unknown=0, NotChecked=0, Total=5700 [2020-10-24 00:44:10,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-24 00:44:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-10-24 00:44:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 00:44:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-10-24 00:44:10,880 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 155 [2020-10-24 00:44:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:44:10,880 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-10-24 00:44:10,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-24 00:44:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-10-24 00:44:10,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-24 00:44:10,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:44:10,882 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-10-24 00:44:10,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-24 00:44:10,882 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:44:10,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:44:10,882 INFO L82 PathProgramCache]: Analyzing trace with hash 775406948, now seen corresponding path program 53 times [2020-10-24 00:44:10,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:44:10,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584304743] [2020-10-24 00:44:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:44:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:11,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:44:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:11,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:44:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:11,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:11,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:11,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:11,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-24 00:44:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:11,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:12,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:12,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:12,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:12,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:12,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:12,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:13,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:13,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 53 proven. 439 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-10-24 00:44:13,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584304743] [2020-10-24 00:44:13,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:44:13,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-24 00:44:13,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67609392] [2020-10-24 00:44:13,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-24 00:44:13,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:44:13,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-24 00:44:13,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 00:44:13,737 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 39 states. [2020-10-24 00:44:15,718 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:44:16,054 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:44:16,317 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:44:16,626 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:44:17,058 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:44:17,372 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:44:17,797 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:44:18,195 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:44:18,461 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:44:25,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:44:25,355 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-10-24 00:44:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-24 00:44:25,358 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-10-24 00:44:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:44:25,359 INFO L225 Difference]: With dead ends: 114 [2020-10-24 00:44:25,360 INFO L226 Difference]: Without dead ends: 107 [2020-10-24 00:44:25,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=581, Invalid=5425, Unknown=0, NotChecked=0, Total=6006 [2020-10-24 00:44:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-24 00:44:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-10-24 00:44:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 00:44:25,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-10-24 00:44:25,398 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 165 [2020-10-24 00:44:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:44:25,398 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-10-24 00:44:25,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-24 00:44:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-10-24 00:44:25,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-24 00:44:25,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:44:25,399 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-10-24 00:44:25,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-24 00:44:25,399 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:44:25,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:44:25,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1395808945, now seen corresponding path program 54 times [2020-10-24 00:44:25,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:44:25,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599537083] [2020-10-24 00:44:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:44:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:25,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:44:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:25,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:44:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:25,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:25,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:25,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:26,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:26,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-24 00:44:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:26,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:26,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:27,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:27,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:27,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:27,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:27,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:28,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:28,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 57 proven. 509 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-10-24 00:44:28,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599537083] [2020-10-24 00:44:28,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:44:28,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-24 00:44:28,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685093751] [2020-10-24 00:44:28,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-24 00:44:28,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:44:28,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-24 00:44:28,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 00:44:28,758 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 41 states. [2020-10-24 00:44:30,625 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:44:31,005 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:44:31,282 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:44:31,629 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:44:32,082 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:44:32,409 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:44:32,850 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:44:33,266 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:44:33,552 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:44:33,907 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:44:34,359 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:44:34,647 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:44:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:44:40,763 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-10-24 00:44:40,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-24 00:44:40,767 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-10-24 00:44:40,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:44:40,769 INFO L225 Difference]: With dead ends: 114 [2020-10-24 00:44:40,769 INFO L226 Difference]: Without dead ends: 107 [2020-10-24 00:44:40,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=590, Invalid=5730, Unknown=0, NotChecked=0, Total=6320 [2020-10-24 00:44:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-24 00:44:40,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-10-24 00:44:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 00:44:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-10-24 00:44:40,827 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 175 [2020-10-24 00:44:40,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:44:40,827 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-10-24 00:44:40,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-24 00:44:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-10-24 00:44:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-24 00:44:40,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:44:40,828 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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] [2020-10-24 00:44:40,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-24 00:44:40,829 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:44:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:44:40,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2138313468, now seen corresponding path program 55 times [2020-10-24 00:44:40,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:44:40,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912736032] [2020-10-24 00:44:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:44:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:41,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:44:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:41,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:44:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:41,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:41,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:41,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:41,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:42,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:42,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-24 00:44:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:42,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:42,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:43,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:43,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:43,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:43,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:44,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:44,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:45,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:44:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:44:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 61 proven. 