/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/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:35:11,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:35:11,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:35:11,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 06:35:11,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:35:11,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:35:11,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:35:11,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:35:11,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:35:11,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:35:11,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:35:11,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:35:11,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:35:11,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:35:11,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:35:11,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:35:11,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:35:11,970 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:35:11,983 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:35:11,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:35:11,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:35:11,985 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:35:11,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:35:11,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:35:11,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:35:11,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:35:11,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:35:11,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:35:11,987 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:35:11,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:35:11,987 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:35:11,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:35:11,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:35:11,988 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:35:11,988 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:35:11,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:35:11,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:35:11,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:35:11,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:35:11,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:35:11,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:35:12,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:35:12,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:35:12,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:35:12,441 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:35:12,442 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:35:12,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-11-07 06:35:12,542 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f39e5ece/017e95f23e8e465ea3bfd305ac416d10/FLAGdfa854079 [2020-11-07 06:35:13,157 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:35:13,157 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2020-11-07 06:35:13,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f39e5ece/017e95f23e8e465ea3bfd305ac416d10/FLAGdfa854079 [2020-11-07 06:35:13,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f39e5ece/017e95f23e8e465ea3bfd305ac416d10 [2020-11-07 06:35:13,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:35:13,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:35:13,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:13,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:35:13,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:35:13,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:13" (1/1) ... [2020-11-07 06:35:13,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4574d412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:13, skipping insertion in model container [2020-11-07 06:35:13,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:13" (1/1) ... [2020-11-07 06:35:13,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:35:13,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:35:13,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:13,835 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:35:13,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:13,880 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:35:13,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:13 WrapperNode [2020-11-07 06:35:13,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:13,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:35:13,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:35:13,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:35:13,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:13" (1/1) ... [2020-11-07 06:35:13,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:13" (1/1) ... [2020-11-07 06:35:13,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:13" (1/1) ... [2020-11-07 06:35:13,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:13" (1/1) ... [2020-11-07 06:35:13,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:13" (1/1) ... [2020-11-07 06:35:13,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:13" (1/1) ... [2020-11-07 06:35:13,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:13" (1/1) ... [2020-11-07 06:35:13,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:35:13,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:35:13,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:35:13,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:35:13,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:35:14,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:35:14,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:35:14,019 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:35:14,020 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:35:14,020 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:35:14,020 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:35:14,020 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:35:14,021 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:35:14,021 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 06:35:14,021 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 06:35:14,021 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:35:14,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:35:14,022 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:35:14,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:35:14,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-07 06:35:14,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:35:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:35:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:35:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:35:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:35:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:35:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:35:14,659 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:35:14,659 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-07 06:35:14,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:14 BoogieIcfgContainer [2020-11-07 06:35:14,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:35:14,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:35:14,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:35:14,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:35:14,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:35:13" (1/3) ... [2020-11-07 06:35:14,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b1c0e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:14, skipping insertion in model container [2020-11-07 06:35:14,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:13" (2/3) ... [2020-11-07 06:35:14,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b1c0e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:14, skipping insertion in model container [2020-11-07 06:35:14,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:14" (3/3) ... [2020-11-07 06:35:14,671 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-11-07 06:35:14,688 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:35:14,692 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:35:14,705 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:35:14,729 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:35:14,729 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:35:14,730 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:35:14,730 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:35:14,730 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:35:14,730 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:35:14,730 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:35:14,730 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:35:14,751 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-11-07 06:35:14,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 06:35:14,762 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:14,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:14,764 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:14,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1931188946, now seen corresponding path program 1 times [2020-11-07 06:35:14,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:14,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460372682] [2020-11-07 06:35:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:15,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:15,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460372682] [2020-11-07 06:35:15,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:15,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:35:15,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665221703] [2020-11-07 06:35:15,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:35:15,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:15,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:35:15,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:35:15,079 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2020-11-07 06:35:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:15,571 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2020-11-07 06:35:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:35:15,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-11-07 06:35:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:15,584 INFO L225 Difference]: With dead ends: 200 [2020-11-07 06:35:15,584 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 06:35:15,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:35:15,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 06:35:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-11-07 06:35:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 06:35:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-11-07 06:35:15,668 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 43 [2020-11-07 06:35:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:15,669 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-11-07 06:35:15,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:35:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-11-07 06:35:15,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 06:35:15,671 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:15,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:15,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:35:15,672 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:15,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1726206385, now seen corresponding path program 1 times [2020-11-07 06:35:15,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:15,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165826513] [2020-11-07 06:35:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:15,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:15,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165826513] [2020-11-07 06:35:15,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:15,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 06:35:15,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950315204] [2020-11-07 06:35:15,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 06:35:15,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:15,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 06:35:15,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 06:35:15,823 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 4 states. [2020-11-07 06:35:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:16,173 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2020-11-07 06:35:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 06:35:16,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-11-07 06:35:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:16,176 INFO L225 Difference]: With dead ends: 152 [2020-11-07 06:35:16,176 INFO L226 Difference]: Without dead ends: 95 [2020-11-07 06:35:16,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 06:35:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-07 06:35:16,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2020-11-07 06:35:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-07 06:35:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2020-11-07 06:35:16,193 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 47 [2020-11-07 06:35:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:16,194 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2020-11-07 06:35:16,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 06:35:16,194 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2020-11-07 06:35:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-07 06:35:16,196 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:16,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:16,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:35:16,197 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:16,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:16,198 INFO L82 PathProgramCache]: Analyzing trace with hash 531359868, now seen corresponding path program 1 times [2020-11-07 06:35:16,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:16,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799619628] [2020-11-07 06:35:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:16,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 06:35:16,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799619628] [2020-11-07 06:35:16,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:16,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-07 06:35:16,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689309011] [2020-11-07 06:35:16,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:35:16,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:16,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:35:16,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:35:16,360 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 6 states. [2020-11-07 06:35:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:16,745 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2020-11-07 06:35:16,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:35:16,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-11-07 06:35:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:16,747 INFO L225 Difference]: With dead ends: 160 [2020-11-07 06:35:16,748 INFO L226 Difference]: Without dead ends: 102 [2020-11-07 06:35:16,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:16,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-07 06:35:16,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2020-11-07 06:35:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-07 06:35:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-11-07 06:35:16,763 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 61 [2020-11-07 06:35:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:16,763 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-11-07 06:35:16,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:35:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-11-07 06:35:16,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-07 06:35:16,766 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:16,766 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:16,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:35:16,767 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:16,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2109050272, now seen corresponding path program 2 times [2020-11-07 06:35:16,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:16,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220418957] [2020-11-07 06:35:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:16,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:16,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220418957] [2020-11-07 06:35:16,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:16,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-07 06:35:16,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757144320] [2020-11-07 06:35:16,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:35:16,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:16,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:35:16,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:35:16,949 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 6 states. [2020-11-07 06:35:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:17,270 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2020-11-07 06:35:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:35:17,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-11-07 06:35:17,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:17,272 INFO L225 Difference]: With dead ends: 150 [2020-11-07 06:35:17,272 INFO L226 Difference]: Without dead ends: 104 [2020-11-07 06:35:17,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-07 06:35:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2020-11-07 06:35:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-07 06:35:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2020-11-07 06:35:17,286 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 68 [2020-11-07 06:35:17,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:17,286 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2020-11-07 06:35:17,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:35:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2020-11-07 06:35:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-07 06:35:17,288 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:17,288 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:17,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:35:17,289 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:17,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1042508207, now seen corresponding path program 3 times [2020-11-07 06:35:17,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:17,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640549402] [2020-11-07 06:35:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:17,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:17,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640549402] [2020-11-07 06:35:17,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:17,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 06:35:17,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254045715] [2020-11-07 06:35:17,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:35:17,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:17,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:35:17,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:17,440 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 8 states. [2020-11-07 06:35:17,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:17,799 INFO L93 Difference]: Finished difference Result 176 states and 186 transitions. [2020-11-07 06:35:17,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 06:35:17,800 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-11-07 06:35:17,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:17,801 INFO L225 Difference]: With dead ends: 176 [2020-11-07 06:35:17,802 INFO L226 Difference]: Without dead ends: 111 [2020-11-07 06:35:17,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:17,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-07 06:35:17,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2020-11-07 06:35:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-07 06:35:17,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2020-11-07 06:35:17,827 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 75 [2020-11-07 06:35:17,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:17,828 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2020-11-07 06:35:17,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:35:17,828 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2020-11-07 06:35:17,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-07 06:35:17,835 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:17,835 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:17,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:35:17,836 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:17,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:17,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1786539125, now seen corresponding path program 4 times [2020-11-07 06:35:17,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:17,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987247040] [2020-11-07 06:35:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:18,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:18,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987247040] [2020-11-07 06:35:18,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:18,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:35:18,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437346384] [2020-11-07 06:35:18,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:35:18,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:18,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:35:18,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:18,073 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 10 states. [2020-11-07 06:35:18,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:18,446 INFO L93 Difference]: Finished difference Result 183 states and 193 transitions. [2020-11-07 06:35:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:35:18,447 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-11-07 06:35:18,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:18,449 INFO L225 Difference]: With dead ends: 183 [2020-11-07 06:35:18,449 INFO L226 Difference]: Without dead ends: 118 [2020-11-07 06:35:18,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:35:18,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-07 06:35:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-11-07 06:35:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-07 06:35:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2020-11-07 06:35:18,477 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 82 [2020-11-07 06:35:18,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:18,478 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2020-11-07 06:35:18,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:35:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2020-11-07 06:35:18,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-07 06:35:18,479 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:18,480 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:18,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:35:18,481 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:18,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:18,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2016028113, now seen corresponding path program 5 times [2020-11-07 06:35:18,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:18,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703785423] [2020-11-07 06:35:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:18,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:18,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703785423] [2020-11-07 06:35:18,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:18,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:35:18,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863546042] [2020-11-07 06:35:18,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:35:18,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:18,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:35:18,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:18,726 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand 12 states. [2020-11-07 06:35:19,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:19,154 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2020-11-07 06:35:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 06:35:19,155 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 89 [2020-11-07 06:35:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:19,157 INFO L225 Difference]: With dead ends: 185 [2020-11-07 06:35:19,158 INFO L226 Difference]: Without dead ends: 120 [2020-11-07 06:35:19,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:19,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-07 06:35:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-11-07 06:35:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-07 06:35:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-11-07 06:35:19,183 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 89 [2020-11-07 06:35:19,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:19,184 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-11-07 06:35:19,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:35:19,184 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-11-07 06:35:19,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-07 06:35:19,185 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:19,186 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:19,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:35:19,186 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:19,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:19,187 INFO L82 PathProgramCache]: Analyzing trace with hash 741764341, now seen corresponding path program 6 times [2020-11-07 06:35:19,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:19,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932894019] [2020-11-07 06:35:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:19,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-07 06:35:19,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932894019] [2020-11-07 06:35:19,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:19,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 06:35:19,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675599740] [2020-11-07 06:35:19,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:35:19,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:19,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:35:19,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:19,299 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 8 states. [2020-11-07 06:35:19,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:19,541 INFO L93 Difference]: Finished difference Result 178 states and 187 transitions. [2020-11-07 06:35:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 06:35:19,542 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-11-07 06:35:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:19,545 INFO L225 Difference]: With dead ends: 178 [2020-11-07 06:35:19,545 INFO L226 Difference]: Without dead ends: 132 [2020-11-07 06:35:19,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-11-07 06:35:19,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2020-11-07 06:35:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-07 06:35:19,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2020-11-07 06:35:19,566 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 96 [2020-11-07 06:35:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:19,566 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2020-11-07 06:35:19,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:35:19,567 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2020-11-07 06:35:19,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-07 06:35:19,571 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:19,572 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:19,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:35:19,572 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:19,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:19,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1731640668, now seen corresponding path program 7 times [2020-11-07 06:35:19,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:19,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460930916] [2020-11-07 06:35:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:19,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-07 06:35:19,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460930916] [2020-11-07 06:35:19,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:19,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:35:19,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931040984] [2020-11-07 06:35:19,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:35:19,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:19,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:35:19,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:19,767 INFO L87 Difference]: Start difference. First operand 127 states and 132 transitions. Second operand 10 states. [2020-11-07 06:35:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:20,123 INFO L93 Difference]: Finished difference Result 185 states and 194 transitions. [2020-11-07 06:35:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:35:20,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 