584 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-10-24 00:44:45,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912736032] [2020-10-24 00:44:45,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:44:45,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-24 00:44:45,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749816698] [2020-10-24 00:44:45,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-24 00:44:45,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:44:45,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-24 00:44:45,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2020-10-24 00:44:45,345 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 43 states. [2020-10-24 00:44:47,603 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:44:48,037 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:44:48,364 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:44:48,871 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:44:49,438 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:44:49,857 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:44:50,428 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:44:50,878 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:44:51,230 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:44:51,731 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:44:52,164 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:44:52,502 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:44:53,015 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:44:53,457 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:44:53,802 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:45:00,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:45:00,158 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-10-24 00:45:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-24 00:45:00,158 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 185 [2020-10-24 00:45:00,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:45:00,160 INFO L225 Difference]: With dead ends: 114 [2020-10-24 00:45:00,160 INFO L226 Difference]: Without dead ends: 107 [2020-10-24 00:45:00,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=599, Invalid=6043, Unknown=0, NotChecked=0, Total=6642 [2020-10-24 00:45:00,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-24 00:45:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-10-24 00:45:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 00:45:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-10-24 00:45:00,212 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 185 [2020-10-24 00:45:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:45:00,212 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-10-24 00:45:00,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-24 00:45:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-10-24 00:45:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-24 00:45:00,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:45:00,213 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 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] [2020-10-24 00:45:00,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-24 00:45:00,214 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:45:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:45:00,214 INFO L82 PathProgramCache]: Analyzing trace with hash 470559535, now seen corresponding path program 56 times [2020-10-24 00:45:00,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:45:00,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467646502] [2020-10-24 00:45:00,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:45:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:00,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:45:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:00,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:45:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:00,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:00,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:00,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:01,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:01,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:01,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:01,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-24 00:45:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:02,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:02,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:02,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:02,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:03,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:03,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:03,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:04,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:04,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 65 proven. 664 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-10-24 00:45:04,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467646502] [2020-10-24 00:45:04,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:45:04,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-24 00:45:04,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726285100] [2020-10-24 00:45:04,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-24 00:45:04,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:45:04,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-24 00:45:04,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1866, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 00:45:04,734 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 45 states. [2020-10-24 00:45:07,243 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:45:07,700 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:45:08,075 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:45:08,628 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:45:09,248 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:45:09,695 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:45:10,309 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:45:10,727 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:45:11,060 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:45:11,568 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:45:12,053 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:45:12,447 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:45:13,017 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:45:13,516 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:45:13,892 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:45:14,447 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:45:14,929 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:45:15,313 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:45:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:45:21,447 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2020-10-24 00:45:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-24 00:45:21,447 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 195 [2020-10-24 00:45:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:45:21,448 INFO L225 Difference]: With dead ends: 110 [2020-10-24 00:45:21,448 INFO L226 Difference]: Without dead ends: 103 [2020-10-24 00:45:21,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=608, Invalid=6364, Unknown=0, NotChecked=0, Total=6972 [2020-10-24 00:45:21,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-24 00:45:21,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2020-10-24 00:45:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-24 00:45:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2020-10-24 00:45:21,495 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 195 [2020-10-24 00:45:21,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:45:21,495 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2020-10-24 00:45:21,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-24 00:45:21,495 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2020-10-24 00:45:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-24 00:45:21,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:45:21,496 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-10-24 00:45:21,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-24 00:45:21,497 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:45:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:45:21,497 INFO L82 PathProgramCache]: Analyzing trace with hash 289242404, now seen corresponding path program 57 times [2020-10-24 00:45:21,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:45:21,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975555195] [2020-10-24 00:45:21,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:45:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:21,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:45:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:21,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:45:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:22,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:22,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:22,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:22,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:22,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:22,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:23,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:23,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-24 00:45:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:23,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 15 proven. 221 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-24 00:45:24,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975555195] [2020-10-24 00:45:24,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:45:24,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-24 00:45:24,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588798175] [2020-10-24 00:45:24,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-24 00:45:24,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:45:24,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-24 00:45:24,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-10-24 00:45:24,137 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand 31 states. [2020-10-24 00:45:26,101 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-24 00:45:26,478 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-24 00:45:26,770 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-24 00:45:33,816 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-24 00:45:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:45:34,241 INFO L93 Difference]: Finished difference Result 110 states and 140 transitions. [2020-10-24 00:45:34,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 00:45:34,245 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-10-24 00:45:34,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:45:34,247 INFO L225 Difference]: With dead ends: 110 [2020-10-24 00:45:34,247 INFO L226 Difference]: Without dead ends: 103 [2020-10-24 00:45:34,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=469, Invalid=3563, Unknown=0, NotChecked=0, Total=4032 [2020-10-24 00:45:34,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-24 00:45:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-10-24 00:45:34,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 00:45:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2020-10-24 00:45:34,291 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 125 [2020-10-24 00:45:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:45:34,291 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2020-10-24 00:45:34,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-24 00:45:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2020-10-24 00:45:34,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-24 00:45:34,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:45:34,292 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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] [2020-10-24 00:45:34,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-24 00:45:34,293 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:45:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:45:34,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2070355772, now seen corresponding path program 58 times [2020-10-24 00:45:34,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:45:34,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807612716] [2020-10-24 00:45:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:45:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:34,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:45:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:34,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:45:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:35,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:35,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:35,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:35,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:35,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:36,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:36,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:37,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-24 00:45:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:37,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:37,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:37,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:37,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:37,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:37,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:37,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 57 proven. 