103 [2020-11-07 06:35:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:20,126 INFO L225 Difference]: With dead ends: 185 [2020-11-07 06:35:20,127 INFO L226 Difference]: Without dead ends: 139 [2020-11-07 06:35:20,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:35:20,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-07 06:35:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2020-11-07 06:35:20,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-11-07 06:35:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 139 transitions. [2020-11-07 06:35:20,152 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 139 transitions. Word has length 103 [2020-11-07 06:35:20,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:20,153 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 139 transitions. [2020-11-07 06:35:20,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:35:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 139 transitions. [2020-11-07 06:35:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-11-07 06:35:20,162 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:20,166 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:20,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:35:20,167 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:20,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:20,168 INFO L82 PathProgramCache]: Analyzing trace with hash -170558699, now seen corresponding path program 8 times [2020-11-07 06:35:20,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:20,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360685529] [2020-11-07 06:35:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:20,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-07 06:35:20,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360685529] [2020-11-07 06:35:20,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:20,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:35:20,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161262898] [2020-11-07 06:35:20,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:35:20,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:20,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:35:20,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:20,377 INFO L87 Difference]: Start difference. First operand 134 states and 139 transitions. Second operand 12 states. [2020-11-07 06:35:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:20,788 INFO L93 Difference]: Finished difference Result 187 states and 196 transitions. [2020-11-07 06:35:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 06:35:20,789 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 110 [2020-11-07 06:35:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:20,790 INFO L225 Difference]: With dead ends: 187 [2020-11-07 06:35:20,790 INFO L226 Difference]: Without dead ends: 141 [2020-11-07 06:35:20,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-07 06:35:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-11-07 06:35:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-11-07 06:35:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2020-11-07 06:35:20,804 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 110 [2020-11-07 06:35:20,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:20,805 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2020-11-07 06:35:20,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:35:20,805 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2020-11-07 06:35:20,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-11-07 06:35:20,807 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:20,807 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:20,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 06:35:20,807 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:20,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:20,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1454273732, now seen corresponding path program 9 times [2020-11-07 06:35:20,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:20,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413077691] [2020-11-07 06:35:20,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:20,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-11-07 06:35:20,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413077691] [2020-11-07 06:35:20,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:20,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 06:35:20,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700071947] [2020-11-07 06:35:20,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:35:20,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:20,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:35:20,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:20,996 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand 8 states. [2020-11-07 06:35:21,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:21,265 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2020-11-07 06:35:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 06:35:21,266 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 117 [2020-11-07 06:35:21,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:21,267 INFO L225 Difference]: With dead ends: 179 [2020-11-07 06:35:21,267 INFO L226 Difference]: Without dead ends: 146 [2020-11-07 06:35:21,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:35:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-07 06:35:21,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-11-07 06:35:21,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-11-07 06:35:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 148 transitions. [2020-11-07 06:35:21,279 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 148 transitions. Word has length 117 [2020-11-07 06:35:21,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:21,279 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 148 transitions. [2020-11-07 06:35:21,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:35:21,279 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 148 transitions. [2020-11-07 06:35:21,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-11-07 06:35:21,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:21,281 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:21,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 06:35:21,281 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:21,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:21,282 INFO L82 PathProgramCache]: Analyzing trace with hash -799740924, now seen corresponding path program 1 times [2020-11-07 06:35:21,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:21,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316950756] [2020-11-07 06:35:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:21,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-11-07 06:35:21,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316950756] [2020-11-07 06:35:21,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:21,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:35:21,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20369936] [2020-11-07 06:35:21,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:35:21,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:21,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:35:21,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:21,447 INFO L87 Difference]: Start difference. First operand 143 states and 148 transitions. Second operand 10 states. [2020-11-07 06:35:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:21,881 INFO L93 Difference]: Finished difference Result 183 states and 191 transitions. [2020-11-07 06:35:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:35:21,882 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 123 [2020-11-07 06:35:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:21,885 INFO L225 Difference]: With dead ends: 183 [2020-11-07 06:35:21,885 INFO L226 Difference]: Without dead ends: 175 [2020-11-07 06:35:21,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:35:21,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-11-07 06:35:21,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2020-11-07 06:35:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-11-07 06:35:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 178 transitions. [2020-11-07 06:35:21,903 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 178 transitions. Word has length 123 [2020-11-07 06:35:21,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:21,904 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 178 transitions. [2020-11-07 06:35:21,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:35:21,904 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 178 transitions. [2020-11-07 06:35:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-11-07 06:35:21,909 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:21,909 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:21,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 06:35:21,910 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:21,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:21,910 INFO L82 PathProgramCache]: Analyzing trace with hash 321820364, now seen corresponding path program 2 times [2020-11-07 06:35:21,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:21,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751418723] [2020-11-07 06:35:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:22,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-11-07 06:35:22,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751418723] [2020-11-07 06:35:22,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:22,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:35:22,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280383639] [2020-11-07 06:35:22,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:35:22,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:22,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:35:22,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:22,167 INFO L87 Difference]: Start difference. First operand 170 states and 178 transitions. Second operand 12 states. [2020-11-07 06:35:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:22,767 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2020-11-07 06:35:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 06:35:22,768 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 129 [2020-11-07 06:35:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:22,770 INFO L225 Difference]: With dead ends: 184 [2020-11-07 06:35:22,770 INFO L226 Difference]: Without dead ends: 176 [2020-11-07 06:35:22,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-11-07 06:35:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-11-07 06:35:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 144. [2020-11-07 06:35:22,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-07 06:35:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-11-07 06:35:22,787 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 129 [2020-11-07 06:35:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:22,787 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-11-07 06:35:22,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:35:22,787 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-11-07 06:35:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 06:35:22,789 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:22,789 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:22,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 06:35:22,790 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:22,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1541151436, now seen corresponding path program 1 times [2020-11-07 06:35:22,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:22,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917378933] [2020-11-07 06:35:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:22,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-11-07 06:35:22,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917378933] [2020-11-07 06:35:22,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:22,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 06:35:22,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102712121] [2020-11-07 06:35:22,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:35:22,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:22,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:35:22,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:35:22,919 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 6 states. [2020-11-07 06:35:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:23,096 INFO L93 Difference]: Finished difference Result 189 states and 197 transitions. [2020-11-07 06:35:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:35:23,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2020-11-07 06:35:23,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:23,098 INFO L225 Difference]: With dead ends: 189 [2020-11-07 06:35:23,098 INFO L226 Difference]: Without dead ends: 149 [2020-11-07 06:35:23,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:35:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-07 06:35:23,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-11-07 06:35:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-11-07 06:35:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2020-11-07 06:35:23,115 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 135 [2020-11-07 06:35:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:23,116 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2020-11-07 06:35:23,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:35:23,116 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2020-11-07 06:35:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-07 06:35:23,117 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:23,118 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:23,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 06:35:23,118 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:23,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:23,119 INFO L82 PathProgramCache]: Analyzing trace with hash -307444684, now seen corresponding path program 1 times [2020-11-07 06:35:23,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:23,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564168183] [2020-11-07 06:35:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-11-07 06:35:23,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564168183] [2020-11-07 06:35:23,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:23,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:35:23,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982912222] [2020-11-07 06:35:23,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:35:23,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:23,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:35:23,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:23,335 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand 12 states. [2020-11-07 06:35:23,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:23,731 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2020-11-07 06:35:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 06:35:23,732 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 141 [2020-11-07 06:35:23,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:23,733 INFO L225 Difference]: With dead ends: 205 [2020-11-07 06:35:23,734 INFO L226 Difference]: Without dead ends: 155 [2020-11-07 06:35:23,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-07 06:35:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-11-07 06:35:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-07 06:35:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 157 transitions. [2020-11-07 06:35:23,749 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 157 transitions. Word has length 141 [2020-11-07 06:35:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:23,750 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 157 transitions. [2020-11-07 06:35:23,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:35:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 157 transitions. [2020-11-07 06:35:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-11-07 06:35:23,752 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:23,752 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:23,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 06:35:23,752 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:23,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:23,753 INFO L82 PathProgramCache]: Analyzing trace with hash -363211524, now seen corresponding path program 2 times [2020-11-07 06:35:23,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:23,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307631041] [2020-11-07 06:35:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-11-07 06:35:23,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307631041] [2020-11-07 06:35:23,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:23,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:35:23,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012020872] [2020-11-07 06:35:23,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:35:23,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:23,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:35:23,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:35:23,957 INFO L87 Difference]: Start difference. First operand 152 states and 157 transitions. Second operand 14 states. [2020-11-07 06:35:24,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:24,573 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2020-11-07 06:35:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 06:35:24,574 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 147 [2020-11-07 06:35:24,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:24,576 INFO L225 Difference]: With dead ends: 179 [2020-11-07 06:35:24,576 INFO L226 Difference]: Without dead ends: 171 [2020-11-07 06:35:24,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2020-11-07 06:35:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-07 06:35:24,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 164. [2020-11-07 06:35:24,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-11-07 06:35:24,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 170 transitions. [2020-11-07 06:35:24,598 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 170 transitions. Word has length 147 [2020-11-07 06:35:24,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:24,598 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 170 transitions. [2020-11-07 06:35:24,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:35:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 170 transitions. [2020-11-07 06:35:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-11-07 06:35:24,601 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:24,601 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:24,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 06:35:24,601 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:24,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1555255236, now seen corresponding path program 3 times [2020-11-07 06:35:24,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:24,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343866743] [2020-11-07 06:35:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:24,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-11-07 06:35:24,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343866743] [2020-11-07 06:35:24,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:24,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:35:24,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332745054] [2020-11-07 06:35:24,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:35:24,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:24,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:35:24,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:24,767 INFO L87 Difference]: Start difference. First operand 164 states and 170 transitions. Second operand 10 states. [2020-11-07 06:35:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:25,097 INFO L93 Difference]: Finished difference Result 248 states and 259 transitions. [2020-11-07 06:35:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:35:25,097 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 159 [2020-11-07 06:35:25,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:25,099 INFO L225 Difference]: With dead ends: 248 [2020-11-07 06:35:25,099 INFO L226 Difference]: Without dead ends: 173 [2020-11-07 06:35:25,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-07 06:35:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-07 06:35:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2020-11-07 06:35:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-11-07 06:35:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 176 transitions. [2020-11-07 06:35:25,117 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 176 transitions. Word has length 159 [2020-11-07 06:35:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:25,117 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 176 transitions. [2020-11-07 06:35:25,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:35:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 176 transitions. [2020-11-07 06:35:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 06:35:25,119 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:25,119 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:25,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 06:35:25,120 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:25,120 INFO L82 PathProgramCache]: Analyzing trace with hash 351813932, now seen corresponding path program 4 times [2020-11-07 06:35:25,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:25,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264194613] [2020-11-07 06:35:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:25,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-11-07 06:35:25,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264194613] [2020-11-07 06:35:25,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:25,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:35:25,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198293598] [2020-11-07 06:35:25,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:35:25,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:25,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:35:25,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:35:25,390 INFO L87 Difference]: Start difference. First operand 170 states and 176 transitions. Second operand 16 states. [2020-11-07 06:35:26,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:26,037 INFO L93 Difference]: Finished difference Result 257 states and 269 transitions. [2020-11-07 06:35:26,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 06:35:26,038 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 165 [2020-11-07 06:35:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:26,039 INFO L225 Difference]: With dead ends: 257 [2020-11-07 06:35:26,039 INFO L226 Difference]: Without dead ends: 179 [2020-11-07 06:35:26,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-11-07 06:35:26,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-07 06:35:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2020-11-07 06:35:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-11-07 06:35:26,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 182 transitions. [2020-11-07 06:35:26,058 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 182 transitions. Word has length 165 [2020-11-07 06:35:26,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:26,058 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 182 transitions. [2020-11-07 06:35:26,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:35:26,059 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 182 transitions. [2020-11-07 06:35:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-11-07 06:35:26,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:26,061 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:26,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 06:35:26,061 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:26,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:26,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1810694644, now seen corresponding path program 5 times [2020-11-07 06:35:26,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:26,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631012758] [2020-11-07 06:35:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:26,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-11-07 06:35:26,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631012758] [2020-11-07 06:35:26,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:26,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:35:26,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392033291] [2020-11-07 06:35:26,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:35:26,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:26,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:35:26,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:35:26,403 INFO L87 Difference]: Start difference. First operand 176 states and 182 transitions. Second operand 18 states. [2020-11-07 06:35:27,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:27,159 INFO L93 Difference]: Finished difference Result 207 states and 214 transitions. [2020-11-07 06:35:27,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 06:35:27,160 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 171 [2020-11-07 06:35:27,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:27,162 INFO L225 Difference]: With dead ends: 207 [2020-11-07 06:35:27,163 INFO L226 Difference]: Without dead ends: 199 [2020-11-07 06:35:27,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 06:35:27,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-07 06:35:27,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 188. [2020-11-07 06:35:27,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-11-07 06:35:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 195 transitions. [2020-11-07 06:35:27,182 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 195 transitions. Word has length 171 [2020-11-07 06:35:27,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:27,183 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 195 transitions. [2020-11-07 06:35:27,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:35:27,183 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 195 transitions. [2020-11-07 06:35:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-11-07 06:35:27,185 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:27,186 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:27,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 06:35:27,186 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:27,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1378694980, now seen corresponding path program 6 times [2020-11-07 06:35:27,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:27,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874600336] [2020-11-07 06:35:27,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:27,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-11-07 06:35:27,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874600336] [2020-11-07 06:35:27,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:27,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:35:27,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359118141] [2020-11-07 06:35:27,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:35:27,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:27,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:35:27,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:35:27,430 INFO L87 Difference]: Start difference. First operand 188 states and 195 transitions. Second operand 14 states. [2020-11-07 06:35:28,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:28,079 INFO L93 Difference]: Finished difference Result 369 states and 388 transitions. [2020-11-07 06:35:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 06:35:28,080 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 183 [2020-11-07 06:35:28,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:28,083 INFO L225 Difference]: With dead ends: 369 [2020-11-07 06:35:28,083 INFO L226 Difference]: Without dead ends: 289 [2020-11-07 06:35:28,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-11-07 06:35:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-11-07 06:35:28,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 236. [2020-11-07 06:35:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-11-07 06:35:28,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 245 transitions. [2020-11-07 06:35:28,112 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 245 transitions. Word has length 183 [2020-11-07 06:35:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:28,112 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 245 transitions. [2020-11-07 06:35:28,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:35:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 245 transitions. [2020-11-07 06:35:28,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-11-07 06:35:28,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:28,116 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:28,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 06:35:28,116 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:28,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:28,117 INFO L82 PathProgramCache]: Analyzing trace with hash 104071716, now seen corresponding path program 7 times [2020-11-07 06:35:28,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:28,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436272127] [2020-11-07 06:35:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:28,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 16 proven. 