551 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-24 00:45:37,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807612716] [2020-10-24 00:45:37,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:45:37,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-24 00:45:37,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193980731] [2020-10-24 00:45:37,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 00:45:37,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:45:37,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 00:45:37,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2020-10-24 00:45:37,258 INFO L87 Difference]: Start difference. First operand 98 states and 128 transitions. Second operand 28 states. [2020-10-24 00:45:39,612 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-24 00:45:40,669 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-24 00:45:42,401 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:45:43,294 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:45:44,224 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:45:45,158 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 00:45:47,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:45:47,810 INFO L93 Difference]: Finished difference Result 110 states and 139 transitions. [2020-10-24 00:45:47,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 00:45:47,817 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 185 [2020-10-24 00:45:47,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:45:47,818 INFO L225 Difference]: With dead ends: 110 [2020-10-24 00:45:47,818 INFO L226 Difference]: Without dead ends: 103 [2020-10-24 00:45:47,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=455, Invalid=3205, Unknown=0, NotChecked=0, Total=3660 [2020-10-24 00:45:47,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-24 00:45:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-10-24 00:45:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 00:45:47,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2020-10-24 00:45:47,866 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 185 [2020-10-24 00:45:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:45:47,867 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2020-10-24 00:45:47,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 00:45:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2020-10-24 00:45:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-24 00:45:47,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:45:47,868 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-10-24 00:45:47,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-24 00:45:47,869 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:45:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:45:47,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1905288711, now seen corresponding path program 59 times [2020-10-24 00:45:47,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:45:47,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72300636] [2020-10-24 00:45:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:45:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:48,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:45:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:48,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:45:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:48,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:48,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:48,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:49,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:49,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:49,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:50,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:50,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-24 00:45:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:51,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:51,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:51,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:52,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:45:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:45:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 42 proven. 381 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-10-24 00:45:52,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72300636] [2020-10-24 00:45:52,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:45:52,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-24 00:45:52,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839122989] [2020-10-24 00:45:52,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-24 00:45:52,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:45:52,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-24 00:45:52,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 00:45:52,290 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand 37 states. [2020-10-24 00:45:55,244 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:45:55,731 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:45:56,129 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:45:56,733 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:45:57,402 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:45:57,902 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:45:58,581 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:45:59,093 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:45:59,493 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:46:00,101 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:46:00,646 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:46:01,061 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:46:01,953 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 00:46:02,747 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:46:03,151 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:46:03,937 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:46:04,350 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:46:07,265 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 00:46:08,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:46:08,055 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2020-10-24 00:46:08,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 00:46:08,060 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-10-24 00:46:08,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:46:08,062 INFO L225 Difference]: With dead ends: 110 [2020-10-24 00:46:08,062 INFO L226 Difference]: Without dead ends: 103 [2020-10-24 00:46:08,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=496, Invalid=4334, Unknown=0, NotChecked=0, Total=4830 [2020-10-24 00:46:08,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-24 00:46:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-10-24 00:46:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 00:46:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2020-10-24 00:46:08,106 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 155 [2020-10-24 00:46:08,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:46:08,107 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2020-10-24 00:46:08,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-24 00:46:08,107 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2020-10-24 00:46:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-24 00:46:08,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:46:08,108 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 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] [2020-10-24 00:46:08,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-24 00:46:08,109 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:46:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:46:08,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1197337913, now seen corresponding path program 60 times [2020-10-24 00:46:08,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:46:08,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158022976] [2020-10-24 00:46:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:46:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:08,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:46:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:08,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:46:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:08,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:08,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:09,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:09,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:09,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:09,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:10,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:10,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-24 00:46:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:11,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:11,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:12,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:12,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:13,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:13,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:14,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:14,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 64 proven. 665 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-10-24 00:46:15,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158022976] [2020-10-24 00:46:15,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:46:15,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-24 00:46:15,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665127044] [2020-10-24 00:46:15,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-24 00:46:15,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:46:15,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-24 00:46:15,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1866, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 00:46:15,175 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand 45 states. [2020-10-24 00:46:18,623 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:46:19,176 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:46:19,596 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:46:20,223 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:46:20,944 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:46:21,456 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:46:22,189 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:46:22,748 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:46:23,163 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:46:23,815 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:46:24,379 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:46:24,798 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:46:25,449 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:46:26,005 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:46:26,426 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:46:27,066 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:46:27,596 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:46:28,020 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:46:28,665 