47 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-11-07 06:35:28,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436272127] [2020-11-07 06:35:28,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:28,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-07 06:35:28,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298503676] [2020-11-07 06:35:28,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 06:35:28,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:28,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 06:35:28,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:28,468 INFO L87 Difference]: Start difference. First operand 236 states and 245 transitions. Second operand 20 states. [2020-11-07 06:35:29,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:29,314 INFO L93 Difference]: Finished difference Result 380 states and 398 transitions. [2020-11-07 06:35:29,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-07 06:35:29,314 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 189 [2020-11-07 06:35:29,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:29,316 INFO L225 Difference]: With dead ends: 380 [2020-11-07 06:35:29,317 INFO L226 Difference]: Without dead ends: 254 [2020-11-07 06:35:29,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 06:35:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-11-07 06:35:29,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2020-11-07 06:35:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-11-07 06:35:29,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 257 transitions. [2020-11-07 06:35:29,341 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 257 transitions. Word has length 189 [2020-11-07 06:35:29,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:29,342 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 257 transitions. [2020-11-07 06:35:29,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 06:35:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 257 transitions. [2020-11-07 06:35:29,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-11-07 06:35:29,345 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:29,345 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:29,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 06:35:29,345 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:29,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:29,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1299287316, now seen corresponding path program 8 times [2020-11-07 06:35:29,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:29,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402051909] [2020-11-07 06:35:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:29,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-11-07 06:35:29,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402051909] [2020-11-07 06:35:29,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:29,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-07 06:35:29,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648329632] [2020-11-07 06:35:29,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 06:35:29,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:29,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 06:35:29,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-11-07 06:35:29,736 INFO L87 Difference]: Start difference. First operand 248 states and 257 transitions. Second operand 22 states. [2020-11-07 06:35:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:30,740 INFO L93 Difference]: Finished difference Result 286 states and 296 transitions. [2020-11-07 06:35:30,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 06:35:30,743 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-11-07 06:35:30,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:30,746 INFO L225 Difference]: With dead ends: 286 [2020-11-07 06:35:30,746 INFO L226 Difference]: Without dead ends: 278 [2020-11-07 06:35:30,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 06:35:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-11-07 06:35:30,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 260. [2020-11-07 06:35:30,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-11-07 06:35:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 270 transitions. [2020-11-07 06:35:30,770 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 270 transitions. Word has length 195 [2020-11-07 06:35:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:30,771 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 270 transitions. [2020-11-07 06:35:30,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 06:35:30,771 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 270 transitions. [2020-11-07 06:35:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-11-07 06:35:30,774 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:30,774 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:30,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 06:35:30,774 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:30,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:30,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1824163252, now seen corresponding path program 9 times [2020-11-07 06:35:30,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:30,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594674175] [2020-11-07 06:35:30,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:31,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 59 proven. 41 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-11-07 06:35:31,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594674175] [2020-11-07 06:35:31,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:31,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:35:31,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987151355] [2020-11-07 06:35:31,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:35:31,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:31,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:35:31,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:35:31,111 INFO L87 Difference]: Start difference. First operand 260 states and 270 transitions. Second operand 18 states. [2020-11-07 06:35:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:32,419 INFO L93 Difference]: Finished difference Result 577 states and 609 transitions. [2020-11-07 06:35:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-07 06:35:32,420 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 207 [2020-11-07 06:35:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:32,424 INFO L225 Difference]: With dead ends: 577 [2020-11-07 06:35:32,424 INFO L226 Difference]: Without dead ends: 476 [2020-11-07 06:35:32,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=346, Invalid=1816, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 06:35:32,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-11-07 06:35:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 318. [2020-11-07 06:35:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-07 06:35:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 332 transitions. [2020-11-07 06:35:32,461 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 332 transitions. Word has length 207 [2020-11-07 06:35:32,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:32,462 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 332 transitions. [2020-11-07 06:35:32,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:35:32,462 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 332 transitions. [2020-11-07 06:35:32,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-11-07 06:35:32,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:32,465 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:32,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 06:35:32,466 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:32,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:32,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1725957916, now seen corresponding path program 10 times [2020-11-07 06:35:32,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:32,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591760997] [2020-11-07 06:35:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:32,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-11-07 06:35:32,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591760997] [2020-11-07 06:35:32,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:32,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-11-07 06:35:32,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823170345] [2020-11-07 06:35:32,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 06:35:32,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:32,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 06:35:32,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-11-07 06:35:32,915 INFO L87 Difference]: Start difference. First operand 318 states and 332 transitions. Second operand 24 states. [2020-11-07 06:35:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:34,185 INFO L93 Difference]: Finished difference Result 535 states and 563 transitions. [2020-11-07 06:35:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-07 06:35:34,194 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 213 [2020-11-07 06:35:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:34,196 INFO L225 Difference]: With dead ends: 535 [2020-11-07 06:35:34,196 INFO L226 Difference]: Without dead ends: 345 [2020-11-07 06:35:34,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=1866, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 06:35:34,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-11-07 06:35:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 336. [2020-11-07 06:35:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-11-07 06:35:34,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 350 transitions. [2020-11-07 06:35:34,231 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 350 transitions. Word has length 213 [2020-11-07 06:35:34,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:34,232 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 350 transitions. [2020-11-07 06:35:34,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 06:35:34,232 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 350 transitions. [2020-11-07 06:35:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-11-07 06:35:34,233 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:34,234 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:34,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 06:35:34,234 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:34,235 INFO L82 PathProgramCache]: Analyzing trace with hash 977151972, now seen corresponding path program 11 times [2020-11-07 06:35:34,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:34,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127457770] [2020-11-07 06:35:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:34,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 48 proven. 98 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-11-07 06:35:34,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127457770] [2020-11-07 06:35:34,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:34,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-11-07 06:35:34,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145690612] [2020-11-07 06:35:34,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 06:35:34,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:34,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 06:35:34,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-11-07 06:35:34,739 INFO L87 Difference]: Start difference. First operand 336 states and 350 transitions. Second operand 26 states. [2020-11-07 06:35:36,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:36,087 INFO L93 Difference]: Finished difference Result 393 states and 408 transitions. [2020-11-07 06:35:36,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 06:35:36,088 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 219 [2020-11-07 06:35:36,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:36,091 INFO L225 Difference]: With dead ends: 393 [2020-11-07 06:35:36,091 INFO L226 Difference]: Without dead ends: 385 [2020-11-07 06:35:36,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=567, Invalid=2625, Unknown=0, NotChecked=0, Total=3192 [2020-11-07 06:35:36,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-11-07 06:35:36,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 348. [2020-11-07 06:35:36,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-11-07 06:35:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 363 transitions. [2020-11-07 06:35:36,130 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 363 transitions. Word has length 219 [2020-11-07 06:35:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:36,131 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 363 transitions. [2020-11-07 06:35:36,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 06:35:36,131 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 363 transitions. [2020-11-07 06:35:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-11-07 06:35:36,133 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:36,133 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:36,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 06:35:36,134 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:36,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:36,134 INFO L82 PathProgramCache]: Analyzing trace with hash 359302828, now seen corresponding path program 12 times [2020-11-07 06:35:36,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:36,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540453540] [2020-11-07 06:35:36,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:36,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 100 proven. 69 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-11-07 06:35:36,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540453540] [2020-11-07 06:35:36,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:36,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-07 06:35:36,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602689895] [2020-11-07 06:35:36,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 06:35:36,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:36,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 06:35:36,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-11-07 06:35:36,519 INFO L87 Difference]: Start difference. First operand 348 states and 363 transitions. Second operand 22 states. [2020-11-07 06:35:38,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:38,401 INFO L93 Difference]: Finished difference Result 863 states and 913 transitions. [2020-11-07 06:35:38,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-07 06:35:38,402 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2020-11-07 06:35:38,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:38,407 INFO L225 Difference]: With dead ends: 863 [2020-11-07 06:35:38,407 INFO L226 Difference]: Without dead ends: 741 [2020-11-07 06:35:38,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 06:35:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-11-07 06:35:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 412. [2020-11-07 06:35:38,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-11-07 06:35:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 431 transitions. [2020-11-07 06:35:38,463 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 431 transitions. Word has length 231 [2020-11-07 06:35:38,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:38,463 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 431 transitions. [2020-11-07 06:35:38,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 06:35:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 431 transitions. [2020-11-07 06:35:38,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-11-07 06:35:38,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:38,466 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:38,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 06:35:38,466 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:38,469 INFO L82 PathProgramCache]: Analyzing trace with hash 989614100, now seen corresponding path program 13 times [2020-11-07 06:35:38,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:38,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467876917] [2020-11-07 06:35:38,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:41,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 37 proven. 231 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-11-07 06:35:41,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467876917] [2020-11-07 06:35:41,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:41,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-11-07 06:35:41,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21077643] [2020-11-07 06:35:41,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-07 06:35:41,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:41,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-07 06:35:41,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1886, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 06:35:41,918 INFO L87 Difference]: Start difference. First operand 412 states and 431 transitions. Second operand 46 states. [2020-11-07 06:35:51,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:51,156 INFO L93 Difference]: Finished difference Result 849 states and 901 transitions. [2020-11-07 06:35:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-07 06:35:51,156 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 237 [2020-11-07 06:35:51,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:51,162 INFO L225 Difference]: With dead ends: 849 [2020-11-07 06:35:51,163 INFO L226 Difference]: Without dead ends: 776 [2020-11-07 06:35:51,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=753, Invalid=10803, Unknown=0, NotChecked=0, Total=11556 [2020-11-07 06:35:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2020-11-07 06:35:51,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 428. [2020-11-07 06:35:51,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-11-07 06:35:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 449 transitions. [2020-11-07 06:35:51,240 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 449 transitions. Word has length 237 [2020-11-07 06:35:51,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:51,241 INFO L481 AbstractCegarLoop]: Abstraction has 428 states and 449 transitions. [2020-11-07 06:35:51,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-07 06:35:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 449 transitions. [2020-11-07 06:35:51,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-11-07 06:35:51,243 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:51,243 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:51,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 06:35:51,244 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:51,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1517921228, now seen corresponding path program 1 times [2020-11-07 06:35:51,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:51,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478780847] [2020-11-07 06:35:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 141 proven. 80 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-11-07 06:35:51,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478780847] [2020-11-07 06:35:51,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:51,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-11-07 06:35:51,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389451554] [2020-11-07 06:35:51,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 06:35:51,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:51,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 06:35:51,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-11-07 06:35:51,738 INFO L87 Difference]: Start difference. First operand 428 states and 449 transitions. Second operand 23 states. [2020-11-07 06:35:52,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:52,690 INFO L93 Difference]: Finished difference Result 539 states and 566 transitions. [2020-11-07 06:35:52,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 06:35:52,690 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 239 [2020-11-07 06:35:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:52,694 INFO L225 Difference]: With dead ends: 539 [2020-11-07 06:35:52,694 INFO L226 Difference]: Without dead ends: 390 [2020-11-07 06:35:52,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:35:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-11-07 06:35:52,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2020-11-07 06:35:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-11-07 06:35:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 409 transitions. [2020-11-07 06:35:52,763 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 409 transitions. Word has length 239 [2020-11-07 06:35:52,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:52,764 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 409 transitions. [2020-11-07 06:35:52,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 06:35:52,764 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 409 transitions. [2020-11-07 06:35:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-11-07 06:35:52,767 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:52,767 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:52,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 06:35:52,767 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:52,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:52,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1593033316, now seen corresponding path program 2 times [2020-11-07 06:35:52,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:52,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042663774] [2020-11-07 06:35:52,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:53,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 141 proven. 94 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-11-07 06:35:53,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042663774] [2020-11-07 06:35:53,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:53,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-11-07 06:35:53,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971743796] [2020-11-07 06:35:53,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 06:35:53,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:53,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 06:35:53,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:35:53,286 INFO L87 Difference]: Start difference. First operand 390 states and 409 transitions. Second operand 25 states. [2020-11-07 06:35:54,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:54,961 INFO L93 Difference]: Finished difference Result 639 states and 674 transitions. [2020-11-07 06:35:54,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 06:35:54,962 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 245 [2020-11-07 06:35:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:54,966 INFO L225 Difference]: With dead ends: 639 [2020-11-07 06:35:54,966 INFO L226 Difference]: Without dead ends: 492 [2020-11-07 06:35:54,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=447, Invalid=2633, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 06:35:54,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-11-07 06:35:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 402. [2020-11-07 06:35:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-11-07 06:35:55,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 421 transitions. [2020-11-07 06:35:55,038 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 421 transitions. Word has length 245 [2020-11-07 06:35:55,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:55,038 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 421 transitions. [2020-11-07 06:35:55,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 06:35:55,039 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 421 transitions. [2020-11-07 06:35:55,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-11-07 06:35:55,040 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:55,041 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:55,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 06:35:55,041 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:55,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1763846052, now seen corresponding path program 3 times [2020-11-07 06:35:55,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:55,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62281832] [2020-11-07 06:35:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:55,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 129 proven. 87 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-11-07 06:35:55,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62281832] [2020-11-07 06:35:55,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:55,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-11-07 06:35:55,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118843538] [2020-11-07 06:35:55,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 06:35:55,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:55,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 06:35:55,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:35:55,557 INFO L87 Difference]: Start difference. First operand 402 states and 421 transitions. Second operand 25 states. [2020-11-07 06:35:58,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:58,274 INFO L93 Difference]: Finished difference Result 1019 states and 1079 transitions. [2020-11-07 06:35:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-07 06:35:58,278 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 245 [2020-11-07 06:35:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:58,282 INFO L225 Difference]: With dead ends: 1019 [2020-11-07 06:35:58,282 INFO L226 Difference]: Without dead ends: 897 [2020-11-07 06:35:58,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1070, Invalid=6070, Unknown=0, NotChecked=0, Total=7140 [2020-11-07 06:35:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-11-07 06:35:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 454. [2020-11-07 06:35:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-11-07 06:35:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 476 transitions. [2020-11-07 06:35:58,380 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 476 transitions. Word has length 245 [2020-11-07 06:35:58,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:58,381 INFO L481 AbstractCegarLoop]: Abstraction has 454 states and 476 transitions. [2020-11-07 06:35:58,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 06:35:58,381 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 476 transitions. [2020-11-07 06:35:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-11-07 06:35:58,383 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:58,384 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:58,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 06:35:58,384 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:58,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:58,385 INFO L82 PathProgramCache]: Analyzing trace with hash -59936508, now seen corresponding path program 4 times [2020-11-07 06:35:58,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:58,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693548148] [2020-11-07 06:35:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:58,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 141 proven. 114 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-11-07 06:35:58,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693548148] [2020-11-07 06:35:58,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:58,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-11-07 06:35:58,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93857600] [2020-11-07 06:35:58,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 06:35:58,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:58,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 06:35:58,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-11-07 06:35:58,941 INFO L87 Difference]: Start difference. First operand 454 states and 476 transitions. Second operand 27 states. [2020-11-07 06:36:01,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:01,864 INFO L93 Difference]: Finished difference Result 876 states and 926 transitions. [2020-11-07 06:36:01,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-11-07 06:36:01,865 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 251 [2020-11-07 06:36:01,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:01,870 INFO L225 Difference]: With dead ends: 876 [2020-11-07 06:36:01,870 INFO L226 Difference]: Without dead ends: 763 [2020-11-07 06:36:01,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=901, Invalid=5741, Unknown=0, NotChecked=0, Total=6642 [2020-11-07 06:36:01,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2020-11-07 06:36:01,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 510. [2020-11-07 06:36:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2020-11-07 06:36:01,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 536 transitions. [2020-11-07 06:36:01,996 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 536 transitions. Word has length 251 [2020-11-07 06:36:01,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:01,997 INFO L481 AbstractCegarLoop]: Abstraction has 510 states and 536 transitions. [2020-11-07 06:36:01,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 06:36:01,997 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 536 transitions. [2020-11-07 06:36:01,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-11-07 06:36:01,999 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:01,999 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:01,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 06:36:02,000 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:02,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:02,000 INFO L82 PathProgramCache]: Analyzing trace with hash -998024436, now seen corresponding path program 5 times [2020-11-07 06:36:02,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:02,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30017751] [2020-11-07 06:36:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:02,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 75 proven. 97 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2020-11-07 06:36:02,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30017751] [2020-11-07 06:36:02,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:02,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-11-07 06:36:02,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698657390] [2020-11-07 06:36:02,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 06:36:02,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:02,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 06:36:02,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2020-11-07 06:36:02,509 INFO L87 Difference]: Start difference. First operand 510 states and 536 transitions. Second operand 27 states. [2020-11-07 06:36:04,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:04,985 INFO L93 Difference]: Finished difference Result 943 states and 1001 transitions. [2020-11-07 06:36:04,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-07 06:36:04,985 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 251 [2020-11-07 06:36:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:04,989 INFO L225 Difference]: With dead ends: 943 [2020-11-07 06:36:04,989 INFO L226 Difference]: Without dead ends: 814 [2020-11-07 06:36:04,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1406, Invalid=5566, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 06:36:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-11-07 06:36:05,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 516. [2020-11-07 06:36:05,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-11-07 06:36:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 542 transitions. [2020-11-07 06:36:05,112 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 542 transitions. Word has length 251 [2020-11-07 06:36:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:05,113 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 542 transitions. [2020-11-07 06:36:05,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 06:36:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 542 transitions. [2020-11-07 06:36:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-11-07 06:36:05,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:05,115 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:05,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 06:36:05,115 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:05,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1573214308, now seen corresponding path program 6 times [2020-11-07 06:36:05,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:05,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112630024] [2020-11-07 06:36:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:05,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 153 proven. 154 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-11-07 06:36:05,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112630024] [2020-11-07 06:36:05,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:05,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-11-07 06:36:05,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522868959] [2020-11-07 06:36:05,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 06:36:05,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:05,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 06:36:05,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2020-11-07 06:36:05,685 INFO L87 Difference]: Start difference. First operand 516 states and 542 transitions. Second operand 28 states. [2020-11-07 06:36:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:07,743 INFO L93 Difference]: Finished difference Result 660 states and 694 transitions. [2020-11-07 06:36:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 06:36:07,744 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 257 [2020-11-07 06:36:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:07,747 INFO L225 Difference]: With dead ends: 660 [2020-11-07 06:36:07,747 INFO L226 Difference]: Without dead ends: 466 [2020-11-07 06:36:07,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=597, Invalid=3435, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 06:36:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-11-07 06:36:07,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 466. [2020-11-07 06:36:07,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-11-07 06:36:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 490 transitions. [2020-11-07 06:36:07,865 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 490 transitions. Word has length 257 [2020-11-07 06:36:07,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:07,865 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 490 transitions. [2020-11-07 06:36:07,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 06:36:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 490 transitions. [2020-11-07 06:36:07,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-11-07 06:36:07,867 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:07,868 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:07,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 06:36:07,868 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:07,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:07,868 INFO L82 PathProgramCache]: Analyzing trace with hash -429623700, now seen corresponding path program 7 times [2020-11-07 06:36:07,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:07,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40863282] [2020-11-07 06:36:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:08,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 141 proven. 140 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-11-07 06:36:08,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40863282] [2020-11-07 06:36:08,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:08,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-11-07 06:36:08,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832120003] [2020-11-07 06:36:08,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 06:36:08,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:08,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 06:36:08,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2020-11-07 06:36:08,566 INFO L87 Difference]: Start difference. First operand 466 states and 490 transitions. Second operand 29 states. [2020-11-07 06:36:12,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:12,640 INFO L93 Difference]: Finished difference Result 1031 states and 1090 transitions. [2020-11-07 06:36:12,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-11-07 06:36:12,641 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 257 [2020-11-07 06:36:12,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:12,645 INFO L225 Difference]: With dead ends: 1031 [2020-11-07 06:36:12,645 INFO L226 Difference]: Without dead ends: 909 [2020-11-07 06:36:12,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4377 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1825, Invalid=11515, Unknown=0, NotChecked=0, Total=13340 [2020-11-07 06:36:12,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2020-11-07 06:36:12,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 514. [2020-11-07 06:36:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-11-07 06:36:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 541 transitions. [2020-11-07 06:36:12,802 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 541 transitions. Word has length 257 [2020-11-07 06:36:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:12,803 INFO L481 AbstractCegarLoop]: Abstraction has 514 states and 541 transitions. [2020-11-07 06:36:12,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 06:36:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 541 transitions. [2020-11-07 06:36:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-11-07 06:36:12,805 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:12,805 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:12,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 06:36:12,806 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:12,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:12,806 INFO L82 PathProgramCache]: Analyzing trace with hash -700467756, now seen corresponding path program 8 times [2020-11-07 06:36:12,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:12,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119476646] [2020-11-07 06:36:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:13,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 79 proven. 169 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-11-07 06:36:13,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119476646] [2020-11-07 06:36:13,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:13,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-11-07 06:36:13,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684914264] [2020-11-07 06:36:13,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 06:36:13,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:13,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 06:36:13,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2020-11-07 06:36:13,490 INFO L87 Difference]: Start difference. First operand 514 states and 541 transitions. Second operand 31 states. [2020-11-07 06:36:15,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:15,984 INFO L93 Difference]: Finished difference Result 751 states and 794 transitions. [2020-11-07 06:36:15,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-07 06:36:15,985 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 257 [2020-11-07 06:36:15,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:15,990 INFO L225 Difference]: With dead ends: 751 [2020-11-07 06:36:15,990 INFO L226 Difference]: Without dead ends: 743 [2020-11-07 06:36:15,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=920, Invalid=4192, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 06:36:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-11-07 06:36:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 627. [2020-11-07 06:36:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2020-11-07 06:36:16,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 663 transitions. [2020-11-07 06:36:16,200 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 663 transitions. Word has length 257 [2020-11-07 06:36:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:16,200 INFO L481 AbstractCegarLoop]: Abstraction has 627 states and 663 transitions. [2020-11-07 06:36:16,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 06:36:16,201 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 663 transitions. [2020-11-07 06:36:16,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-11-07 06:36:16,203 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:16,203 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:16,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 06:36:16,203 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:16,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1356025908, now seen corresponding path program 9 times [2020-11-07 06:36:16,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:16,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821094164] [2020-11-07 06:36:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:16,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 153 proven. 174 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-11-07 06:36:16,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821094164] [2020-11-07 06:36:16,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:16,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-11-07 06:36:16,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212921118] [2020-11-07 06:36:16,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-07 06:36:16,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:16,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-07 06:36:16,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2020-11-07 06:36:16,868 INFO L87 Difference]: Start difference. First operand 627 states and 663 transitions. Second operand 30 states. [2020-11-07 06:36:19,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:19,833 INFO L93 Difference]: Finished difference Result 935 states and 987 transitions. [2020-11-07 06:36:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-07 06:36:19,834 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 263 [2020-11-07 06:36:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:19,838 INFO L225 Difference]: With dead ends: 935 [2020-11-07 06:36:19,838 INFO L226 Difference]: Without dead ends: 533 [2020-11-07 06:36:19,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=970, Invalid=5510, Unknown=0, NotChecked=0, Total=6480 [2020-11-07 06:36:19,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-11-07 06:36:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2020-11-07 06:36:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-11-07 06:36:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 563 transitions. [2020-11-07 06:36:19,979 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 563 transitions. Word has length 263 [2020-11-07 06:36:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:19,980 INFO L481 AbstractCegarLoop]: Abstraction has 533 states and 563 transitions. [2020-11-07 06:36:19,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-07 06:36:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 563 transitions. [2020-11-07 06:36:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-11-07 06:36:19,982 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:19,982 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:19,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 06:36:19,983 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:19,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:19,983 INFO L82 PathProgramCache]: Analyzing trace with hash -755050188, now seen corresponding path program 10 times [2020-11-07 06:36:19,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:19,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888032451] [2020-11-07 06:36:19,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:20,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 153 proven. 200 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-11-07 06:36:20,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888032451] [2020-11-07 06:36:20,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:20,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-11-07 06:36:20,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271975364] [2020-11-07 06:36:20,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 06:36:20,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 06:36:20,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2020-11-07 06:36:20,751 INFO L87 Difference]: Start difference. First operand 533 states and 563 transitions. Second operand 32 states. [2020-11-07 06:36:24,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:24,662 INFO L93 Difference]: Finished difference Result 889 states and 938 transitions. [2020-11-07 06:36:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-07 06:36:24,663 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 269 [2020-11-07 06:36:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:24,666 INFO L225 Difference]: With dead ends: 889 [2020-11-07 06:36:24,666 INFO L226 Difference]: Without dead ends: 321 [2020-11-07 06:36:24,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2603 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1404, Invalid=7908, Unknown=0, NotChecked=0, Total=9312 [2020-11-07 06:36:24,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-11-07 06:36:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2020-11-07 06:36:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-07 06:36:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 332 transitions. [2020-11-07 06:36:24,741 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 332 transitions. Word has length 269 [2020-11-07 06:36:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:24,742 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 332 transitions. [2020-11-07 06:36:24,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 06:36:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 332 transitions. [2020-11-07 06:36:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-11-07 06:36:24,743 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:24,744 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:24,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 06:36:24,744 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:24,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:24,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2102832284, now seen corresponding path program 11 times [2020-11-07 06:36:24,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:24,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440660398] [2020-11-07 06:36:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:25,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 190 proven. 123 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-11-07 06:36:25,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440660398] [2020-11-07 06:36:25,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:25,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-11-07 06:36:25,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34816617] [2020-11-07 06:36:25,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 06:36:25,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:25,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 06:36:25,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2020-11-07 06:36:25,342 INFO L87 Difference]: Start difference. First operand 318 states and 332 transitions. Second operand 29 states. [2020-11-07 06:36:27,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:27,629 INFO L93 Difference]: Finished difference Result 813 states and 861 transitions. [2020-11-07 06:36:27,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-07 06:36:27,630 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 269 [2020-11-07 06:36:27,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:27,633 INFO L225 Difference]: With dead ends: 813 [2020-11-07 06:36:27,633 INFO L226 Difference]: Without dead ends: 670 [2020-11-07 06:36:27,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=801, Invalid=4029, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 06:36:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-11-07 06:36:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 404. [2020-11-07 06:36:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-11-07 06:36:27,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 424 transitions. [2020-11-07 06:36:27,734 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 424 transitions. Word has length 269 [2020-11-07 06:36:27,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:27,734 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 424 transitions. [2020-11-07 06:36:27,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 06:36:27,734 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 424 transitions. [2020-11-07 06:36:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-11-07 06:36:27,736 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:27,736 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:27,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 06:36:27,737 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:27,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:27,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1487808516, now seen corresponding path program 12 times [2020-11-07 06:36:27,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:27,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200423156] [2020-11-07 06:36:27,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:28,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 108 proven. 134 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-11-07 06:36:28,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200423156] [2020-11-07 06:36:28,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:28,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-11-07 06:36:28,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208254981] [2020-11-07 06:36:28,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 06:36:28,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:28,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 06:36:28,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2020-11-07 06:36:28,610 INFO L87 Difference]: Start difference. First operand 404 states and 424 transitions. Second operand 31 states. [2020-11-07 06:36:30,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:30,828 INFO L93 Difference]: Finished difference Result 687 states and 728 transitions. [2020-11-07 06:36:30,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-07 06:36:30,829 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 275 [2020-11-07 06:36:30,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:30,832 INFO L225 Difference]: With dead ends: 687 [2020-11-07 06:36:30,832 INFO L226 Difference]: Without dead ends: 546 [2020-11-07 06:36:30,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1198, Invalid=4964, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 06:36:30,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-11-07 06:36:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 410. [2020-11-07 06:36:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-11-07 06:36:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 430 transitions. [2020-11-07 06:36:30,948 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 430 transitions. Word has length 275 [2020-11-07 06:36:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:30,949 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 430 transitions. [2020-11-07 06:36:30,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 06:36:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 430 transitions. [2020-11-07 06:36:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-11-07 06:36:30,951 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:30,951 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:30,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 06:36:30,952 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:30,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:30,952 INFO L82 PathProgramCache]: Analyzing trace with hash 336152420, now seen corresponding path program 13 times [2020-11-07 06:36:30,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:30,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712799769] [2020-11-07 06:36:30,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:31,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 202 proven. 188 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-11-07 06:36:31,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712799769] [2020-11-07 06:36:31,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:31,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-11-07 06:36:31,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193860284] [2020-11-07 06:36:31,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 06:36:31,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:31,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 06:36:31,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 06:36:31,716 INFO L87 Difference]: Start difference. First operand 410 states and 430 transitions. Second operand 33 states. [2020-11-07 06:36:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:35,855 INFO L93 Difference]: Finished difference Result 955 states and 1011 transitions. [2020-11-07 06:36:35,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-07 06:36:35,856 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 281 [2020-11-07 06:36:35,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:35,860 INFO L225 Difference]: With dead ends: 955 [2020-11-07 06:36:35,860 INFO L226 Difference]: Without dead ends: 812 [2020-11-07 06:36:35,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1470, Invalid=8630, Unknown=0, NotChecked=0, Total=10100 [2020-11-07 06:36:35,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2020-11-07 06:36:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 458. [2020-11-07 06:36:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-11-07 06:36:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 481 transitions. [2020-11-07 06:36:36,015 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 481 transitions. Word has length 281 [2020-11-07 06:36:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:36,015 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 481 transitions. [2020-11-07 06:36:36,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 06:36:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 481 transitions. [2020-11-07 06:36:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-11-07 06:36:36,017 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:36,018 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:36,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 06:36:36,018 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:36,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:36,018 INFO L82 PathProgramCache]: Analyzing trace with hash -2052836660, now seen corresponding path program 14 times [2020-11-07 06:36:36,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:36,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56455006] [2020-11-07 06:36:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:36,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 112 proven. 239 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-11-07 06:36:36,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56455006] [2020-11-07 06:36:36,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:36,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-11-07 06:36:36,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381933394] [2020-11-07 06:36:36,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 06:36:36,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:36,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 06:36:36,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:36:36,884 INFO L87 Difference]: Start difference. First operand 458 states and 481 transitions. Second operand 35 states. [2020-11-07 06:36:39,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:39,703 INFO L93 Difference]: Finished difference Result 620 states and 653 transitions. [2020-11-07 06:36:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-07 06:36:39,704 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 281 [2020-11-07 06:36:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:39,707 INFO L225 Difference]: With dead ends: 620 [2020-11-07 06:36:39,707 INFO L226 Difference]: Without dead ends: 612 [2020-11-07 06:36:39,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1174, Invalid=5306, Unknown=0, NotChecked=0, Total=6480 [2020-11-07 06:36:39,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-11-07 06:36:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 583. [2020-11-07 06:36:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-11-07 06:36:39,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 616 transitions. [2020-11-07 06:36:39,885 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 616 transitions. Word has length 281 [2020-11-07 06:36:39,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:39,885 INFO L481 AbstractCegarLoop]: Abstraction has 583 states and 616 transitions. [2020-11-07 06:36:39,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 06:36:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 616 transitions. [2020-11-07 06:36:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-11-07 06:36:39,887 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:39,888 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:39,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 06:36:39,888 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:39,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:39,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1476523564, now seen corresponding path program 15 times [2020-11-07 06:36:39,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:39,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534463435] [2020-11-07 06:36:39,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:40,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 214 proven. 