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:46:29,217 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:46:29,643 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:46:31,084 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 00:46:35,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:46:35,046 INFO L93 Difference]: Finished difference Result 110 states and 137 transitions. [2020-10-24 00:46:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-24 00:46:35,052 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 195 [2020-10-24 00:46:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:46:35,053 INFO L225 Difference]: With dead ends: 110 [2020-10-24 00:46:35,053 INFO L226 Difference]: Without dead ends: 103 [2020-10-24 00:46:35,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=570, Invalid=5910, Unknown=0, NotChecked=0, Total=6480 [2020-10-24 00:46:35,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-24 00:46:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-10-24 00:46:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 00:46:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 125 transitions. [2020-10-24 00:46:35,104 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 125 transitions. Word has length 195 [2020-10-24 00:46:35,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:46:35,104 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 125 transitions. [2020-10-24 00:46:35,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-24 00:46:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 125 transitions. [2020-10-24 00:46:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-24 00:46:35,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:46:35,105 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-10-24 00:46:35,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-24 00:46:35,106 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:46:35,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:46:35,106 INFO L82 PathProgramCache]: Analyzing trace with hash -542475175, now seen corresponding path program 61 times [2020-10-24 00:46:35,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:46:35,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773600864] [2020-10-24 00:46:35,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:46:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:35,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:46:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:35,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:46:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:35,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:35,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:36,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:36,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:36,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:36,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:37,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:37,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-24 00:46:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:38,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:38,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 32 proven. 268 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-24 00:46:38,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773600864] [2020-10-24 00:46:38,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:46:38,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-24 00:46:38,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167496214] [2020-10-24 00:46:38,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-24 00:46:38,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:46:38,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-24 00:46:38,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 00:46:38,622 INFO L87 Difference]: Start difference. First operand 98 states and 125 transitions. Second operand 33 states. [2020-10-24 00:46:40,589 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:46:41,016 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:46:41,366 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:46:41,799 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:46:42,304 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-24 00:46:42,683 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:46:44,454 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:46:45,402 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:46:47,145 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:46:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:46:49,996 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2020-10-24 00:46:49,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 00:46:49,997 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-10-24 00:46:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:46:49,998 INFO L225 Difference]: With dead ends: 110 [2020-10-24 00:46:49,998 INFO L226 Difference]: Without dead ends: 103 [2020-10-24 00:46:49,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=478, Invalid=3812, Unknown=0, NotChecked=0, Total=4290 [2020-10-24 00:46:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-24 00:46:50,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-10-24 00:46:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 00:46:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2020-10-24 00:46:50,047 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 135 [2020-10-24 00:46:50,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:46:50,047 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2020-10-24 00:46:50,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-24 00:46:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2020-10-24 00:46:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-24 00:46:50,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:46:50,048 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-10-24 00:46:50,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-24 00:46:50,049 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:46:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:46:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1714688260, now seen corresponding path program 62 times [2020-10-24 00:46:50,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:46:50,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714831273] [2020-10-24 00:46:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:46:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:50,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:46:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:50,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:46:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:50,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:50,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:50,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:51,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:51,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:51,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:52,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:52,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-24 00:46:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:52,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:53,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:53,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:46:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:46:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 37 proven. 322 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-10-24 00:46:53,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714831273] [2020-10-24 00:46:53,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:46:53,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-24 00:46:53,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929196055] [2020-10-24 00:46:53,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-24 00:46:53,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:46:53,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-24 00:46:53,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 00:46:53,806 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand 35 states. [2020-10-24 00:46:55,934 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:46:56,327 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:46:56,680 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:46:57,183 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:46:57,751 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:46:58,197 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:46:58,768 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:46:59,229 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:46:59,608 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:47:00,343 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 00:47:00,608 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:47:01,378 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:47:02,085 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:47:02,497 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:47:03,318 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:47:03,714 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:47:04,013 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:47:06,729 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 00:47:07,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:47:07,256 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-10-24 00:47:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 00:47:07,263 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-10-24 00:47:07,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:47:07,265 INFO L225 Difference]: With dead ends: 110 [2020-10-24 00:47:07,265 INFO L226 Difference]: Without dead ends: 103 [2020-10-24 00:47:07,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=487, Invalid=4069, Unknown=0, NotChecked=0, Total=4556 [2020-10-24 00:47:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-24 00:47:07,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-10-24 00:47:07,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 00:47:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 123 transitions. [2020-10-24 00:47:07,317 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 123 transitions. Word has length 145 [2020-10-24 00:47:07,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:47:07,317 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 123 transitions. [2020-10-24 00:47:07,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-24 00:47:07,318 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 123 transitions. [2020-10-24 00:47:07,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-24 00:47:07,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:47:07,319 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-10-24 00:47:07,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-24 00:47:07,319 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:47:07,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:47:07,320 INFO L82 PathProgramCache]: Analyzing trace with hash -377365276, now seen corresponding path program 63 times [2020-10-24 00:47:07,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:47:07,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915193315] [2020-10-24 00:47:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:47:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:07,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:47:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:07,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:47:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:07,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:08,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:08,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:08,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:09,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:09,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:09,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:10,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-24 00:47:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:10,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:10,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:11,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:11,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:11,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 47 proven. 445 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-10-24 00:47:12,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915193315] [2020-10-24 00:47:12,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:47:12,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-24 00:47:12,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129010201] [2020-10-24 00:47:12,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-24 00:47:12,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:47:12,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-24 00:47:12,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 00:47:12,231 INFO L87 Difference]: Start difference. First operand 98 states and 123 transitions. Second operand 39 states. [2020-10-24 00:47:15,213 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:47:15,817 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:47:16,449 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-24 00:47:16,936 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:47:17,657 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:47:18,501 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:47:19,099 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:47:19,953 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:47:20,577 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:47:21,087 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:47:21,745 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:47:22,241 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:47:22,629 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:47:23,232 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:47:23,743 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:47:24,157 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:47:25,036 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 00:47:26,214 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:47:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:47:29,657 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2020-10-24 00:47:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 00:47:29,663 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-10-24 00:47:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:47:29,664 INFO L225 Difference]: With dead ends: 110 [2020-10-24 00:47:29,664 INFO L226 Difference]: Without dead ends: 103 [2020-10-24 00:47:29,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=505, Invalid=4607, Unknown=0, NotChecked=0, Total=5112 [2020-10-24 00:47:29,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-24 00:47:29,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-10-24 00:47:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 00:47:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2020-10-24 00:47:29,698 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 165 [2020-10-24 00:47:29,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:47:29,698 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2020-10-24 00:47:29,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-24 00:47:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2020-10-24 00:47:29,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-24 00:47:29,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:47:29,700 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-10-24 00:47:29,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-24 00:47:29,700 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:47:29,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:47:29,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1380368281, now seen corresponding path program 64 times [2020-10-24 00:47:29,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:47:29,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155902431] [2020-10-24 00:47:29,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:47:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:29,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:47:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:29,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:47:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:30,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:30,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:30,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:30,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:30,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:31,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:31,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:32,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-24 00:47:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:32,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:32,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:33,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:33,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:34,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:34,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 52 proven. 514 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-10-24 00:47:34,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155902431] [2020-10-24 00:47:34,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:47:34,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-24 00:47:34,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434698055] [2020-10-24 00:47:34,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-24 00:47:34,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:47:34,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-24 00:47:34,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 00:47:34,755 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand 41 states. [2020-10-24 00:47:37,748 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:47:38,288 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:47:38,725 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:47:39,364 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:47:40,099 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:47:40,617 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:47:41,310 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:47:41,858 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:47:42,274 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:47:42,901 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:47:43,460 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:47:43,883 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:47:44,530 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:47:45,082 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:47:45,510 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:47:46,164 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:47:46,737 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:47:47,190 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:47:48,193 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 00:47:51,632 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 00:47:51,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:47:51,969 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2020-10-24 00:47:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 00:47:51,975 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-10-24 00:47:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:47:51,977 INFO L225 Difference]: With dead ends: 110 [2020-10-24 00:47:51,977 INFO L226 Difference]: Without dead ends: 103 [2020-10-24 00:47:51,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=514, Invalid=4888, Unknown=0, NotChecked=0, Total=5402 [2020-10-24 00:47:51,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-24 00:47:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-10-24 00:47:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 00:47:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-10-24 00:47:52,026 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 175 [2020-10-24 00:47:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:47:52,026 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-10-24 00:47:52,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-24 00:47:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-10-24 00:47:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-24 00:47:52,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:47:52,028 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 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] [2020-10-24 00:47:52,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-24 00:47:52,028 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:47:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:47:52,029 INFO L82 PathProgramCache]: Analyzing trace with hash -26534748, now seen corresponding path program 65 times [2020-10-24 00:47:52,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:47:52,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025838856] [2020-10-24 00:47:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:47:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:52,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:47:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:52,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:47:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:52,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:52,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:52,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:53,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:53,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:53,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:54,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:54,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-24 00:47:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:55,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:55,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:56,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:56,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:56,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:57,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:57,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:58,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:59,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:47:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:47:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 69 proven. 