260 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2020-11-07 06:36:40,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534463435] [2020-11-07 06:36:40,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:40,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-11-07 06:36:40,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052314358] [2020-11-07 06:36:40,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 06:36:40,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:40,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 06:36:40,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 06:36:40,767 INFO L87 Difference]: Start difference. First operand 583 states and 616 transitions. Second operand 36 states. [2020-11-07 06:36:45,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:45,652 INFO L93 Difference]: Finished difference Result 1129 states and 1195 transitions. [2020-11-07 06:36:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-11-07 06:36:45,652 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 293 [2020-11-07 06:36:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:45,655 INFO L225 Difference]: With dead ends: 1129 [2020-11-07 06:36:45,655 INFO L226 Difference]: Without dead ends: 345 [2020-11-07 06:36:45,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1930, Invalid=11180, Unknown=0, NotChecked=0, Total=13110 [2020-11-07 06:36:45,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-11-07 06:36:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2020-11-07 06:36:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-11-07 06:36:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 357 transitions. [2020-11-07 06:36:45,727 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 357 transitions. Word has length 293 [2020-11-07 06:36:45,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:45,727 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 357 transitions. [2020-11-07 06:36:45,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 06:36:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 357 transitions. [2020-11-07 06:36:45,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-11-07 06:36:45,729 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:45,729 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:45,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 06:36:45,729 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:45,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:45,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1127254636, now seen corresponding path program 16 times [2020-11-07 06:36:45,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:45,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645294627] [2020-11-07 06:36:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:46,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 263 proven. 165 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-11-07 06:36:46,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645294627] [2020-11-07 06:36:46,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:46,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-11-07 06:36:46,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552816451] [2020-11-07 06:36:46,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 06:36:46,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:46,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 06:36:46,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 06:36:46,538 INFO L87 Difference]: Start difference. First operand 342 states and 357 transitions. Second operand 33 states. [2020-11-07 06:36:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:49,654 INFO L93 Difference]: Finished difference Result 947 states and 1004 transitions. [2020-11-07 06:36:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-11-07 06:36:49,655 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 293 [2020-11-07 06:36:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:49,659 INFO L225 Difference]: With dead ends: 947 [2020-11-07 06:36:49,659 INFO L226 Difference]: Without dead ends: 783 [2020-11-07 06:36:49,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1085, Invalid=5557, Unknown=0, NotChecked=0, Total=6642 [2020-11-07 06:36:49,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2020-11-07 06:36:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 450. [2020-11-07 06:36:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-11-07 06:36:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 472 transitions. [2020-11-07 06:36:49,770 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 472 transitions. Word has length 293 [2020-11-07 06:36:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:49,771 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 472 transitions. [2020-11-07 06:36:49,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 06:36:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 472 transitions. [2020-11-07 06:36:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-11-07 06:36:49,773 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:49,773 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:49,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 06:36:49,774 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:49,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1413138180, now seen corresponding path program 17 times [2020-11-07 06:36:49,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:49,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898643542] [2020-11-07 06:36:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:50,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 147 proven. 177 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2020-11-07 06:36:50,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898643542] [2020-11-07 06:36:50,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:50,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-11-07 06:36:50,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783685108] [2020-11-07 06:36:50,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 06:36:50,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:50,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 06:36:50,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:36:50,639 INFO L87 Difference]: Start difference. First operand 450 states and 472 transitions. Second operand 35 states. [2020-11-07 06:36:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:53,410 INFO L93 Difference]: Finished difference Result 761 states and 807 transitions. [2020-11-07 06:36:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-11-07 06:36:53,411 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 299 [2020-11-07 06:36:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:53,414 INFO L225 Difference]: With dead ends: 761 [2020-11-07 06:36:53,414 INFO L226 Difference]: Without dead ends: 608 [2020-11-07 06:36:53,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1588, Invalid=6602, Unknown=0, NotChecked=0, Total=8190 [2020-11-07 06:36:53,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2020-11-07 06:36:53,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 456. [2020-11-07 06:36:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-11-07 06:36:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 478 transitions. [2020-11-07 06:36:53,515 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 478 transitions. Word has length 299 [2020-11-07 06:36:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:53,516 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 478 transitions. [2020-11-07 06:36:53,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 06:36:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 478 transitions. [2020-11-07 06:36:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-11-07 06:36:53,517 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:53,517 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:53,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 06:36:53,517 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:53,518 INFO L82 PathProgramCache]: Analyzing trace with hash -122921892, now seen corresponding path program 18 times [2020-11-07 06:36:53,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:53,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218280044] [2020-11-07 06:36:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:54,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 275 proven. 242 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-11-07 06:36:54,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218280044] [2020-11-07 06:36:54,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:54,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-11-07 06:36:54,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267217116] [2020-11-07 06:36:54,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 06:36:54,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:54,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 06:36:54,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 06:36:54,449 INFO L87 Difference]: Start difference. First operand 456 states and 478 transitions. Second operand 37 states. [2020-11-07 06:36:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:59,833 INFO L93 Difference]: Finished difference Result 1128 states and 1196 transitions. [2020-11-07 06:36:59,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-11-07 06:36:59,834 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 305 [2020-11-07 06:36:59,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:59,838 INFO L225 Difference]: With dead ends: 1128 [2020-11-07 06:36:59,839 INFO L226 Difference]: Without dead ends: 964 [2020-11-07 06:36:59,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3924 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1949, Invalid=11623, Unknown=0, NotChecked=0, Total=13572 [2020-11-07 06:36:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-11-07 06:36:59,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 508. [2020-11-07 06:36:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-11-07 06:36:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 534 transitions. [2020-11-07 06:36:59,983 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 534 transitions. Word has length 305 [2020-11-07 06:36:59,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:59,983 INFO L481 AbstractCegarLoop]: Abstraction has 508 states and 534 transitions. [2020-11-07 06:36:59,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 06:36:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 534 transitions. [2020-11-07 06:36:59,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-11-07 06:36:59,985 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:59,986 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:59,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 06:36:59,986 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:59,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:59,986 INFO L82 PathProgramCache]: Analyzing trace with hash 756216772, now seen corresponding path program 19 times [2020-11-07 06:36:59,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:59,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686447264] [2020-11-07 06:36:59,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:01,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 151 proven. 321 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-11-07 06:37:01,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686447264] [2020-11-07 06:37:01,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:01,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-11-07 06:37:01,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942691838] [2020-11-07 06:37:01,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 06:37:01,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:01,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 06:37:01,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 06:37:01,094 INFO L87 Difference]: Start difference. First operand 508 states and 534 transitions. Second operand 39 states. [2020-11-07 06:37:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:04,665 INFO L93 Difference]: Finished difference Result 698 states and 736 transitions. [2020-11-07 06:37:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-07 06:37:04,666 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 305 [2020-11-07 06:37:04,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:04,669 INFO L225 Difference]: With dead ends: 698 [2020-11-07 06:37:04,669 INFO L226 Difference]: Without dead ends: 690 [2020-11-07 06:37:04,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1497, Invalid=6693, Unknown=0, NotChecked=0, Total=8190 [2020-11-07 06:37:04,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2020-11-07 06:37:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 657. [2020-11-07 06:37:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2020-11-07 06:37:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 695 transitions. [2020-11-07 06:37:04,880 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 695 transitions. Word has length 305 [2020-11-07 06:37:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:04,880 INFO L481 AbstractCegarLoop]: Abstraction has 657 states and 695 transitions. [2020-11-07 06:37:04,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 06:37:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 695 transitions. [2020-11-07 06:37:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-11-07 06:37:04,882 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:04,882 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:04,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 06:37:04,883 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:04,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:04,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1488803620, now seen corresponding path program 20 times [2020-11-07 06:37:04,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:04,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505427951] [2020-11-07 06:37:04,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:05,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 287 proven. 326 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2020-11-07 06:37:06,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505427951] [2020-11-07 06:37:06,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:06,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-11-07 06:37:06,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295481585] [2020-11-07 06:37:06,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 06:37:06,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:06,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 06:37:06,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:37:06,077 INFO L87 Difference]: Start difference. First operand 657 states and 695 transitions. Second operand 40 states. [2020-11-07 06:37:12,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:12,880 INFO L93 Difference]: Finished difference Result 1361 states and 1444 transitions. [2020-11-07 06:37:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-11-07 06:37:12,881 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 317 [2020-11-07 06:37:12,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:12,884 INFO L225 Difference]: With dead ends: 1361 [2020-11-07 06:37:12,884 INFO L226 Difference]: Without dead ends: 369 [2020-11-07 06:37:12,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5197 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2537, Invalid=15019, Unknown=0, NotChecked=0, Total=17556 [2020-11-07 06:37:12,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-11-07 06:37:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 366. [2020-11-07 06:37:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-11-07 06:37:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 382 transitions. [2020-11-07 06:37:13,000 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 382 transitions. Word has length 317 [2020-11-07 06:37:13,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:13,001 INFO L481 AbstractCegarLoop]: Abstraction has 366 states and 382 transitions. [2020-11-07 06:37:13,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 06:37:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 382 transitions. [2020-11-07 06:37:13,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-11-07 06:37:13,002 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:13,003 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:13,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 06:37:13,003 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:13,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:13,003 INFO L82 PathProgramCache]: Analyzing trace with hash 51151500, now seen corresponding path program 21 times [2020-11-07 06:37:13,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:13,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562807805] [2020-11-07 06:37:13,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:13,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 348 proven. 213 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-11-07 06:37:13,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562807805] [2020-11-07 06:37:13,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:13,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-11-07 06:37:13,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845631595] [2020-11-07 06:37:13,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 06:37:13,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:13,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 06:37:13,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 06:37:13,969 INFO L87 Difference]: Start difference. First operand 366 states and 382 transitions. Second operand 37 states. [2020-11-07 06:37:17,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:17,987 INFO L93 Difference]: Finished difference Result 1093 states and 1160 transitions. [2020-11-07 06:37:17,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-07 06:37:17,988 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 317 [2020-11-07 06:37:17,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:17,992 INFO L225 Difference]: With dead ends: 1093 [2020-11-07 06:37:17,993 INFO L226 Difference]: Without dead ends: 908 [2020-11-07 06:37:17,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1412, Invalid=7330, Unknown=0, NotChecked=0, Total=8742 [2020-11-07 06:37:17,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2020-11-07 06:37:18,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 500. [2020-11-07 06:37:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-11-07 06:37:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 525 transitions. [2020-11-07 06:37:18,138 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 525 transitions. Word has length 317 [2020-11-07 06:37:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:18,139 INFO L481 AbstractCegarLoop]: Abstraction has 500 states and 525 transitions. [2020-11-07 06:37:18,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 06:37:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 525 transitions. [2020-11-07 06:37:18,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-11-07 06:37:18,141 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:18,141 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:18,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 06:37:18,142 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:18,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:18,142 INFO L82 PathProgramCache]: Analyzing trace with hash 558403060, now seen corresponding path program 22 times [2020-11-07 06:37:18,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:18,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938740289] [2020-11-07 06:37:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:19,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 192 proven. 226 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2020-11-07 06:37:19,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938740289] [2020-11-07 06:37:19,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:19,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-11-07 06:37:19,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813058192] [2020-11-07 06:37:19,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 06:37:19,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:19,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 06:37:19,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 06:37:19,202 INFO L87 Difference]: Start difference. First operand 500 states and 525 transitions. Second operand 39 states. [2020-11-07 06:37:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:22,757 INFO L93 Difference]: Finished difference Result 835 states and 886 transitions. [2020-11-07 06:37:22,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-11-07 06:37:22,758 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 323 [2020-11-07 06:37:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:22,762 INFO L225 Difference]: With dead ends: 835 [2020-11-07 06:37:22,762 INFO L226 Difference]: Without dead ends: 670 [2020-11-07 06:37:22,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2968 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2033, Invalid=8473, Unknown=0, NotChecked=0, Total=10506 [2020-11-07 06:37:22,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-11-07 06:37:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 506. [2020-11-07 06:37:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-11-07 06:37:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 531 transitions. [2020-11-07 06:37:22,900 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 531 transitions. Word has length 323 [2020-11-07 06:37:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:22,900 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 531 transitions. [2020-11-07 06:37:22,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 06:37:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 531 transitions. [2020-11-07 06:37:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-11-07 06:37:22,902 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:22,903 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:22,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 06:37:22,903 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:22,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:22,903 INFO L82 PathProgramCache]: Analyzing trace with hash 802010452, now seen corresponding path program 23 times [2020-11-07 06:37:22,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:22,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33476890] [2020-11-07 06:37:22,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:24,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 360 proven. 302 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-11-07 06:37:24,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33476890] [2020-11-07 06:37:24,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:24,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-11-07 06:37:24,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882854535] [2020-11-07 06:37:24,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 06:37:24,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:24,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 06:37:24,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 06:37:24,100 INFO L87 Difference]: Start difference. First operand 506 states and 531 transitions. Second operand 41 states. [2020-11-07 06:37:31,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:31,055 INFO L93 Difference]: Finished difference Result 1313 states and 1394 transitions. [2020-11-07 06:37:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-11-07 06:37:31,056 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 329 [2020-11-07 06:37:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:31,061 INFO L225 Difference]: With dead ends: 1313 [2020-11-07 06:37:31,061 INFO L226 Difference]: Without dead ends: 1128 [2020-11-07 06:37:31,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5169 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2496, Invalid=15060, Unknown=0, NotChecked=0, Total=17556 [2020-11-07 06:37:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2020-11-07 06:37:31,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 566. [2020-11-07 06:37:31,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-11-07 06:37:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 595 transitions. [2020-11-07 06:37:31,274 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 595 transitions. Word has length 329 [2020-11-07 06:37:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:31,275 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 595 transitions. [2020-11-07 06:37:31,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 06:37:31,275 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 595 transitions. [2020-11-07 06:37:31,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-11-07 06:37:31,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:31,276 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:31,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 06:37:31,277 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:31,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:31,277 INFO L82 PathProgramCache]: Analyzing trace with hash 109836476, now seen corresponding path program 24 times [2020-11-07 06:37:31,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:31,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680260417] [2020-11-07 06:37:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:32,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 995 backedges. 196 proven. 415 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-11-07 06:37:32,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680260417] [2020-11-07 06:37:32,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:32,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-11-07 06:37:32,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247804875] [2020-11-07 06:37:32,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 06:37:32,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:32,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 06:37:32,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 06:37:32,588 INFO L87 Difference]: Start difference. First operand 566 states and 595 transitions. Second operand 43 states. [2020-11-07 06:37:37,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:37,046 INFO L93 Difference]: Finished difference Result 776 states and 819 transitions. [2020-11-07 06:37:37,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-07 06:37:37,047 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 329 [2020-11-07 06:37:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:37,051 INFO L225 Difference]: With dead ends: 776 [2020-11-07 06:37:37,051 INFO L226 Difference]: Without dead ends: 768 [2020-11-07 06:37:37,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1860, Invalid=8240, Unknown=0, NotChecked=0, Total=10100 [2020-11-07 06:37:37,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-11-07 06:37:37,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 731. [2020-11-07 06:37:37,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-11-07 06:37:37,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 774 transitions. [2020-11-07 06:37:37,355 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 774 transitions. Word has length 329 [2020-11-07 06:37:37,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:37,355 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 774 transitions. [2020-11-07 06:37:37,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 06:37:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 774 transitions. [2020-11-07 06:37:37,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-11-07 06:37:37,358 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:37,359 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:37,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-07 06:37:37,359 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:37,359 INFO L82 PathProgramCache]: Analyzing trace with hash 816905244, now seen corresponding path program 25 times [2020-11-07 06:37:37,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:37,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388742439] [2020-11-07 06:37:37,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:38,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 372 proven. 398 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2020-11-07 06:37:38,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388742439] [2020-11-07 06:37:38,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:38,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-11-07 06:37:38,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115137108] [2020-11-07 06:37:38,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 06:37:38,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:38,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 06:37:38,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1681, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 06:37:38,729 INFO L87 Difference]: Start difference. First operand 731 states and 774 transitions. Second operand 44 states. [2020-11-07 06:37:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:47,546 INFO L93 Difference]: Finished difference Result 1605 states and 1706 transitions. [2020-11-07 06:37:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-11-07 06:37:47,548 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 341 [2020-11-07 06:37:47,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:47,550 INFO L225 Difference]: With dead ends: 1605 [2020-11-07 06:37:47,550 INFO L226 Difference]: Without dead ends: 393 [2020-11-07 06:37:47,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6830 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3225, Invalid=19425, Unknown=0, NotChecked=0, Total=22650 [2020-11-07 06:37:47,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-11-07 06:37:47,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 390. [2020-11-07 06:37:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-11-07 06:37:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 407 transitions. [2020-11-07 06:37:47,674 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 407 transitions. Word has length 341 [2020-11-07 06:37:47,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:47,675 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 407 transitions. [2020-11-07 06:37:47,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 06:37:47,675 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 407 transitions. [2020-11-07 06:37:47,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-11-07 06:37:47,676 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:47,676 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:47,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-07 06:37:47,677 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:47,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:47,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1978805372, now seen corresponding path program 26 times [2020-11-07 06:37:47,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:47,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240031641] [2020-11-07 06:37:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:48,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 445 proven. 