749 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2020-10-24 00:47:59,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025838856] [2020-10-24 00:47:59,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:47:59,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-24 00:47:59,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720367053] [2020-10-24 00:47:59,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-24 00:47:59,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:47:59,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-24 00:47:59,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2043, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 00:47:59,432 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 47 states. [2020-10-24 00:48:03,027 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:48:03,637 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:48:04,116 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:48:04,695 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:48:05,512 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:48:06,086 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:48:06,875 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:48:07,648 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:48:08,142 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:48:08,758 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:48:09,511 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:48:09,993 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:48:10,642 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:48:11,414 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:48:11,904 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:48:12,513 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:48:13,246 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:48:13,720 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:48:14,332 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:48:15,077 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:48:15,566 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:48:16,982 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 00:48:17,739 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:48:18,821 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:48:19,651 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:48:20,044 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:48:22,005 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:48:22,638 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 00:48:22,987 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 00:48:23,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:48:23,965 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2020-10-24 00:48:23,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-24 00:48:23,973 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 205 [2020-10-24 00:48:23,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:48:23,975 INFO L225 Difference]: With dead ends: 110 [2020-10-24 00:48:23,975 INFO L226 Difference]: Without dead ends: 103 [2020-10-24 00:48:23,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=617, Invalid=6693, Unknown=0, NotChecked=0, Total=7310 [2020-10-24 00:48:23,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-24 00:48:24,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2020-10-24 00:48:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-24 00:48:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2020-10-24 00:48:24,027 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 205 [2020-10-24 00:48:24,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:48:24,028 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2020-10-24 00:48:24,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-24 00:48:24,028 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2020-10-24 00:48:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-24 00:48:24,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:48:24,029 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-10-24 00:48:24,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-24 00:48:24,029 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:48:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:48:24,030 INFO L82 PathProgramCache]: Analyzing trace with hash -558382087, now seen corresponding path program 66 times [2020-10-24 00:48:24,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:48:24,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657908216] [2020-10-24 00:48:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:48:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:24,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:48:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:24,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:48:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:24,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:24,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-24 00:48:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:25,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:25,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:25,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:26,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:26,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:26,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:27,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:27,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:28,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:29,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 52 proven. 355 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-10-24 00:48:29,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657908216] [2020-10-24 00:48:29,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:48:29,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-24 00:48:29,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315207511] [2020-10-24 00:48:29,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-24 00:48:29,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:48:29,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-24 00:48:29,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 00:48:29,919 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand 37 states. [2020-10-24 00:48:32,132 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-24 00:48:32,505 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-10-24 00:48:32,899 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-10-24 00:48:33,383 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 00:48:34,043 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-24 00:48:34,726 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-24 00:48:35,238 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-24 00:48:35,760 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-24 00:48:36,558 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 00:48:37,165 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:48:38,075 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-24 00:48:38,711 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-24 00:48:39,134 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:48:39,701 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-24 00:48:40,302 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-24 00:48:40,671 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:48:41,218 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-24 00:48:41,915 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-24 00:48:42,315 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:48:42,867 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-24 00:48:43,544 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-24 00:48:43,947 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:48:44,509 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-24 00:48:45,213 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-24 00:48:45,631 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:48:46,178 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-24 00:48:46,852 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-24 00:48:47,246 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:48:47,806 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-24 00:48:48,517 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-24 00:48:48,938 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:48:49,493 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-24 00:48:50,191 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-24 00:48:50,587 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:48:53,626 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-24 00:48:54,216 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-24 00:48:54,687 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-24 00:48:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:48:55,097 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2020-10-24 00:48:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-24 00:48:55,107 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-10-24 00:48:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:48:55,109 INFO L225 Difference]: With dead ends: 115 [2020-10-24 00:48:55,109 INFO L226 Difference]: Without dead ends: 108 [2020-10-24 00:48:55,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=610, Invalid=5552, Unknown=0, NotChecked=0, Total=6162 [2020-10-24 00:48:55,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-24 00:48:55,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2020-10-24 00:48:55,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-24 00:48:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-10-24 00:48:55,149 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 155 [2020-10-24 00:48:55,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:48:55,149 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-10-24 00:48:55,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-24 00:48:55,149 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-10-24 00:48:55,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-24 00:48:55,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:48:55,150 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-10-24 00:48:55,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-24 00:48:55,150 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:48:55,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:48:55,151 INFO L82 PathProgramCache]: Analyzing trace with hash -789275676, now seen corresponding path program 67 times [2020-10-24 00:48:55,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:48:55,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637766710] [2020-10-24 00:48:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:48:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:55,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:48:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:55,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:48:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:55,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:56,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:56,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-24 00:48:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:57,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:57,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:57,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:58,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:58,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:59,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:59,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:48:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:00,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:00,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:01,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 54 proven. 438 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-10-24 00:49:02,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637766710] [2020-10-24 00:49:02,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:49:02,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-24 00:49:02,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119821023] [2020-10-24 00:49:02,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-24 00:49:02,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:49:02,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-24 00:49:02,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 00:49:02,068 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 39 states. [2020-10-24 00:49:04,544 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-24 00:49:05,695 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-10-24 00:49:06,190 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:49:06,879 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:49:07,607 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:49:08,156 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:49:08,884 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:49:09,905 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-24 00:49:10,498 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:49:11,250 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 00:49:12,299 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 00:49:12,651 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-24 00:49:13,071 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:14,105 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:14,914 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:49:15,402 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:16,111 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:17,015 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:49:17,544 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:18,136 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:18,850 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:49:19,345 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:20,082 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:21,014 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:49:21,547 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:22,187 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:23,071 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:49:23,603 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:24,317 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:25,251 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:49:25,776 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:26,484 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:27,419 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:49:27,957 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:49:30,269 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:49:31,008 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 00:49:31,338 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 00:49:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:49:32,851 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-10-24 00:49:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-24 00:49:32,861 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-10-24 00:49:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:49:32,864 INFO L225 Difference]: With dead ends: 119 [2020-10-24 00:49:32,864 INFO L226 Difference]: Without dead ends: 112 [2020-10-24 00:49:32,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=619, Invalid=5861, Unknown=0, NotChecked=0, Total=6480 [2020-10-24 00:49:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-24 00:49:32,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-10-24 00:49:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-24 00:49:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-10-24 00:49:32,909 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 165 [2020-10-24 00:49:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:49:32,910 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-10-24 00:49:32,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-24 00:49:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-10-24 00:49:32,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-24 00:49:32,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:49:32,911 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-10-24 00:49:32,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-24 00:49:32,911 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:49:32,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:49:32,912 INFO L82 PathProgramCache]: Analyzing trace with hash -838607975, now seen corresponding path program 68 times [2020-10-24 00:49:32,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:49:32,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127376519] [2020-10-24 00:49:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:49:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:33,387 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2020-10-24 00:49:33,623 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-24 00:49:33,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:49:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:33,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:49:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:34,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:34,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:35,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:35,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-24 00:49:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:36,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:36,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:37,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:37,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:38,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:39,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:40,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:40,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:41,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:42,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:49:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:49:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 58 proven. 508 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-10-24 00:49:43,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127376519] [2020-10-24 00:49:43,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:49:43,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-24 00:49:43,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039268491] [2020-10-24 00:49:43,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-24 00:49:43,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:49:43,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-24 00:49:43,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 00:49:43,376 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 41 states. [2020-10-24 00:49:45,739 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-24 00:49:46,257 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-24 00:49:46,792 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-24 00:49:47,327 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-10-24 00:49:47,883 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-10-24 00:49:48,536 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:49:49,390 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:49:50,352 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:49:51,093 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:49:52,276 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:49:53,639 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:49:54,611 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:49:55,950 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:49:57,015 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:49:57,804 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:49:58,431 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-10-24 00:49:59,017 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 00:49:59,835 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-24 00:50:00,442 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 00:50:00,877 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-10-24 00:50:01,469 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:02,632 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:03,467 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:50:04,048 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:05,054 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:05,863 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:50:06,452 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:07,456 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:08,292 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:50:08,875 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:09,888 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:10,700 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:50:11,283 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:12,283 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:12,896 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:50:13,364 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:14,242 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:15,050 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:50:15,623 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:18,927 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:50:19,770 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 00:50:20,219 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 00:50:21,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:50:21,080 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-10-24 00:50:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-24 00:50:21,093 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-10-24 00:50:21,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:50:21,095 INFO L225 Difference]: With dead ends: 119 [2020-10-24 00:50:21,095 INFO L226 Difference]: Without dead ends: 112 [2020-10-24 00:50:21,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=628, Invalid=6178, Unknown=0, NotChecked=0, Total=6806 [2020-10-24 00:50:21,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-24 00:50:21,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-10-24 00:50:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-24 00:50:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-10-24 00:50:21,148 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 175 [2020-10-24 00:50:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:50:21,148 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-10-24 00:50:21,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-24 00:50:21,148 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-10-24 00:50:21,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-24 00:50:21,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:50:21,150 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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] [2020-10-24 00:50:21,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-24 00:50:21,150 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:50:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:50:21,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1140911676, now seen corresponding path program 69 times [2020-10-24 00:50:21,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:50:21,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572269465] [2020-10-24 00:50:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:50:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:21,708 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-24 00:50:21,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:50:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:21,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:50:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:22,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:50:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:22,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:50:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:22,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:50:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:23,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:50:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:24,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-24 00:50:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:24,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:50:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:25,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:50:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:25,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:50:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:26,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:50:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:27,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:50:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:28,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:50:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:28,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:50:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:29,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:50:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:30,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:50:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:31,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:50:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:50:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 62 proven. 