267 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-11-07 06:37:48,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240031641] [2020-11-07 06:37:48,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:48,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-11-07 06:37:48,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381049330] [2020-11-07 06:37:48,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 06:37:48,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:48,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 06:37:48,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 06:37:48,926 INFO L87 Difference]: Start difference. First operand 390 states and 407 transitions. Second operand 41 states. [2020-11-07 06:37:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:54,244 INFO L93 Difference]: Finished difference Result 1251 states and 1329 transitions. [2020-11-07 06:37:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-07 06:37:54,245 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 341 [2020-11-07 06:37:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:54,249 INFO L225 Difference]: With dead ends: 1251 [2020-11-07 06:37:54,250 INFO L226 Difference]: Without dead ends: 1045 [2020-11-07 06:37:54,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1782, Invalid=9348, Unknown=0, NotChecked=0, Total=11130 [2020-11-07 06:37:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2020-11-07 06:37:54,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 550. [2020-11-07 06:37:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2020-11-07 06:37:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 578 transitions. [2020-11-07 06:37:54,456 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 578 transitions. Word has length 341 [2020-11-07 06:37:54,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:54,456 INFO L481 AbstractCegarLoop]: Abstraction has 550 states and 578 transitions. [2020-11-07 06:37:54,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 06:37:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 578 transitions. [2020-11-07 06:37:54,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-11-07 06:37:54,458 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:54,459 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:54,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-07 06:37:54,459 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:54,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2067277548, now seen corresponding path program 27 times [2020-11-07 06:37:54,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:54,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628701290] [2020-11-07 06:37:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:55,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 243 proven. 281 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2020-11-07 06:37:55,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628701290] [2020-11-07 06:37:55,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:55,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-11-07 06:37:55,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562870418] [2020-11-07 06:37:55,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 06:37:55,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:55,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 06:37:55,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 06:37:55,834 INFO L87 Difference]: Start difference. First operand 550 states and 578 transitions. Second operand 43 states. [2020-11-07 06:38:00,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:00,451 INFO L93 Difference]: Finished difference Result 909 states and 965 transitions. [2020-11-07 06:38:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-11-07 06:38:00,452 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 347 [2020-11-07 06:38:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:00,456 INFO L225 Difference]: With dead ends: 909 [2020-11-07 06:38:00,456 INFO L226 Difference]: Without dead ends: 732 [2020-11-07 06:38:00,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3774 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2533, Invalid=10577, Unknown=0, NotChecked=0, Total=13110 [2020-11-07 06:38:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2020-11-07 06:38:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 556. [2020-11-07 06:38:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-11-07 06:38:00,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 584 transitions. [2020-11-07 06:38:00,639 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 584 transitions. Word has length 347 [2020-11-07 06:38:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:00,639 INFO L481 AbstractCegarLoop]: Abstraction has 556 states and 584 transitions. [2020-11-07 06:38:00,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 06:38:00,639 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 584 transitions. [2020-11-07 06:38:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-11-07 06:38:00,641 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:00,641 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:00,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-11-07 06:38:00,641 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:00,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:00,641 INFO L82 PathProgramCache]: Analyzing trace with hash -210939316, now seen corresponding path program 28 times [2020-11-07 06:38:00,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:00,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622881042] [2020-11-07 06:38:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:02,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 457 proven. 368 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-11-07 06:38:02,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622881042] [2020-11-07 06:38:02,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:02,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-11-07 06:38:02,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321559684] [2020-11-07 06:38:02,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 06:38:02,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:02,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 06:38:02,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1739, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 06:38:02,166 INFO L87 Difference]: Start difference. First operand 556 states and 584 transitions. Second operand 45 states. [2020-11-07 06:38:11,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:11,427 INFO L93 Difference]: Finished difference Result 1510 states and 1605 transitions. [2020-11-07 06:38:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-11-07 06:38:11,428 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 353 [2020-11-07 06:38:11,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:11,433 INFO L225 Difference]: With dead ends: 1510 [2020-11-07 06:38:11,434 INFO L226 Difference]: Without dead ends: 1304 [2020-11-07 06:38:11,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6586 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3111, Invalid=18941, Unknown=0, NotChecked=0, Total=22052 [2020-11-07 06:38:11,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2020-11-07 06:38:11,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 628. [2020-11-07 06:38:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2020-11-07 06:38:11,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 661 transitions. [2020-11-07 06:38:11,708 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 661 transitions. Word has length 353 [2020-11-07 06:38:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:11,708 INFO L481 AbstractCegarLoop]: Abstraction has 628 states and 661 transitions. [2020-11-07 06:38:11,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 06:38:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 661 transitions. [2020-11-07 06:38:11,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-11-07 06:38:11,711 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:11,711 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:11,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-11-07 06:38:11,711 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:11,712 INFO L82 PathProgramCache]: Analyzing trace with hash 177160628, now seen corresponding path program 29 times [2020-11-07 06:38:11,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:11,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797280134] [2020-11-07 06:38:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:13,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 247 proven. 521 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-11-07 06:38:13,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797280134] [2020-11-07 06:38:13,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:13,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-11-07 06:38:13,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385769087] [2020-11-07 06:38:13,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-07 06:38:13,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:13,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-07 06:38:13,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1907, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 06:38:13,459 INFO L87 Difference]: Start difference. First operand 628 states and 661 transitions. Second operand 47 states. [2020-11-07 06:38:18,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:18,721 INFO L93 Difference]: Finished difference Result 854 states and 902 transitions. [2020-11-07 06:38:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-11-07 06:38:18,723 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 353 [2020-11-07 06:38:18,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:18,726 INFO L225 Difference]: With dead ends: 854 [2020-11-07 06:38:18,727 INFO L226 Difference]: Without dead ends: 846 [2020-11-07 06:38:18,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2263, Invalid=9947, Unknown=0, NotChecked=0, Total=12210 [2020-11-07 06:38:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2020-11-07 06:38:19,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 805. [2020-11-07 06:38:19,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 805 states. [2020-11-07 06:38:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 853 transitions. [2020-11-07 06:38:19,124 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 853 transitions. Word has length 353 [2020-11-07 06:38:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:19,124 INFO L481 AbstractCegarLoop]: Abstraction has 805 states and 853 transitions. [2020-11-07 06:38:19,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-07 06:38:19,124 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 853 transitions. [2020-11-07 06:38:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-11-07 06:38:19,127 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:19,128 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:19,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-11-07 06:38:19,128 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:19,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:19,129 INFO L82 PathProgramCache]: Analyzing trace with hash 433906964, now seen corresponding path program 30 times [2020-11-07 06:38:19,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:19,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414585884] [2020-11-07 06:38:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:20,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 469 proven. 476 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2020-11-07 06:38:20,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414585884] [2020-11-07 06:38:20,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:20,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-11-07 06:38:20,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724486017] [2020-11-07 06:38:20,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-07 06:38:20,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:20,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-07 06:38:20,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2005, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 06:38:20,864 INFO L87 Difference]: Start difference. First operand 805 states and 853 transitions. Second operand 48 states. [2020-11-07 06:38:32,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:32,418 INFO L93 Difference]: Finished difference Result 1861 states and 1981 transitions. [2020-11-07 06:38:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-11-07 06:38:32,419 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 365 [2020-11-07 06:38:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:32,421 INFO L225 Difference]: With dead ends: 1861 [2020-11-07 06:38:32,421 INFO L226 Difference]: Without dead ends: 417 [2020-11-07 06:38:32,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8687 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=3994, Invalid=24398, Unknown=0, NotChecked=0, Total=28392 [2020-11-07 06:38:32,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-11-07 06:38:32,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 414. [2020-11-07 06:38:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-11-07 06:38:32,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 432 transitions. [2020-11-07 06:38:32,574 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 432 transitions. Word has length 365 [2020-11-07 06:38:32,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:32,574 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 432 transitions. [2020-11-07 06:38:32,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-07 06:38:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 432 transitions. [2020-11-07 06:38:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-11-07 06:38:32,575 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:32,576 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:32,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-11-07 06:38:32,576 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:32,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:32,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1974245252, now seen corresponding path program 31 times [2020-11-07 06:38:32,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:32,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866704758] [2020-11-07 06:38:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:34,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1321 backedges. 554 proven. 327 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-11-07 06:38:34,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866704758] [2020-11-07 06:38:34,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:34,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-11-07 06:38:34,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753997223] [2020-11-07 06:38:34,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 06:38:34,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:34,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 06:38:34,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1709, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 06:38:34,185 INFO L87 Difference]: Start difference. First operand 414 states and 432 transitions. Second operand 45 states. [2020-11-07 06:38:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:41,037 INFO L93 Difference]: Finished difference Result 1421 states and 1511 transitions. [2020-11-07 06:38:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-11-07 06:38:41,044 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 365 [2020-11-07 06:38:41,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:41,048 INFO L225 Difference]: With dead ends: 1421 [2020-11-07 06:38:41,049 INFO L226 Difference]: Without dead ends: 1194 [2020-11-07 06:38:41,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3561 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2195, Invalid=11611, Unknown=0, NotChecked=0, Total=13806 [2020-11-07 06:38:41,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2020-11-07 06:38:41,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 600. [2020-11-07 06:38:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-11-07 06:38:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 631 transitions. [2020-11-07 06:38:41,301 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 631 transitions. Word has length 365 [2020-11-07 06:38:41,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:41,302 INFO L481 AbstractCegarLoop]: Abstraction has 600 states and 631 transitions. [2020-11-07 06:38:41,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 06:38:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 631 transitions. [2020-11-07 06:38:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-11-07 06:38:41,304 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:41,305 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:41,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-11-07 06:38:41,305 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:41,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2048132068, now seen corresponding path program 32 times [2020-11-07 06:38:41,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:41,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373420180] [2020-11-07 06:38:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:43,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 300 proven. 342 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2020-11-07 06:38:43,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373420180] [2020-11-07 06:38:43,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:43,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-11-07 06:38:43,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163101528] [2020-11-07 06:38:43,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-07 06:38:43,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:43,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-07 06:38:43,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1849, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 06:38:43,127 INFO L87 Difference]: Start difference. First operand 600 states and 631 transitions. Second operand 47 states. [2020-11-07 06:38:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:49,032 INFO L93 Difference]: Finished difference Result 983 states and 1044 transitions. [2020-11-07 06:38:49,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-11-07 06:38:49,034 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 371 [2020-11-07 06:38:49,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:49,038 INFO L225 Difference]: With dead ends: 983 [2020-11-07 06:38:49,038 INFO L226 Difference]: Without dead ends: 794 [2020-11-07 06:38:49,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3088, Invalid=12914, Unknown=0, NotChecked=0, Total=16002 [2020-11-07 06:38:49,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-11-07 06:38:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 606. [2020-11-07 06:38:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2020-11-07 06:38:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 637 transitions. [2020-11-07 06:38:49,418 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 637 transitions. Word has length 371 [2020-11-07 06:38:49,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:49,418 INFO L481 AbstractCegarLoop]: Abstraction has 606 states and 637 transitions. [2020-11-07 06:38:49,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-07 06:38:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 637 transitions. [2020-11-07 06:38:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-11-07 06:38:49,421 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:49,421 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:49,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-11-07 06:38:49,421 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:49,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:49,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1140116668, now seen corresponding path program 33 times [2020-11-07 06:38:49,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:49,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124331687] [2020-11-07 06:38:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:51,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 566 proven. 440 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-11-07 06:38:51,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124331687] [2020-11-07 06:38:51,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:51,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-11-07 06:38:51,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383477431] [2020-11-07 06:38:51,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-07 06:38:51,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:51,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-07 06:38:51,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2067, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 06:38:51,431 INFO L87 Difference]: Start difference. First operand 606 states and 637 transitions. Second operand 49 states. [2020-11-07 06:39:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:03,401 INFO L93 Difference]: Finished difference Result 1719 states and 1829 transitions. [2020-11-07 06:39:03,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-11-07 06:39:03,403 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 377 [2020-11-07 06:39:03,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:03,410 INFO L225 Difference]: With dead ends: 1719 [2020-11-07 06:39:03,410 INFO L226 Difference]: Without dead ends: 1492 [2020-11-07 06:39:03,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8175 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=3794, Invalid=23266, Unknown=0, NotChecked=0, Total=27060 [2020-11-07 06:39:03,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2020-11-07 06:39:03,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 690. [2020-11-07 06:39:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-11-07 06:39:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 727 transitions. [2020-11-07 06:39:03,772 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 727 transitions. Word has length 377 [2020-11-07 06:39:03,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:03,773 INFO L481 AbstractCegarLoop]: Abstraction has 690 states and 727 transitions. [2020-11-07 06:39:03,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-07 06:39:03,773 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 727 transitions. [2020-11-07 06:39:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-11-07 06:39:03,775 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:03,775 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:03,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-11-07 06:39:03,775 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:03,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1877160276, now seen corresponding path program 34 times [2020-11-07 06:39:03,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:03,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848184538] [2020-11-07 06:39:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:06,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 304 proven. 639 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2020-11-07 06:39:06,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848184538] [2020-11-07 06:39:06,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:06,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-11-07 06:39:06,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606831905] [2020-11-07 06:39:06,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-11-07 06:39:06,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:06,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-11-07 06:39:06,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=2249, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 06:39:06,146 INFO L87 Difference]: Start difference. First operand 690 states and 727 transitions. Second operand 51 states. [2020-11-07 06:39:13,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:13,340 INFO L93 Difference]: Finished difference Result 932 states and 985 transitions. [2020-11-07 06:39:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-07 06:39:13,341 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 377 [2020-11-07 06:39:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:13,346 INFO L225 Difference]: With dead ends: 932 [2020-11-07 06:39:13,347 INFO L226 Difference]: Without dead ends: 924 [2020-11-07 06:39:13,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3367 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2706, Invalid=11814, Unknown=0, NotChecked=0, Total=14520 [2020-11-07 06:39:13,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2020-11-07 06:39:13,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 879. [2020-11-07 06:39:13,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-11-07 06:39:13,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 932 transitions. [2020-11-07 06:39:13,842 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 932 transitions. Word has length 377 [2020-11-07 06:39:13,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:13,842 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 932 transitions. [2020-11-07 06:39:13,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-11-07 06:39:13,842 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 932 transitions. [2020-11-07 06:39:13,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-11-07 06:39:13,844 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:13,845 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:13,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-11-07 06:39:13,845 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:13,845 INFO L82 PathProgramCache]: Analyzing trace with hash -859762164, now seen corresponding path program 35 times [2020-11-07 06:39:13,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:13,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158417485] [2020-11-07 06:39:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:16,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1583 backedges. 578 proven. 560 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2020-11-07 06:39:16,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158417485] [2020-11-07 06:39:16,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:16,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-11-07 06:39:16,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061561366] [2020-11-07 06:39:16,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-07 06:39:16,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:16,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-07 06:39:16,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2357, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 06:39:16,138 INFO L87 Difference]: Start difference. First operand 879 states and 932 transitions. Second operand 52 states. [2020-11-07 06:39:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:30,386 INFO L93 Difference]: Finished difference Result 2129 states and 2269 transitions. [2020-11-07 06:39:30,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-11-07 06:39:30,388 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 389 [2020-11-07 06:39:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:30,391 INFO L225 Difference]: With dead ends: 2129 [2020-11-07 06:39:30,391 INFO L226 Difference]: Without dead ends: 441 [2020-11-07 06:39:30,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10768 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=4844, Invalid=29938, Unknown=0, NotChecked=0, Total=34782 [2020-11-07 06:39:30,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-11-07 06:39:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 438. [2020-11-07 06:39:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-11-07 06:39:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 457 transitions. [2020-11-07 06:39:30,576 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 457 transitions. Word has length 389 [2020-11-07 06:39:30,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:30,576 INFO L481 AbstractCegarLoop]: Abstraction has 438 states and 457 transitions. [2020-11-07 06:39:30,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-07 06:39:30,576 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 457 transitions. [2020-11-07 06:39:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-11-07 06:39:30,578 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:30,578 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:30,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-11-07 06:39:30,578 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:30,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:30,579 INFO L82 PathProgramCache]: Analyzing trace with hash -623033996, now seen corresponding path program 36 times [2020-11-07 06:39:30,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:30,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010899140] [2020-11-07 06:39:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:32,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1570 backedges. 675 proven. 393 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2020-11-07 06:39:32,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010899140] [2020-11-07 06:39:32,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:32,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-11-07 06:39:32,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000935254] [2020-11-07 06:39:32,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-07 06:39:32,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:32,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-07 06:39:32,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2033, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 06:39:32,929 INFO L87 Difference]: Start difference. First operand 438 states and 457 transitions. Second operand 49 states. [2020-11-07 06:39:41,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:41,531 INFO L93 Difference]: Finished difference Result 1603 states and 1706 transitions. [2020-11-07 06:39:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-11-07 06:39:41,533 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 389 [2020-11-07 06:39:41,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:41,537 INFO L225 Difference]: With dead ends: 1603 [2020-11-07 06:39:41,537 INFO L226 Difference]: Without dead ends: 1355 [2020-11-07 06:39:41,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4375 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2651, Invalid=14119, Unknown=0, NotChecked=0, Total=16770 [2020-11-07 06:39:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-11-07 06:39:41,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 650. [2020-11-07 06:39:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2020-11-07 06:39:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 684 transitions. [2020-11-07 06:39:41,832 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 684 transitions. Word has length 389 [2020-11-07 06:39:41,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:41,832 INFO L481 AbstractCegarLoop]: Abstraction has 650 states and 684 transitions. [2020-11-07 06:39:41,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-07 06:39:41,832 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 684 transitions. [2020-11-07 06:39:41,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-11-07 06:39:41,834 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:41,834 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:41,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-11-07 06:39:41,834 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:41,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2094802140, now seen corresponding path program 37 times [2020-11-07 06:39:41,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:41,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986217773] [2020-11-07 06:39:41,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:44,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 363 proven. 409 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2020-11-07 06:39:44,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986217773] [2020-11-07 06:39:44,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:44,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-11-07 06:39:44,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851424844] [2020-11-07 06:39:44,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-11-07 06:39:44,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:44,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-11-07 06:39:44,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 06:39:44,341 INFO L87 Difference]: Start difference. First operand 650 states and 684 transitions. Second operand 51 states. [2020-11-07 06:39:51,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:51,910 INFO L93 Difference]: Finished difference Result 1057 states and 1123 transitions. [2020-11-07 06:39:51,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-11-07 06:39:51,912 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 395 [2020-11-07 06:39:51,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:51,915 INFO L225 Difference]: With dead ends: 1057 [2020-11-07 06:39:51,915 INFO L226 Difference]: Without dead ends: 856 [2020-11-07 06:39:51,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5677 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=3698, Invalid=15484, Unknown=0, NotChecked=0, Total=19182 [2020-11-07 06:39:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2020-11-07 06:39:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 656. [2020-11-07 06:39:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-11-07 06:39:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 690 transitions. [2020-11-07 06:39:52,222 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 690 transitions. Word has length 395 [2020-11-07 06:39:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:52,222 INFO L481 AbstractCegarLoop]: Abstraction has 656 states and 690 transitions. [2020-11-07 06:39:52,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-11-07 06:39:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 690 transitions. [2020-11-07 06:39:52,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-11-07 06:39:52,225 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:52,225 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:52,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-11-07 06:39:52,225 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:52,226 INFO L82 PathProgramCache]: Analyzing trace with hash -525903812, now seen corresponding path program 38 times [2020-11-07 06:39:52,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:52,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809347111] [2020-11-07 06:39:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:54,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1707 backedges. 687 proven. 518 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2020-11-07 06:39:55,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809347111] [2020-11-07 06:39:55,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:55,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-11-07 06:39:55,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946795628] [2020-11-07 06:39:55,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-07 06:39:55,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:55,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-07 06:39:55,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2423, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 06:39:55,134 INFO L87 Difference]: Start difference. First operand 656 states and 690 transitions. Second operand 53 states. [2020-11-07 06:40:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:10,500 INFO L93 Difference]: Finished difference Result 1940 states and 2066 transitions. [2020-11-07 06:40:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-11-07 06:40:10,503 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 401 [2020-11-07 06:40:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:10,506 INFO L225 Difference]: With dead ends: 1940 [2020-11-07 06:40:10,506 INFO L226 Difference]: Without dead ends: 1692 [2020-11-07 06:40:10,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9936 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=4545, Invalid=28035, Unknown=0, NotChecked=0, Total=32580 [2020-11-07 06:40:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2020-11-07 06:40:10,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 752. [2020-11-07 06:40:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2020-11-07 06:40:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 793 transitions. [2020-11-07 06:40:10,973 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 793 transitions. Word has length 401 [2020-11-07 06:40:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:10,973 INFO L481 AbstractCegarLoop]: Abstraction has 752 states and 793 transitions. [2020-11-07 06:40:10,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-07 06:40:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 793 transitions. [2020-11-07 06:40:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-11-07 06:40:10,976 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:10,976 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:10,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-11-07 06:40:10,976 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:10,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:10,976 INFO L82 PathProgramCache]: Analyzing trace with hash -323706972, now seen corresponding path program 39 times [2020-11-07 06:40:10,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:10,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551885391] [2020-11-07 06:40:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:13,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1706 backedges. 367 proven. 769 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-11-07 06:40:14,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551885391] [2020-11-07 06:40:14,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:14,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-11-07 06:40:14,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176114] [2020-11-07 06:40:14,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-11-07 06:40:14,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:14,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-11-07 06:40:14,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=2619, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 06:40:14,119 INFO L87 Difference]: Start difference. First operand 752 states and 793 transitions. Second operand 55 states. [2020-11-07 06:40:23,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:23,024 INFO L93 Difference]: Finished difference Result 1010 states and 1068 transitions. [2020-11-07 06:40:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-11-07 06:40:23,026 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 401 [2020-11-07 06:40:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:23,029 INFO L225 Difference]: With dead ends: 1010 [2020-11-07 06:40:23,029 INFO L226 Difference]: Without dead ends: 1002 [2020-11-07 06:40:23,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3980 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=3189, Invalid=13841, Unknown=0, NotChecked=0, Total=17030 [2020-11-07 06:40:23,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-11-07 06:40:23,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 953. [2020-11-07 06:40:23,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2020-11-07 06:40:23,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1011 transitions. [2020-11-07 06:40:23,673 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1011 transitions. Word has length 401 [2020-11-07 06:40:23,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:23,673 INFO L481 AbstractCegarLoop]: Abstraction has 953 states and 1011 transitions. [2020-11-07 06:40:23,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-11-07 06:40:23,674 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1011 transitions. [2020-11-07 06:40:23,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-11-07 06:40:23,676 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:23,676 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:23,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-11-07 06:40:23,676 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:23,677 INFO L82 PathProgramCache]: Analyzing trace with hash 542999300, now seen corresponding path program 40 times [2020-11-07 06:40:23,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:23,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418409572] [2020-11-07 06:40:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:26,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 699 proven. 650 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-11-07 06:40:27,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418409572] [2020-11-07 06:40:27,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:27,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-11-07 06:40:27,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797746279] [2020-11-07 06:40:27,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-07 06:40:27,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:27,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-07 06:40:27,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=2737, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 06:40:27,016 INFO L87 Difference]: Start difference. First operand 953 states and 1011 transitions. Second operand 56 states. [2020-11-07 06:40:47,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:47,468 INFO L93 Difference]: Finished difference Result 2409 states and 2570 transitions. [2020-11-07 06:40:47,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-11-07 06:40:47,470 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 413 [2020-11-07 06:40:47,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:47,472 INFO L225 Difference]: With dead ends: 2409 [2020-11-07 06:40:47,472 INFO L226 Difference]: Without dead ends: 465 [2020-11-07 06:40:47,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13073 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=5775, Invalid=36045, Unknown=0, NotChecked=0, Total=41820 [2020-11-07 06:40:47,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-11-07 06:40:47,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 462. [2020-11-07 06:40:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-11-07 06:40:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 482 transitions. [2020-11-07 06:40:47,711 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 482 transitions. Word has length 413 [2020-11-07 06:40:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:47,711 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 482 transitions. [2020-11-07 06:40:47,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-07 06:40:47,711 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 482 transitions. [2020-11-07 06:40:47,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-11-07 06:40:47,713 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:47,713 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:47,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-11-07 06:40:47,714 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:47,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:47,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1859428756, now seen corresponding path program 41 times [2020-11-07 06:40:47,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:47,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400797520] [2020-11-07 06:40:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:50,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1843 backedges. 808 proven. 465 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-11-07 06:40:50,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400797520] [2020-11-07 06:40:50,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:50,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-11-07 06:40:50,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243364562] [2020-11-07 06:40:50,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-07 06:40:50,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:50,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-07 06:40:50,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 06:40:50,825 INFO L87 Difference]: Start difference. First operand 462 states and 482 transitions. Second operand 53 states. [2020-11-07 06:41:03,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:03,429 INFO L93 Difference]: Finished difference Result 1797 states and 1914 transitions. [2020-11-07 06:41:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-11-07 06:41:03,431 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 413 [2020-11-07 06:41:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:03,434 INFO L225 Difference]: With dead ends: 1797 [2020-11-07 06:41:03,434 INFO L226 Difference]: Without dead ends: 1528 [2020-11-07 06:41:03,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5273 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=3150, Invalid=16872, Unknown=0, NotChecked=0, Total=20022 [2020-11-07 06:41:03,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2020-11-07 06:41:03,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 700. [2020-11-07 06:41:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2020-11-07 06:41:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 737 transitions. [2020-11-07 06:41:03,857 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 737 transitions. Word has length 413 [2020-11-07 06:41:03,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:03,857 INFO L481 AbstractCegarLoop]: Abstraction has 700 states and 737 transitions. [2020-11-07 06:41:03,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-07 06:41:03,857 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 737 transitions. [2020-11-07 06:41:03,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-11-07 06:41:03,859 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:03,860 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:03,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-11-07 06:41:03,860 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:03,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:03,860 INFO L82 PathProgramCache]: Analyzing trace with hash 554731988, now seen corresponding path program 42 times [2020-11-07 06:41:03,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:03,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227100394] [2020-11-07 06:41:03,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:07,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1917 backedges. 432 proven. 482 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2020-11-07 06:41:07,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227100394] [2020-11-07 06:41:07,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:07,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-11-07 06:41:07,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929756865] [2020-11-07 06:41:07,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-11-07 06:41:07,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:07,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-11-07 06:41:07,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2549, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 06:41:07,371 INFO L87 Difference]: Start difference. First operand 700 states and 737 transitions. Second operand 55 states. [2020-11-07 06:41:16,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:16,899 INFO L93 Difference]: Finished difference Result 1131 states and 1202 transitions. [2020-11-07 06:41:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-11-07 06:41:16,901 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 419 [2020-11-07 06:41:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:16,904 INFO L225 Difference]: With dead ends: 1131 [2020-11-07 06:41:16,904 INFO L226 Difference]: Without dead ends: 918 [2020-11-07 06:41:16,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6774 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=4363, Invalid=18287, Unknown=0, NotChecked=0, Total=22650 [2020-11-07 06:41:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2020-11-07 06:41:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 706. [2020-11-07 06:41:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-11-07 06:41:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 743 transitions. [2020-11-07 06:41:17,318 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 743 transitions. Word has length 419 [2020-11-07 06:41:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:17,318 INFO L481 AbstractCegarLoop]: Abstraction has 706 states and 743 transitions. [2020-11-07 06:41:17,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-11-07 06:41:17,318 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 743 transitions. [2020-11-07 06:41:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-11-07 06:41:17,321 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:17,321 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:17,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-11-07 06:41:17,321 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:17,322 INFO L82 PathProgramCache]: Analyzing trace with hash 918667572, now seen corresponding path program 43 times [2020-11-07 06:41:17,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:17,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953807401] [2020-11-07 06:41:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:20,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1992 backedges. 820 proven. 602 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-11-07 06:41:21,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953807401] [2020-11-07 06:41:21,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:21,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-11-07 06:41:21,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113969174] [2020-11-07 06:41:21,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-11-07 06:41:21,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:21,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-11-07 06:41:21,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2807, Unknown=0, NotChecked=0, Total=3192 [2020-11-07 06:41:21,068 INFO L87 Difference]: Start difference. First operand 706 states and 743 transitions. Second operand 57 states. [2020-11-07 06:41:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:43,136 INFO L93 Difference]: Finished difference Result 2173 states and 2316 transitions. [2020-11-07 06:41:43,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2020-11-07 06:41:43,140 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 425 [2020-11-07 06:41:43,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:43,144 INFO L225 Difference]: With dead ends: 2173 [2020-11-07 06:41:43,144 INFO L226 Difference]: Without dead ends: 1904 [2020-11-07 06:41:43,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11869 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=5364, Invalid=33248, Unknown=0, NotChecked=0, Total=38612 [2020-11-07 06:41:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-11-07 06:41:43,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 814. [2020-11-07 06:41:43,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2020-11-07 06:41:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 859 transitions. [2020-11-07 06:41:43,756 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 859 transitions. Word has length 425 [2020-11-07 06:41:43,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:43,756 INFO L481 AbstractCegarLoop]: Abstraction has 814 states and 859 transitions. [2020-11-07 06:41:43,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-11-07 06:41:43,756 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 859 transitions. [2020-11-07 06:41:43,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-11-07 06:41:43,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:43,759 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:43,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-11-07 06:41:43,759 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:43,759 INFO L82 PathProgramCache]: Analyzing trace with hash 341226652, now seen corresponding path program 44 times [2020-11-07 06:41:43,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:43,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298870190] [2020-11-07 06:41:43,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:47,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1991 backedges. 436 proven. 911 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2020-11-07 06:41:48,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298870190] [2020-11-07 06:41:48,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:48,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-11-07 06:41:48,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827534357] [2020-11-07 06:41:48,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-11-07 06:41:48,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:48,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-11-07 06:41:48,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=3017, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 06:41:48,023 INFO L87 Difference]: Start difference. First operand 814 states and 859 transitions. Second operand 59 states. [2020-11-07 06:42:00,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:00,462 INFO L93 Difference]: Finished difference Result 1088 states and 1151 transitions. [2020-11-07 06:42:00,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-11-07 06:42:00,465 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 425 [2020-11-07 06:42:00,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:00,468 INFO L225 Difference]: With dead ends: 1088 [2020-11-07 06:42:00,468 INFO L226 Difference]: Without dead ends: 1080 [2020-11-07 06:42:00,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4644 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=3712, Invalid=16028, Unknown=0, NotChecked=0, Total=19740 [2020-11-07 06:42:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2020-11-07 06:42:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1027. [2020-11-07 06:42:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1027 states. [2020-11-07 06:42:01,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1090 transitions. [2020-11-07 06:42:01,276 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1090 transitions. Word has length 425 [2020-11-07 06:42:01,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:01,276 INFO L481 AbstractCegarLoop]: Abstraction has 1027 states and 1090 transitions. [2020-11-07 06:42:01,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-11-07 06:42:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1090 transitions. [2020-11-07 06:42:01,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-11-07 06:42:01,279 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:01,279 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:01,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-11-07 06:42:01,279 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:01,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1439549444, now seen corresponding path program 45 times [2020-11-07 06:42:01,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:01,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409841733] [2020-11-07 06:42:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:05,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 832 proven. 746 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2020-11-07 06:42:05,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409841733] [2020-11-07 06:42:05,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:05,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-11-07 06:42:05,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199169868] [2020-11-07 06:42:05,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-11-07 06:42:05,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:05,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-11-07 06:42:05,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=3145, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 06:42:05,598 INFO L87 Difference]: Start difference. First operand 1027 states and 1090 transitions. Second operand 60 states. [2020-11-07 06:42:33,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:33,666 INFO L93 Difference]: Finished difference Result 2701 states and 2884 transitions. [2020-11-07 06:42:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-11-07 06:42:33,669 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 437 [2020-11-07 06:42:33,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:33,671 INFO L225 Difference]: With dead ends: 2701 [2020-11-07 06:42:33,671 INFO L226 Difference]: Without dead ends: 489 [2020-11-07 06:42:33,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15602 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=6787, Invalid=42719, Unknown=0, NotChecked=0, Total=49506 [2020-11-07 06:42:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-11-07 06:42:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 486. [2020-11-07 06:42:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-11-07 06:42:33,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 507 transitions. [2020-11-07 06:42:33,906 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 507 transitions. Word has length 437 [2020-11-07 06:42:33,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:33,906 INFO L481 AbstractCegarLoop]: Abstraction has 486 states and 507 transitions. [2020-11-07 06:42:33,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-11-07 06:42:33,906 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 507 transitions. [2020-11-07 06:42:33,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-11-07 06:42:33,908 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:33,908 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:33,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-11-07 06:42:33,909 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:33,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:33,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1589788828, now seen corresponding path program 46 times [2020-11-07 06:42:33,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:33,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080201714] [2020-11-07 06:42:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:37,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2140 backedges. 953 proven. 543 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2020-11-07 06:42:38,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080201714] [2020-11-07 06:42:38,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:38,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-11-07 06:42:38,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255818342] [2020-11-07 06:42:38,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-11-07 06:42:38,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:38,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-11-07 06:42:38,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=2765, Unknown=0, NotChecked=0, Total=3192 [2020-11-07 06:42:38,192 INFO L87 Difference]: Start difference. First operand 486 states and 507 transitions. Second operand 57 states. [2020-11-07 06:42:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:54,937 INFO L93 Difference]: Finished difference Result 2003 states and 2135 transitions. [2020-11-07 06:42:54,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-11-07 06:42:54,941 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 437 [2020-11-07 06:42:54,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:54,945 INFO L225 Difference]: With dead ends: 2003 [2020-11-07 06:42:54,945 INFO L226 Difference]: Without dead ends: 1713 [2020-11-07 06:42:54,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6255 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=3692, Invalid=19870, Unknown=0, NotChecked=0, Total=23562 [2020-11-07 06:42:54,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2020-11-07 06:42:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 750. [2020-11-07 06:42:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2020-11-07 06:42:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 790 transitions. [2020-11-07 06:42:55,519 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 790 transitions. Word has length 437 [2020-11-07 06:42:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:55,519 INFO L481 AbstractCegarLoop]: Abstraction has 750 states and 790 transitions. [2020-11-07 06:42:55,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-11-07 06:42:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 790 transitions. [2020-11-07 06:42:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2020-11-07 06:42:55,522 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:55,522 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:55,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-11-07 06:42:55,522 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:55,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:55,523 INFO L82 PathProgramCache]: Analyzing trace with hash -491703604, now seen corresponding path program 47 times [2020-11-07 06:42:55,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:55,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331214833] [2020-11-07 06:42:55,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:00,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2220 backedges. 507 proven. 561 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-11-07 06:43:00,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331214833] [2020-11-07 06:43:00,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:00,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-11-07 06:43:00,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914525057] [2020-11-07 06:43:00,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-11-07 06:43:00,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:00,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-11-07 06:43:00,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2941, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 06:43:00,174 INFO L87 Difference]: Start difference. First operand 750 states and 790 transitions. Second operand 59 states. [2020-11-07 06:43:14,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:14,625 INFO L93 Difference]: Finished difference Result 1205 states and 1281 transitions. [2020-11-07 06:43:14,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-11-07 06:43:14,629 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 443 [2020-11-07 06:43:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:14,631 INFO L225 Difference]: With dead ends: 1205 [2020-11-07 06:43:14,632 INFO L226 Difference]: Without dead ends: 980 [2020-11-07 06:43:14,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7968 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=5083, Invalid=21323, Unknown=0, NotChecked=0, Total=26406 [2020-11-07 06:43:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-11-07 06:43:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 756. [2020-11-07 06:43:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 756 states. [2020-11-07 06:43:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 796 transitions. [2020-11-07 06:43:15,112 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 796 transitions. Word has length 443 [2020-11-07 06:43:15,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:15,112 INFO L481 AbstractCegarLoop]: Abstraction has 756 states and 796 transitions. [2020-11-07 06:43:15,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-11-07 06:43:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 796 transitions. [2020-11-07 06:43:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-11-07 06:43:15,114 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:15,115 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:15,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-11-07 06:43:15,115 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1302696404, now seen corresponding path program 48 times [2020-11-07 06:43:15,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:15,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820283928] [2020-11-07 06:43:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:20,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 965 proven. 692 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2020-11-07 06:43:20,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820283928] [2020-11-07 06:43:20,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:20,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-11-07 06:43:20,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147278908] [2020-11-07 06:43:20,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-11-07 06:43:20,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:20,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-11-07 06:43:20,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=3219, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 06:43:20,273 INFO L87 Difference]: Start difference. First operand 756 states and 796 transitions. Second operand 61 states. [2020-11-07 06:43:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:50,804 INFO L93 Difference]: Finished difference Result 2418 states and 2579 transitions. [2020-11-07 06:43:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2020-11-07 06:43:50,809 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 449 [2020-11-07 06:43:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:50,813 INFO L225 Difference]: With dead ends: 2418 [2020-11-07 06:43:50,814 INFO L226 Difference]: Without dead ends: 2128 [2020-11-07 06:43:50,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13974 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=6251, Invalid=38905, Unknown=0, NotChecked=0, Total=45156 [2020-11-07 06:43:50,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2020-11-07 06:43:51,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 876. [2020-11-07 06:43:51,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2020-11-07 06:43:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 925 transitions. [2020-11-07 06:43:51,688 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 925 transitions. Word has length 449 [2020-11-07 06:43:51,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:51,689 INFO L481 AbstractCegarLoop]: Abstraction has 876 states and 925 transitions. [2020-11-07 06:43:51,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-11-07 06:43:51,689 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 925 transitions. [2020-11-07 06:43:51,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-11-07 06:43:51,692 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:51,692 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:51,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-11-07 06:43:51,692 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:51,693 INFO L82 PathProgramCache]: Analyzing trace with hash 964890004, now seen corresponding path program 49 times [2020-11-07 06:43:51,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:51,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462914355] [2020-11-07 06:43:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:57,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 511 proven. 1065 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2020-11-07 06:43:57,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462914355] [2020-11-07 06:43:57,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:57,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-11-07 06:43:57,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142390314] [2020-11-07 06:43:57,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-07 06:43:57,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:57,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-07 06:43:57,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=3443, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 06:43:57,627 INFO L87 Difference]: Start difference. First operand 876 states and 925 transitions. Second operand 63 states. [2020-11-07 06:44:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:44:15,314 INFO L93 Difference]: Finished difference Result 1166 states and 1234 transitions. [2020-11-07 06:44:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-11-07 06:44:15,318 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 449 [2020-11-07 06:44:15,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:44:15,322 INFO L225 Difference]: With dead ends: 1166 [2020-11-07 06:44:15,322 INFO L226 Difference]: Without dead ends: 1158 [2020-11-07 06:44:15,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5359 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=4275, Invalid=18375, Unknown=0, NotChecked=0, Total=22650 [2020-11-07 06:44:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2020-11-07 06:44:16,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1101. [2020-11-07 06:44:16,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1101 states. [2020-11-07 06:44:16,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1169 transitions. [2020-11-07 06:44:16,460 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1169 transitions. Word has length 449 [2020-11-07 06:44:16,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:44:16,461 INFO L481 AbstractCegarLoop]: Abstraction has 1101 states and 1169 transitions. [2020-11-07 06:44:16,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-07 06:44:16,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1169 transitions. [2020-11-07 06:44:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-11-07 06:44:16,464 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:44:16,464 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:44:16,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-11-07 06:44:16,464 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:44:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:44:16,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1581199604, now seen corresponding path program 50 times [2020-11-07 06:44:16,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:44:16,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016244729] [2020-11-07 06:44:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:44:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:22,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:44:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 977 proven. 848 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2020-11-07 06:44:22,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016244729] [2020-11-07 06:44:22,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:44:22,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-11-07 06:44:22,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240375861] [2020-11-07 06:44:22,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-11-07 06:44:22,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:44:22,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-11-07 06:44:22,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=3581, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 06:44:22,777 INFO L87 Difference]: Start difference. First operand 1101 states and 1169 transitions. Second operand 64 states. [2020-11-07 06:45:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:45:05,229 INFO L93 Difference]: Finished difference Result 3005 states and 3211 transitions. [2020-11-07 06:45:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2020-11-07 06:45:05,235 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 461 [2020-11-07 06:45:05,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:45:05,238 INFO L225 Difference]: With dead ends: 3005 [2020-11-07 06:45:05,238 INFO L226 Difference]: Without dead ends: 513 [2020-11-07 06:45:05,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18355 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=7880, Invalid=49960, Unknown=0, NotChecked=0, Total=57840 [2020-11-07 06:45:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2020-11-07 06:45:05,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 510. [2020-11-07 06:45:05,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2020-11-07 06:45:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 532 transitions. [2020-11-07 06:45:05,683 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 532 transitions. Word has length 461 [2020-11-07 06:45:05,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:45:05,683 INFO L481 AbstractCegarLoop]: Abstraction has 510 states and 532 transitions. [2020-11-07 06:45:05,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-11-07 06:45:05,683 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 532 transitions. [2020-11-07 06:45:05,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-11-07 06:45:05,685 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:45:05,686 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:45:05,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-11-07 06:45:05,686 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:45:05,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:45:05,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2106877020, now seen corresponding path program 51 times [2020-11-07 06:45:05,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:45:05,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238292891] [2020-11-07 06:45:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:45:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:11,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:45:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2461 backedges. 1110 proven. 627 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2020-11-07 06:45:12,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238292891] [2020-11-07 06:45:12,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:45:12,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-11-07 06:45:12,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330329953] [2020-11-07 06:45:12,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-11-07 06:45:12,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:45:12,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-11-07 06:45:12,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=3173, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 06:45:12,102 INFO L87 Difference]: Start difference. First operand 510 states and 532 transitions. Second operand 61 states. [2020-11-07 06:45:38,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:45:38,498 INFO L93 Difference]: Finished difference Result 2221 states and 2369 transitions. [2020-11-07 06:45:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2020-11-07 06:45:38,504 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 461 [2020-11-07 06:45:38,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:45:38,508 INFO L225 Difference]: With dead ends: 2221 [2020-11-07 06:45:38,508 INFO L226 Difference]: Without dead ends: 1910 [2020-11-07 06:45:38,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7321 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=4277, Invalid=23113, Unknown=0, NotChecked=0, Total=27390 [2020-11-07 06:45:38,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2020-11-07 06:45:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 800. [2020-11-07 06:45:39,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2020-11-07 06:45:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 843 transitions. [2020-11-07 06:45:39,174 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 843 transitions. Word has length 461 [2020-11-07 06:45:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:45:39,175 INFO L481 AbstractCegarLoop]: Abstraction has 800 states and 843 transitions. [2020-11-07 06:45:39,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-11-07 06:45:39,175 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 843 transitions. [2020-11-07 06:45:39,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-11-07 06:45:39,178 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:45:39,178 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:45:39,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-11-07 06:45:39,178 INFO L429 AbstractCegarLoop]: === Iteration 79 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:45:39,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:45:39,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1136779324, now seen corresponding path program 52 times [2020-11-07 06:45:39,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:45:39,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597293045] [2020-11-07 06:45:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:45:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:46,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:45:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2547 backedges. 588 proven. 646 refuted. 0 times theorem prover too weak. 1313 trivial. 0 not checked. [2020-11-07 06:45:46,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597293045] [2020-11-07 06:45:46,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:45:46,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-11-07 06:45:46,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609598434] [2020-11-07 06:45:46,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-07 06:45:46,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:45:46,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-07 06:45:46,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=3361, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 06:45:46,634 INFO L87 Difference]: Start difference. First operand 800 states and 843 transitions. Second operand 63 states. [2020-11-07 06:46:08,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:46:08,554 INFO L93 Difference]: Finished difference Result 1279 states and 1360 transitions. [2020-11-07 06:46:08,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-11-07 06:46:08,559 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 467 [2020-11-07 06:46:08,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:46:08,561 INFO L225 Difference]: With dead ends: 1279 [2020-11-07 06:46:08,562 INFO L226 Difference]: Without dead ends: 1042 [2020-11-07 06:46:08,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9259 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=5858, Invalid=24592, Unknown=0, NotChecked=0, Total=30450 [2020-11-07 06:46:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2020-11-07 06:46:09,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 806. [2020-11-07 06:46:09,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2020-11-07 06:46:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 849 transitions. [2020-11-07 06:46:09,214 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 849 transitions. Word has length 467 [2020-11-07 06:46:09,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:46:09,214 INFO L481 AbstractCegarLoop]: Abstraction has 806 states and 849 transitions. [2020-11-07 06:46:09,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-07 06:46:09,214 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 849 transitions. [2020-11-07 06:46:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-11-07 06:46:09,217 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:46:09,218 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:46:09,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-11-07 06:46:09,218 INFO L429 AbstractCegarLoop]: === Iteration 80 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:46:09,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:46:09,218 INFO L82 PathProgramCache]: Analyzing trace with hash 99704612, now seen corresponding path program 53 times [2020-11-07 06:46:09,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:46:09,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345437418] [2020-11-07 06:46:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:46:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:17,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:46:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2634 backedges. 1122 proven. 788 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2020-11-07 06:46:17,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345437418] [2020-11-07 06:46:17,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:46:17,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-11-07 06:46:17,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234204487] [2020-11-07 06:46:17,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-11-07 06:46:17,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:46:17,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-11-07 06:46:17,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=3659, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 06:46:17,327 INFO L87 Difference]: Start difference. First operand 806 states and 849 transitions. Second operand 65 states. [2020-11-07 06:47:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:47:07,730 INFO L93 Difference]: Finished difference Result 2675 states and 2855 transitions. [2020-11-07 06:47:07,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-11-07 06:47:07,738 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 473 [2020-11-07 06:47:07,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:47:07,746 INFO L225 Difference]: With dead ends: 2675 [2020-11-07 06:47:07,747 INFO L226 Difference]: Without dead ends: 2364 [2020-11-07 06:47:07,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16251 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=7206, Invalid=45006, Unknown=0, NotChecked=0, Total=52212 [2020-11-07 06:47:07,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2020-11-07 06:47:09,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 938. [2020-11-07 06:47:09,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-11-07 06:47:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 991 transitions. [2020-11-07 06:47:09,152 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 991 transitions. Word has length 473 [2020-11-07 06:47:09,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:47:09,152 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 991 transitions. [2020-11-07 06:47:09,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-11-07 06:47:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 991 transitions. [2020-11-07 06:47:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-11-07 06:47:09,156 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:47:09,156 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:47:09,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-11-07 06:47:09,157 INFO L429 AbstractCegarLoop]: === Iteration 81 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:47:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:47:09,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1832495756, now seen corresponding path program 54 times [2020-11-07 06:47:09,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:47:09,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651946739] [2020-11-07 06:47:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:47:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:18,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:47:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2633 backedges. 592 proven. 1231 refuted. 0 times theorem prover too weak. 810 trivial. 0 not checked. [2020-11-07 06:47:18,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651946739] [2020-11-07 06:47:18,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:47:18,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-11-07 06:47:18,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619579257] [2020-11-07 06:47:18,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-11-07 06:47:18,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:47:18,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-11-07 06:47:18,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=3897, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 06:47:18,438 INFO L87 Difference]: Start difference. First operand 938 states and 991 transitions. Second operand 67 states. [2020-11-07 06:47:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:47:48,410 INFO L93 Difference]: Finished difference Result 1244 states and 1317 transitions. [2020-11-07 06:47:48,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-11-07 06:47:48,417 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 473 [2020-11-07 06:47:48,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:47:48,420 INFO L225 Difference]: With dead ends: 1244 [2020-11-07 06:47:48,420 INFO L226 Difference]: Without dead ends: 1236 [2020-11-07 06:47:48,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6125 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=4878, Invalid=20882, Unknown=0, NotChecked=0, Total=25760 [2020-11-07 06:47:48,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2020-11-07 06:47:49,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1175. [2020-11-07 06:47:49,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1175 states. [2020-11-07 06:47:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1248 transitions. [2020-11-07 06:47:49,925 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1248 transitions. Word has length 473 [2020-11-07 06:47:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:47:49,926 INFO L481 AbstractCegarLoop]: Abstraction has 1175 states and 1248 transitions. [2020-11-07 06:47:49,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-11-07 06:47:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1248 transitions. [2020-11-07 06:47:49,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-11-07 06:47:49,929 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:47:49,930 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:47:49,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-11-07 06:47:49,930 INFO L429 AbstractCegarLoop]: === Iteration 82 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:47:49,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:47:49,930 INFO L82 PathProgramCache]: Analyzing trace with hash 788819436, now seen corresponding path program 55 times [2020-11-07 06:47:49,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:47:49,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855481217] [2020-11-07 06:47:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:47:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:59,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:47:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 1134 proven. 956 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-11-07 06:47:59,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855481217] [2020-11-07 06:47:59,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:47:59,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-11-07 06:47:59,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536579128] [2020-11-07 06:47:59,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-11-07 06:47:59,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:47:59,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-11-07 06:47:59,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=4045, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 06:47:59,762 INFO L87 Difference]: Start difference. First operand 1175 states and 1248 transitions. Second operand 68 states. [2020-11-07 06:48:09,578 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2020-11-07 06:48:14,209 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2020-11-07 06:48:16,163 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2020-11-07 06:48:17,002 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2020-11-07 06:48:18,207 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2020-11-07 06:48:20,057 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2020-11-07 06:48:20,948 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2020-11-07 06:48:24,135 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2020-11-07 06:48:25,064 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2020-11-07 06:48:28,255 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14