583 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-10-24 00:50:32,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572269465] [2020-10-24 00:50:32,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:50:32,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-24 00:50:32,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490220656] [2020-10-24 00:50:32,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-24 00:50:32,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:50:32,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-24 00:50:32,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2020-10-24 00:50:32,045 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 43 states. [2020-10-24 00:50:33,835 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-24 00:50:34,399 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-24 00:50:34,978 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-24 00:50:35,553 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-10-24 00:50:36,152 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-10-24 00:50:36,888 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:50:37,942 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:50:39,008 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-24 00:50:39,796 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:50:40,841 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-24 00:50:42,180 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-24 00:50:43,145 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:50:44,415 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:50:45,434 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:50:46,143 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:50:47,118 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:50:48,202 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:50:49,035 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:50:49,885 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 00:50:50,290 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-10-24 00:50:51,308 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 00:50:51,720 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-24 00:50:52,340 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:52,732 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-10-24 00:50:53,692 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:54,705 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:50:55,332 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:56,203 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:57,213 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:50:57,839 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:58,635 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:50:59,401 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:50:59,848 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:51:00,474 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:51:01,228 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:51:01,682 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:51:02,311 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:51:03,068 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:51:03,512 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:51:04,912 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:51:05,431 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 00:51:05,749 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 00:51:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:51:06,779 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-10-24 00:51:06,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-24 00:51:06,789 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 185 [2020-10-24 00:51:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:51:06,791 INFO L225 Difference]: With dead ends: 119 [2020-10-24 00:51:06,791 INFO L226 Difference]: Without dead ends: 112 [2020-10-24 00:51:06,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=637, Invalid=6503, Unknown=0, NotChecked=0, Total=7140 [2020-10-24 00:51:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-24 00:51:06,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-10-24 00:51:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-24 00:51:06,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-10-24 00:51:06,835 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 185 [2020-10-24 00:51:06,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:51:06,835 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-10-24 00:51:06,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-24 00:51:06,836 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-10-24 00:51:06,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-24 00:51:06,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:51:06,837 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 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] [2020-10-24 00:51:06,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-24 00:51:06,838 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:51:06,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:51:06,838 INFO L82 PathProgramCache]: Analyzing trace with hash 763558713, now seen corresponding path program 70 times [2020-10-24 00:51:06,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:51:06,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905638657] [2020-10-24 00:51:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:51:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:07,406 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-24 00:51:07,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:51:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:07,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:51:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:07,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:08,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:08,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:08,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:09,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:10,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-24 00:51:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:10,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:11,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:11,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:12,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:13,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:13,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:14,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:15,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:16,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:16,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-24 00:51:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:51:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 66 proven. 663 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-10-24 00:51:17,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905638657] [2020-10-24 00:51:17,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:51:17,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-24 00:51:17,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767313262] [2020-10-24 00:51:17,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-24 00:51:17,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:51:17,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-24 00:51:17,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1866, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 00:51:17,498 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 45 states. [2020-10-24 00:51:20,132 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-24 00:51:20,598 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-10-24 00:51:21,082 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-10-24 00:51:21,696 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:51:22,520 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-24 00:51:23,394 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-24 00:51:24,036 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-24 00:51:25,018 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-24 00:51:26,160 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-24 00:51:26,929 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:51:28,060 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:51:28,939 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:51:29,591 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:51:30,602 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:51:31,454 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-24 00:51:32,110 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:51:33,127 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-24 00:51:34,031 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-24 00:51:34,686 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-24 00:51:35,210 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-10-24 00:51:35,739 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 00:51:36,407 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-24 00:51:36,933 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 00:51:37,278 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-10-24 00:51:37,790 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:51:38,782 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:51:39,518 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:51:40,039 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:51:40,906 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:51:41,636 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:51:42,173 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:51:43,054 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:51:43,796 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:51:44,309 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:51:45,192 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:51:45,933 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-24 00:51:46,454 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-24 00:51:48,851 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-24 00:51:49,358 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-24 00:51:49,720 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-24 00:51:50,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:51:50,673 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-10-24 00:51:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-24 00:51:50,683 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 195 [2020-10-24 00:51:50,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:51:50,686 INFO L225 Difference]: With dead ends: 119 [2020-10-24 00:51:50,686 INFO L226 Difference]: Without dead ends: 112 [2020-10-24 00:51:50,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=646, Invalid=6836, Unknown=0, NotChecked=0, Total=7482 [2020-10-24 00:51:50,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-24 00:51:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-10-24 00:51:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-24 00:51:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-10-24 00:51:50,757 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 195 [2020-10-24 00:51:50,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:51:50,758 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-10-24 00:51:50,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-24 00:51:50,758 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-10-24 00:51:50,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-24 00:51:50,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:51:50,759 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 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] [2020-10-24 00:51:50,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-24 00:51:50,759 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:51:50,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:51:50,760 INFO L82 PathProgramCache]: Analyzing trace with hash -826818652, now seen corresponding path program 71 times [2020-10-24 00:51:50,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:51:50,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936077389] [2020-10-24 00:51:50,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:51:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat