/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:59:27,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:59:27,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:59:27,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:59:27,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:59:27,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:59:27,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:59:27,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:59:27,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:59:27,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:59:27,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:59:27,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:59:27,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:59:27,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:59:27,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:59:27,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:59:27,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:59:27,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:59:27,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:59:27,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:59:27,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:59:27,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:59:27,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:59:27,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:59:27,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:59:27,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:59:27,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:59:27,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:59:27,887 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:59:27,915 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:59:27,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:59:27,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:59:27,919 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:59:27,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:59:27,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:59:27,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:59:27,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:59:27,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:59:27,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:59:27,922 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:59:27,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:59:27,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:59:27,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:59:27,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:59:27,924 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:59:27,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:59:27,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:59:27,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:59:27,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:59:27,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:59:27,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:59:27,930 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:59:28,221 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:59:28,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:59:28,238 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:59:28,239 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:59:28,240 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:59:28,240 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-07-07 13:59:28,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ea5ae09/175fc74d8c614bac9d98307c08072b98/FLAG439efb7a4 [2020-07-07 13:59:28,744 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:59:28,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-07-07 13:59:28,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ea5ae09/175fc74d8c614bac9d98307c08072b98/FLAG439efb7a4 [2020-07-07 13:59:29,129 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ea5ae09/175fc74d8c614bac9d98307c08072b98 [2020-07-07 13:59:29,138 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:59:29,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:59:29,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:59:29,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:59:29,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:59:29,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:59:29" (1/1) ... [2020-07-07 13:59:29,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5030a0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:29, skipping insertion in model container [2020-07-07 13:59:29,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:59:29" (1/1) ... [2020-07-07 13:59:29,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:59:29,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:59:29,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:59:29,386 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:59:29,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:59:29,447 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:59:29,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:29 WrapperNode [2020-07-07 13:59:29,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:59:29,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:59:29,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:59:29,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:59:29,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:29" (1/1) ... [2020-07-07 13:59:29,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:29" (1/1) ... [2020-07-07 13:59:29,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:29" (1/1) ... [2020-07-07 13:59:29,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:29" (1/1) ... [2020-07-07 13:59:29,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:29" (1/1) ... [2020-07-07 13:59:29,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:29" (1/1) ... [2020-07-07 13:59:29,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:29" (1/1) ... [2020-07-07 13:59:29,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:59:29,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:59:29,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:59:29,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:59:29,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:29" (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 [2020-07-07 13:59:29,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:59:29,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:59:29,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:59:29,668 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:59:29,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:59:29,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:59:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:59:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:59:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:59:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:59:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:59:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:59:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:59:29,880 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:59:29,880 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 13:59:29,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:59:29 BoogieIcfgContainer [2020-07-07 13:59:29,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:59:29,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:59:29,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:59:29,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:59:29,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:59:29" (1/3) ... [2020-07-07 13:59:29,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2966840e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:59:29, skipping insertion in model container [2020-07-07 13:59:29,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:29" (2/3) ... [2020-07-07 13:59:29,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2966840e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:59:29, skipping insertion in model container [2020-07-07 13:59:29,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:59:29" (3/3) ... [2020-07-07 13:59:29,892 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-07-07 13:59:29,904 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:59:29,916 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:59:29,941 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:59:29,986 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:59:29,986 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:59:29,986 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:59:29,986 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:59:29,986 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:59:29,987 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:59:29,987 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:59:29,987 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:59:30,013 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-07 13:59:30,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 13:59:30,023 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:30,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:30,025 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:30,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:30,031 INFO L82 PathProgramCache]: Analyzing trace with hash -439118320, now seen corresponding path program 1 times [2020-07-07 13:59:30,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:30,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998935597] [2020-07-07 13:59:30,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:30,235 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:30,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998935597] [2020-07-07 13:59:30,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:30,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:59:30,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604553091] [2020-07-07 13:59:30,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:59:30,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:30,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:59:30,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:59:30,261 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-07-07 13:59:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:30,378 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-07-07 13:59:30,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:59:30,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-07 13:59:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:30,386 INFO L225 Difference]: With dead ends: 45 [2020-07-07 13:59:30,387 INFO L226 Difference]: Without dead ends: 21 [2020-07-07 13:59:30,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:59:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-07 13:59:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-07 13:59:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 13:59:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-07 13:59:30,427 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-07-07 13:59:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:30,428 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-07 13:59:30,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:59:30,428 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-07 13:59:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 13:59:30,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:30,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:30,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:59:30,430 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:30,430 INFO L82 PathProgramCache]: Analyzing trace with hash -696780679, now seen corresponding path program 1 times [2020-07-07 13:59:30,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:30,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970707107] [2020-07-07 13:59:30,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:30,533 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:30,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970707107] [2020-07-07 13:59:30,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:30,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:59:30,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896749562] [2020-07-07 13:59:30,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:59:30,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:30,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:59:30,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:59:30,542 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 4 states. [2020-07-07 13:59:30,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:30,598 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-07-07 13:59:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:59:30,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-07 13:59:30,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:30,600 INFO L225 Difference]: With dead ends: 31 [2020-07-07 13:59:30,601 INFO L226 Difference]: Without dead ends: 25 [2020-07-07 13:59:30,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:59:30,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-07 13:59:30,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-07-07 13:59:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-07 13:59:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-07-07 13:59:30,611 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-07-07 13:59:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:30,611 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-07-07 13:59:30,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:59:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-07-07 13:59:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 13:59:30,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:30,613 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] [2020-07-07 13:59:30,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:59:30,614 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:30,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:30,614 INFO L82 PathProgramCache]: Analyzing trace with hash 908018199, now seen corresponding path program 1 times [2020-07-07 13:59:30,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:30,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192459839] [2020-07-07 13:59:30,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:30,737 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:30,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192459839] [2020-07-07 13:59:30,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:30,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:59:30,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009999826] [2020-07-07 13:59:30,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:59:30,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:30,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:59:30,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:59:30,740 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2020-07-07 13:59:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:30,850 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-07-07 13:59:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:59:30,851 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-07 13:59:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:30,852 INFO L225 Difference]: With dead ends: 36 [2020-07-07 13:59:30,852 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 13:59:30,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:59:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 13:59:30,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-07 13:59:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 13:59:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-07 13:59:30,862 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-07-07 13:59:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:30,862 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-07 13:59:30,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:59:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-07 13:59:30,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 13:59:30,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:30,864 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:30,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:59:30,865 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:30,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:30,865 INFO L82 PathProgramCache]: Analyzing trace with hash 641420089, now seen corresponding path program 2 times [2020-07-07 13:59:30,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:30,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727290400] [2020-07-07 13:59:30,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:31,007 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:31,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727290400] [2020-07-07 13:59:31,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:31,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:59:31,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010939636] [2020-07-07 13:59:31,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:59:31,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:31,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:59:31,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:59:31,012 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-07-07 13:59:31,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:31,179 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-07-07 13:59:31,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 13:59:31,180 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-07-07 13:59:31,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:31,181 INFO L225 Difference]: With dead ends: 41 [2020-07-07 13:59:31,181 INFO L226 Difference]: Without dead ends: 35 [2020-07-07 13:59:31,182 INFO L675 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 [2020-07-07 13:59:31,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-07 13:59:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-07 13:59:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 13:59:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-07-07 13:59:31,191 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-07-07 13:59:31,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:31,191 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-07-07 13:59:31,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:59:31,191 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-07-07 13:59:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 13:59:31,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:31,193 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:31,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:59:31,193 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:31,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:31,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2101454679, now seen corresponding path program 3 times [2020-07-07 13:59:31,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:31,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623045567] [2020-07-07 13:59:31,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:31,305 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:31,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623045567] [2020-07-07 13:59:31,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:31,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 13:59:31,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097633521] [2020-07-07 13:59:31,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 13:59:31,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:31,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 13:59:31,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:59:31,308 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 10 states. [2020-07-07 13:59:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:31,439 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-07-07 13:59:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 13:59:31,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-07 13:59:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:31,441 INFO L225 Difference]: With dead ends: 46 [2020-07-07 13:59:31,441 INFO L226 Difference]: Without dead ends: 40 [2020-07-07 13:59:31,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-07-07 13:59:31,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-07 13:59:31,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-07-07 13:59:31,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-07 13:59:31,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-07-07 13:59:31,450 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-07-07 13:59:31,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:31,451 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-07-07 13:59:31,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 13:59:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-07-07 13:59:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-07 13:59:31,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:31,453 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:31,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:59:31,453 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:31,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:31,454 INFO L82 PathProgramCache]: Analyzing trace with hash -888787463, now seen corresponding path program 4 times [2020-07-07 13:59:31,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:31,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090908578] [2020-07-07 13:59:31,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:31,616 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:31,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090908578] [2020-07-07 13:59:31,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:31,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 13:59:31,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382561153] [2020-07-07 13:59:31,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 13:59:31,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:31,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 13:59:31,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-07-07 13:59:31,619 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 12 states. [2020-07-07 13:59:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:31,810 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-07-07 13:59:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 13:59:31,811 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-07-07 13:59:31,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:31,812 INFO L225 Difference]: With dead ends: 51 [2020-07-07 13:59:31,812 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 13:59:31,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-07-07 13:59:31,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 13:59:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-07-07 13:59:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 13:59:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-07-07 13:59:31,828 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-07-07 13:59:31,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:31,830 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-07-07 13:59:31,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 13:59:31,830 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-07-07 13:59:31,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-07 13:59:31,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:31,834 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:31,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:59:31,839 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:31,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:31,840 INFO L82 PathProgramCache]: Analyzing trace with hash 899054743, now seen corresponding path program 5 times [2020-07-07 13:59:31,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:31,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293049045] [2020-07-07 13:59:31,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:32,055 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:32,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293049045] [2020-07-07 13:59:32,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:32,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-07 13:59:32,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721154651] [2020-07-07 13:59:32,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 13:59:32,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:32,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 13:59:32,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-07-07 13:59:32,059 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 14 states. [2020-07-07 13:59:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:32,272 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-07-07 13:59:32,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 13:59:32,273 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-07-07 13:59:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:32,274 INFO L225 Difference]: With dead ends: 56 [2020-07-07 13:59:32,274 INFO L226 Difference]: Without dead ends: 50 [2020-07-07 13:59:32,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-07-07 13:59:32,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-07 13:59:32,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-07-07 13:59:32,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-07 13:59:32,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-07-07 13:59:32,282 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-07-07 13:59:32,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:32,283 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-07-07 13:59:32,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 13:59:32,283 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-07-07 13:59:32,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-07 13:59:32,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:32,284 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:32,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 13:59:32,285 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:32,285 INFO L82 PathProgramCache]: Analyzing trace with hash 212115641, now seen corresponding path program 6 times [2020-07-07 13:59:32,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:32,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193389599] [2020-07-07 13:59:32,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:32,453 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:32,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193389599] [2020-07-07 13:59:32,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:32,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-07-07 13:59:32,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447862545] [2020-07-07 13:59:32,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 13:59:32,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:32,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 13:59:32,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-07-07 13:59:32,456 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2020-07-07 13:59:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:32,752 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-07-07 13:59:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 13:59:32,752 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-07-07 13:59:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:32,753 INFO L225 Difference]: With dead ends: 61 [2020-07-07 13:59:32,753 INFO L226 Difference]: Without dead ends: 55 [2020-07-07 13:59:32,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-07-07 13:59:32,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-07 13:59:32,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-07-07 13:59:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-07 13:59:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-07-07 13:59:32,768 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-07-07 13:59:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:32,768 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-07-07 13:59:32,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 13:59:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-07-07 13:59:32,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-07 13:59:32,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:32,770 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:32,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 13:59:32,770 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:32,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:32,771 INFO L82 PathProgramCache]: Analyzing trace with hash 382845399, now seen corresponding path program 7 times [2020-07-07 13:59:32,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:32,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258334530] [2020-07-07 13:59:32,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:32,988 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:32,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258334530] [2020-07-07 13:59:32,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:32,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-07 13:59:32,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374185235] [2020-07-07 13:59:32,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 13:59:32,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:32,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 13:59:32,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-07-07 13:59:32,991 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 18 states. [2020-07-07 13:59:33,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:33,307 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-07-07 13:59:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-07 13:59:33,308 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-07-07 13:59:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:33,310 INFO L225 Difference]: With dead ends: 66 [2020-07-07 13:59:33,310 INFO L226 Difference]: Without dead ends: 60 [2020-07-07 13:59:33,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-07-07 13:59:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-07 13:59:33,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-07-07 13:59:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 13:59:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-07-07 13:59:33,318 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-07-07 13:59:33,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:33,318 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-07-07 13:59:33,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 13:59:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-07-07 13:59:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-07 13:59:33,320 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:33,320 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:33,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 13:59:33,320 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:33,321 INFO L82 PathProgramCache]: Analyzing trace with hash -471686279, now seen corresponding path program 8 times [2020-07-07 13:59:33,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:33,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616355123] [2020-07-07 13:59:33,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:33,559 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:33,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616355123] [2020-07-07 13:59:33,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:33,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-07-07 13:59:33,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110797916] [2020-07-07 13:59:33,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 13:59:33,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:33,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 13:59:33,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-07-07 13:59:33,562 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 20 states. [2020-07-07 13:59:33,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:33,963 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-07-07 13:59:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 13:59:33,964 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-07-07 13:59:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:33,965 INFO L225 Difference]: With dead ends: 71 [2020-07-07 13:59:33,965 INFO L226 Difference]: Without dead ends: 65 [2020-07-07 13:59:33,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 13:59:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-07 13:59:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-07-07 13:59:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-07 13:59:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-07-07 13:59:33,982 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-07-07 13:59:33,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:33,982 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-07-07 13:59:33,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 13:59:33,984 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-07-07 13:59:33,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-07 13:59:33,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:33,985 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:33,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 13:59:33,986 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:33,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:33,986 INFO L82 PathProgramCache]: Analyzing trace with hash -945326313, now seen corresponding path program 9 times [2020-07-07 13:59:33,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:33,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567131737] [2020-07-07 13:59:33,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:34,231 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:34,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567131737] [2020-07-07 13:59:34,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:34,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-07-07 13:59:34,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472663819] [2020-07-07 13:59:34,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 13:59:34,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:34,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 13:59:34,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-07-07 13:59:34,234 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2020-07-07 13:59:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:34,639 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-07-07 13:59:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-07 13:59:34,640 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-07-07 13:59:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:34,641 INFO L225 Difference]: With dead ends: 76 [2020-07-07 13:59:34,641 INFO L226 Difference]: Without dead ends: 70 [2020-07-07 13:59:34,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-07-07 13:59:34,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-07 13:59:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-07-07 13:59:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-07 13:59:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-07-07 13:59:34,650 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-07-07 13:59:34,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:34,650 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-07-07 13:59:34,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 13:59:34,650 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-07-07 13:59:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-07 13:59:34,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:34,652 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:34,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 13:59:34,652 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:34,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:34,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1165216199, now seen corresponding path program 10 times [2020-07-07 13:59:34,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:34,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554382345] [2020-07-07 13:59:34,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:34,958 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:34,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554382345] [2020-07-07 13:59:34,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:34,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-07-07 13:59:34,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379011952] [2020-07-07 13:59:34,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 13:59:34,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:34,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 13:59:34,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-07-07 13:59:34,961 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 24 states. [2020-07-07 13:59:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:35,441 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-07-07 13:59:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-07 13:59:35,442 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-07-07 13:59:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:35,442 INFO L225 Difference]: With dead ends: 81 [2020-07-07 13:59:35,443 INFO L226 Difference]: Without dead ends: 75 [2020-07-07 13:59:35,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-07-07 13:59:35,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-07 13:59:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-07-07 13:59:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-07 13:59:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-07-07 13:59:35,452 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 66 [2020-07-07 13:59:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:35,452 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-07-07 13:59:35,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 13:59:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-07-07 13:59:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-07 13:59:35,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:35,454 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:35,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 13:59:35,454 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:35,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:35,455 INFO L82 PathProgramCache]: Analyzing trace with hash 499883095, now seen corresponding path program 11 times [2020-07-07 13:59:35,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:35,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869439270] [2020-07-07 13:59:35,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:35,744 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:35,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869439270] [2020-07-07 13:59:35,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:35,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-07-07 13:59:35,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811910013] [2020-07-07 13:59:35,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-07 13:59:35,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:35,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-07 13:59:35,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-07-07 13:59:35,751 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 26 states. [2020-07-07 13:59:36,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:36,302 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-07-07 13:59:36,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-07 13:59:36,302 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-07-07 13:59:36,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:36,303 INFO L225 Difference]: With dead ends: 86 [2020-07-07 13:59:36,304 INFO L226 Difference]: Without dead ends: 80 [2020-07-07 13:59:36,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-07-07 13:59:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-07 13:59:36,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-07-07 13:59:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-07 13:59:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-07-07 13:59:36,313 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 71 [2020-07-07 13:59:36,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:36,313 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-07-07 13:59:36,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-07 13:59:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-07-07 13:59:36,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-07 13:59:36,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:36,315 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:36,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 13:59:36,315 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:36,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:36,316 INFO L82 PathProgramCache]: Analyzing trace with hash 728586489, now seen corresponding path program 12 times [2020-07-07 13:59:36,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:36,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384652154] [2020-07-07 13:59:36,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:36,666 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:36,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384652154] [2020-07-07 13:59:36,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:36,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-07-07 13:59:36,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667535606] [2020-07-07 13:59:36,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-07 13:59:36,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:36,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-07 13:59:36,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-07-07 13:59:36,668 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 28 states. [2020-07-07 13:59:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:37,303 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-07-07 13:59:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-07 13:59:37,304 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 76 [2020-07-07 13:59:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:37,305 INFO L225 Difference]: With dead ends: 91 [2020-07-07 13:59:37,305 INFO L226 Difference]: Without dead ends: 85 [2020-07-07 13:59:37,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-07-07 13:59:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-07 13:59:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-07-07 13:59:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-07 13:59:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-07-07 13:59:37,315 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 76 [2020-07-07 13:59:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:37,315 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-07-07 13:59:37,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-07 13:59:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-07-07 13:59:37,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-07 13:59:37,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:37,316 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:37,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 13:59:37,317 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:37,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:37,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1576153495, now seen corresponding path program 13 times [2020-07-07 13:59:37,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:37,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891192149] [2020-07-07 13:59:37,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:37,710 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:37,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891192149] [2020-07-07 13:59:37,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:37,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-07-07 13:59:37,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674547644] [2020-07-07 13:59:37,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-07 13:59:37,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:37,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-07 13:59:37,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-07-07 13:59:37,713 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 30 states. [2020-07-07 13:59:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:38,407 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-07-07 13:59:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-07 13:59:38,408 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 81 [2020-07-07 13:59:38,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:38,409 INFO L225 Difference]: With dead ends: 96 [2020-07-07 13:59:38,409 INFO L226 Difference]: Without dead ends: 90 [2020-07-07 13:59:38,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-07-07 13:59:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-07 13:59:38,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-07-07 13:59:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-07 13:59:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-07-07 13:59:38,417 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 81 [2020-07-07 13:59:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:38,418 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-07-07 13:59:38,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-07 13:59:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-07-07 13:59:38,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-07 13:59:38,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:38,419 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:38,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 13:59:38,420 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:38,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1034810439, now seen corresponding path program 14 times [2020-07-07 13:59:38,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:38,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888277334] [2020-07-07 13:59:38,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:38,893 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:38,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888277334] [2020-07-07 13:59:38,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:38,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-07-07 13:59:38,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954107114] [2020-07-07 13:59:38,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-07 13:59:38,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:38,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-07 13:59:38,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-07-07 13:59:38,896 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 32 states. [2020-07-07 13:59:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:39,753 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-07-07 13:59:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-07 13:59:39,756 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 86 [2020-07-07 13:59:39,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:39,757 INFO L225 Difference]: With dead ends: 101 [2020-07-07 13:59:39,757 INFO L226 Difference]: Without dead ends: 95 [2020-07-07 13:59:39,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-07-07 13:59:39,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-07 13:59:39,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-07-07 13:59:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-07 13:59:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-07-07 13:59:39,766 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 86 [2020-07-07 13:59:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:39,766 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-07-07 13:59:39,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-07 13:59:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-07-07 13:59:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-07 13:59:39,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:39,767 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:39,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 13:59:39,768 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:39,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:39,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2077177559, now seen corresponding path program 15 times [2020-07-07 13:59:39,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:39,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377772448] [2020-07-07 13:59:39,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:40,293 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:40,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377772448] [2020-07-07 13:59:40,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:40,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-07-07 13:59:40,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647702644] [2020-07-07 13:59:40,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-07 13:59:40,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:40,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-07 13:59:40,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-07-07 13:59:40,297 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 34 states. [2020-07-07 13:59:41,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:41,427 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-07-07 13:59:41,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-07 13:59:41,427 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 91 [2020-07-07 13:59:41,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:41,429 INFO L225 Difference]: With dead ends: 106 [2020-07-07 13:59:41,429 INFO L226 Difference]: Without dead ends: 100 [2020-07-07 13:59:41,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-07-07 13:59:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-07 13:59:41,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-07-07 13:59:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-07 13:59:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-07-07 13:59:41,442 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 91 [2020-07-07 13:59:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:41,443 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-07-07 13:59:41,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-07 13:59:41,443 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-07-07 13:59:41,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-07 13:59:41,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:41,447 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:41,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 13:59:41,449 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:41,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:41,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1140437383, now seen corresponding path program 16 times [2020-07-07 13:59:41,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:41,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678842589] [2020-07-07 13:59:41,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:42,149 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:42,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678842589] [2020-07-07 13:59:42,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:42,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-07-07 13:59:42,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424144370] [2020-07-07 13:59:42,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-07 13:59:42,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:42,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-07 13:59:42,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 13:59:42,158 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 36 states. [2020-07-07 13:59:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:43,151 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-07-07 13:59:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-07-07 13:59:43,151 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 96 [2020-07-07 13:59:43,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:43,152 INFO L225 Difference]: With dead ends: 111 [2020-07-07 13:59:43,152 INFO L226 Difference]: Without dead ends: 105 [2020-07-07 13:59:43,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-07-07 13:59:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-07 13:59:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-07-07 13:59:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-07 13:59:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-07-07 13:59:43,160 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 96 [2020-07-07 13:59:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:43,160 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-07-07 13:59:43,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-07 13:59:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-07-07 13:59:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-07 13:59:43,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:43,161 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:43,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 13:59:43,162 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:43,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:43,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1511435287, now seen corresponding path program 17 times [2020-07-07 13:59:43,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:43,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365540525] [2020-07-07 13:59:43,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:43,822 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:43,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365540525] [2020-07-07 13:59:43,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:43,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-07-07 13:59:43,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550999565] [2020-07-07 13:59:43,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-07 13:59:43,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:43,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-07 13:59:43,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-07-07 13:59:43,825 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 38 states. [2020-07-07 13:59:44,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:44,983 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-07-07 13:59:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-07 13:59:44,984 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 101 [2020-07-07 13:59:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:44,985 INFO L225 Difference]: With dead ends: 116 [2020-07-07 13:59:44,985 INFO L226 Difference]: Without dead ends: 110 [2020-07-07 13:59:44,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-07-07 13:59:44,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-07 13:59:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-07-07 13:59:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-07 13:59:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-07 13:59:44,995 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 101 [2020-07-07 13:59:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:44,996 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-07 13:59:44,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-07 13:59:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-07 13:59:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-07 13:59:44,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:44,997 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:44,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 13:59:44,998 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:44,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:44,999 INFO L82 PathProgramCache]: Analyzing trace with hash -967433927, now seen corresponding path program 18 times [2020-07-07 13:59:44,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:44,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112071833] [2020-07-07 13:59:44,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:45,739 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:45,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112071833] [2020-07-07 13:59:45,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:45,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-07-07 13:59:45,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975524965] [2020-07-07 13:59:45,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-07 13:59:45,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:45,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-07 13:59:45,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-07-07 13:59:45,742 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 40 states. [2020-07-07 13:59:46,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:46,944 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2020-07-07 13:59:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-07-07 13:59:46,945 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 106 [2020-07-07 13:59:46,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:46,947 INFO L225 Difference]: With dead ends: 121 [2020-07-07 13:59:46,947 INFO L226 Difference]: Without dead ends: 115 [2020-07-07 13:59:46,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-07-07 13:59:46,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-07 13:59:46,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-07-07 13:59:46,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-07 13:59:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-07-07 13:59:46,955 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 106 [2020-07-07 13:59:46,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:46,955 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-07-07 13:59:46,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-07 13:59:46,956 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-07-07 13:59:46,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-07-07 13:59:46,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:46,957 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:46,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 13:59:46,957 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:46,958 INFO L82 PathProgramCache]: Analyzing trace with hash 175935831, now seen corresponding path program 19 times [2020-07-07 13:59:46,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:46,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858530626] [2020-07-07 13:59:46,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:47,645 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:47,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858530626] [2020-07-07 13:59:47,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:47,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-07-07 13:59:47,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789851582] [2020-07-07 13:59:47,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-07 13:59:47,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:47,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-07 13:59:47,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-07-07 13:59:47,648 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 42 states. [2020-07-07 13:59:48,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:48,799 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-07-07 13:59:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-07 13:59:48,807 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 111 [2020-07-07 13:59:48,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:48,808 INFO L225 Difference]: With dead ends: 126 [2020-07-07 13:59:48,808 INFO L226 Difference]: Without dead ends: 120 [2020-07-07 13:59:48,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-07-07 13:59:48,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-07 13:59:48,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-07-07 13:59:48,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-07 13:59:48,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-07-07 13:59:48,816 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 111 [2020-07-07 13:59:48,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:48,816 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-07-07 13:59:48,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-07 13:59:48,816 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-07-07 13:59:48,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-07-07 13:59:48,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:48,817 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:48,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 13:59:48,818 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:48,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:48,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1072856071, now seen corresponding path program 20 times [2020-07-07 13:59:48,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:48,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372743414] [2020-07-07 13:59:48,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:49,607 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:49,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372743414] [2020-07-07 13:59:49,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:49,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-07-07 13:59:49,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952984939] [2020-07-07 13:59:49,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-07 13:59:49,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:49,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-07 13:59:49,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-07-07 13:59:49,611 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 44 states. [2020-07-07 13:59:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:50,950 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2020-07-07 13:59:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-07-07 13:59:50,952 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 116 [2020-07-07 13:59:50,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:50,953 INFO L225 Difference]: With dead ends: 131 [2020-07-07 13:59:50,954 INFO L226 Difference]: Without dead ends: 125 [2020-07-07 13:59:50,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-07-07 13:59:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-07 13:59:50,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-07-07 13:59:50,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-07 13:59:50,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-07-07 13:59:50,961 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 116 [2020-07-07 13:59:50,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:50,961 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-07-07 13:59:50,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-07 13:59:50,962 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-07-07 13:59:50,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-07 13:59:50,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:50,962 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:50,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-07 13:59:50,963 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:50,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:50,963 INFO L82 PathProgramCache]: Analyzing trace with hash 229959319, now seen corresponding path program 21 times [2020-07-07 13:59:50,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:50,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500040352] [2020-07-07 13:59:50,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:51,819 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:51,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500040352] [2020-07-07 13:59:51,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:51,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-07-07 13:59:51,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470989852] [2020-07-07 13:59:51,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-07 13:59:51,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:51,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-07 13:59:51,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-07-07 13:59:51,828 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 46 states. [2020-07-07 13:59:53,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:53,304 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-07-07 13:59:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-07 13:59:53,305 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 121 [2020-07-07 13:59:53,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:53,306 INFO L225 Difference]: With dead ends: 136 [2020-07-07 13:59:53,306 INFO L226 Difference]: Without dead ends: 130 [2020-07-07 13:59:53,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-07-07 13:59:53,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-07 13:59:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-07-07 13:59:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-07-07 13:59:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-07-07 13:59:53,314 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 121 [2020-07-07 13:59:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:53,315 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-07-07 13:59:53,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-07 13:59:53,315 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-07-07 13:59:53,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-07 13:59:53,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:53,317 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:53,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-07 13:59:53,317 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:53,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2029549241, now seen corresponding path program 22 times [2020-07-07 13:59:53,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:53,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631503823] [2020-07-07 13:59:53,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:54,210 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:54,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631503823] [2020-07-07 13:59:54,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:54,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-07-07 13:59:54,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095535292] [2020-07-07 13:59:54,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-07 13:59:54,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:54,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-07 13:59:54,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-07-07 13:59:54,211 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 48 states. [2020-07-07 13:59:55,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:55,832 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2020-07-07 13:59:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-07-07 13:59:55,833 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 126 [2020-07-07 13:59:55,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:55,835 INFO L225 Difference]: With dead ends: 141 [2020-07-07 13:59:55,835 INFO L226 Difference]: Without dead ends: 135 [2020-07-07 13:59:55,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-07-07 13:59:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-07 13:59:55,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-07-07 13:59:55,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-07 13:59:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-07-07 13:59:55,841 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 126 [2020-07-07 13:59:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:55,842 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-07-07 13:59:55,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-07 13:59:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-07-07 13:59:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-07 13:59:55,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:55,843 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:55,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-07 13:59:55,843 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:55,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:55,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1821135913, now seen corresponding path program 23 times [2020-07-07 13:59:55,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:55,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073951658] [2020-07-07 13:59:55,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:56,860 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:56,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073951658] [2020-07-07 13:59:56,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:56,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-07-07 13:59:56,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194242838] [2020-07-07 13:59:56,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-07 13:59:56,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:56,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-07 13:59:56,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-07-07 13:59:56,861 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 50 states. [2020-07-07 13:59:58,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:58,614 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-07-07 13:59:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-07-07 13:59:58,614 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 131 [2020-07-07 13:59:58,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:58,616 INFO L225 Difference]: With dead ends: 146 [2020-07-07 13:59:58,616 INFO L226 Difference]: Without dead ends: 140 [2020-07-07 13:59:58,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-07-07 13:59:58,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-07 13:59:58,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-07-07 13:59:58,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-07 13:59:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-07-07 13:59:58,632 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 131 [2020-07-07 13:59:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:58,632 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-07-07 13:59:58,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-07 13:59:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-07-07 13:59:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-07 13:59:58,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:58,634 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:58,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-07 13:59:58,635 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:58,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:58,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1910700409, now seen corresponding path program 24 times [2020-07-07 13:59:58,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:58,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665452367] [2020-07-07 13:59:58,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:00,175 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:00,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665452367] [2020-07-07 14:00:00,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:00,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-07-07 14:00:00,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537648218] [2020-07-07 14:00:00,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-07 14:00:00,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:00,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-07 14:00:00,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-07-07 14:00:00,178 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 52 states. [2020-07-07 14:00:02,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:02,210 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2020-07-07 14:00:02,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-07-07 14:00:02,211 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 136 [2020-07-07 14:00:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:02,212 INFO L225 Difference]: With dead ends: 151 [2020-07-07 14:00:02,212 INFO L226 Difference]: Without dead ends: 145 [2020-07-07 14:00:02,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-07-07 14:00:02,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-07 14:00:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-07-07 14:00:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-07 14:00:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2020-07-07 14:00:02,221 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 136 [2020-07-07 14:00:02,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:02,221 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2020-07-07 14:00:02,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-07 14:00:02,221 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2020-07-07 14:00:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-07 14:00:02,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:02,222 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:02,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-07 14:00:02,223 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:02,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:02,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1167269609, now seen corresponding path program 25 times [2020-07-07 14:00:02,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:02,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668216971] [2020-07-07 14:00:02,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:03,695 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:03,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668216971] [2020-07-07 14:00:03,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:03,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-07-07 14:00:03,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043861987] [2020-07-07 14:00:03,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-07 14:00:03,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:03,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-07 14:00:03,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-07-07 14:00:03,697 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 54 states. [2020-07-07 14:00:05,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:05,706 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-07-07 14:00:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-07-07 14:00:05,707 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 141 [2020-07-07 14:00:05,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:05,709 INFO L225 Difference]: With dead ends: 156 [2020-07-07 14:00:05,709 INFO L226 Difference]: Without dead ends: 150 [2020-07-07 14:00:05,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-07-07 14:00:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-07 14:00:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-07-07 14:00:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-07 14:00:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-07-07 14:00:05,716 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 141 [2020-07-07 14:00:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:05,717 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-07-07 14:00:05,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-07 14:00:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-07-07 14:00:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-07 14:00:05,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:05,718 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:05,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-07 14:00:05,718 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:05,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:05,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1667691463, now seen corresponding path program 26 times [2020-07-07 14:00:05,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:05,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867517151] [2020-07-07 14:00:05,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:07,045 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:07,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867517151] [2020-07-07 14:00:07,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:07,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-07-07 14:00:07,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927496863] [2020-07-07 14:00:07,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-07 14:00:07,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:07,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-07 14:00:07,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-07-07 14:00:07,047 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 56 states. [2020-07-07 14:00:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:09,144 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2020-07-07 14:00:09,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-07-07 14:00:09,145 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 146 [2020-07-07 14:00:09,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:09,146 INFO L225 Difference]: With dead ends: 161 [2020-07-07 14:00:09,147 INFO L226 Difference]: Without dead ends: 155 [2020-07-07 14:00:09,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-07-07 14:00:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-07 14:00:09,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-07-07 14:00:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-07 14:00:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2020-07-07 14:00:09,157 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 146 [2020-07-07 14:00:09,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:09,157 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2020-07-07 14:00:09,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-07 14:00:09,158 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2020-07-07 14:00:09,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-07 14:00:09,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:09,159 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:09,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-07 14:00:09,159 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:09,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:09,159 INFO L82 PathProgramCache]: Analyzing trace with hash -799766953, now seen corresponding path program 27 times [2020-07-07 14:00:09,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:09,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506752986] [2020-07-07 14:00:09,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:10,602 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:10,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506752986] [2020-07-07 14:00:10,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:10,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-07-07 14:00:10,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596150720] [2020-07-07 14:00:10,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-07 14:00:10,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:10,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-07 14:00:10,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-07-07 14:00:10,604 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 58 states. [2020-07-07 14:00:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:12,945 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-07-07 14:00:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-07-07 14:00:12,946 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 151 [2020-07-07 14:00:12,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:12,948 INFO L225 Difference]: With dead ends: 166 [2020-07-07 14:00:12,948 INFO L226 Difference]: Without dead ends: 160 [2020-07-07 14:00:12,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-07-07 14:00:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-07 14:00:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-07-07 14:00:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-07 14:00:12,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-07-07 14:00:12,955 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 151 [2020-07-07 14:00:12,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:12,955 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-07-07 14:00:12,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-07 14:00:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-07-07 14:00:12,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-07-07 14:00:12,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:12,957 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:12,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-07 14:00:12,957 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:12,957 INFO L82 PathProgramCache]: Analyzing trace with hash 468102905, now seen corresponding path program 28 times [2020-07-07 14:00:12,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:12,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355944601] [2020-07-07 14:00:12,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:14,465 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:14,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355944601] [2020-07-07 14:00:14,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:14,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-07-07 14:00:14,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641823382] [2020-07-07 14:00:14,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-07 14:00:14,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:14,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-07 14:00:14,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-07-07 14:00:14,467 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 60 states. [2020-07-07 14:00:16,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:16,976 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2020-07-07 14:00:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-07-07 14:00:16,976 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 156 [2020-07-07 14:00:16,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:16,978 INFO L225 Difference]: With dead ends: 171 [2020-07-07 14:00:16,978 INFO L226 Difference]: Without dead ends: 165 [2020-07-07 14:00:16,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-07-07 14:00:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-07 14:00:16,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-07-07 14:00:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-07 14:00:16,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2020-07-07 14:00:16,986 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 156 [2020-07-07 14:00:16,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:16,986 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2020-07-07 14:00:16,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-07 14:00:16,987 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2020-07-07 14:00:16,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-07 14:00:16,987 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:16,988 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:16,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-07 14:00:16,988 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:16,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:16,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1847682153, now seen corresponding path program 29 times [2020-07-07 14:00:16,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:16,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294427460] [2020-07-07 14:00:16,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:18,704 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:18,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294427460] [2020-07-07 14:00:18,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:18,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-07-07 14:00:18,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855620838] [2020-07-07 14:00:18,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-07 14:00:18,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:18,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-07 14:00:18,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-07-07 14:00:18,706 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 62 states. [2020-07-07 14:00:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:21,388 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2020-07-07 14:00:21,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-07-07 14:00:21,390 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 161 [2020-07-07 14:00:21,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:21,391 INFO L225 Difference]: With dead ends: 176 [2020-07-07 14:00:21,391 INFO L226 Difference]: Without dead ends: 170 [2020-07-07 14:00:21,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-07-07 14:00:21,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-07 14:00:21,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-07-07 14:00:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-07-07 14:00:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-07-07 14:00:21,398 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 161 [2020-07-07 14:00:21,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:21,399 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-07-07 14:00:21,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-07 14:00:21,399 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-07-07 14:00:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-07-07 14:00:21,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:21,400 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:21,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-07 14:00:21,401 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:21,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:21,401 INFO L82 PathProgramCache]: Analyzing trace with hash 60285369, now seen corresponding path program 30 times [2020-07-07 14:00:21,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:21,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038562036] [2020-07-07 14:00:21,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:23,216 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:23,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038562036] [2020-07-07 14:00:23,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:23,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-07-07 14:00:23,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368457867] [2020-07-07 14:00:23,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-07 14:00:23,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:23,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-07 14:00:23,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-07-07 14:00:23,218 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 64 states. [2020-07-07 14:00:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:25,996 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2020-07-07 14:00:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-07-07 14:00:25,996 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 166 [2020-07-07 14:00:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:25,998 INFO L225 Difference]: With dead ends: 181 [2020-07-07 14:00:25,998 INFO L226 Difference]: Without dead ends: 175 [2020-07-07 14:00:25,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-07-07 14:00:26,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-07 14:00:26,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-07-07 14:00:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-07 14:00:26,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2020-07-07 14:00:26,006 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 166 [2020-07-07 14:00:26,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:26,006 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2020-07-07 14:00:26,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-07 14:00:26,006 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2020-07-07 14:00:26,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-07-07 14:00:26,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:26,008 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:26,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-07 14:00:26,008 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:26,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:26,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1790910679, now seen corresponding path program 31 times [2020-07-07 14:00:26,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:26,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111717028] [2020-07-07 14:00:26,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:27,895 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:27,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111717028] [2020-07-07 14:00:27,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:27,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-07-07 14:00:27,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943765104] [2020-07-07 14:00:27,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-07 14:00:27,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:27,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-07 14:00:27,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-07-07 14:00:27,897 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 66 states. [2020-07-07 14:00:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:30,894 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2020-07-07 14:00:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-07-07 14:00:30,894 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 171 [2020-07-07 14:00:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:30,896 INFO L225 Difference]: With dead ends: 186 [2020-07-07 14:00:30,896 INFO L226 Difference]: Without dead ends: 180 [2020-07-07 14:00:30,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-07-07 14:00:30,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-07-07 14:00:30,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-07-07 14:00:30,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-07 14:00:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-07-07 14:00:30,902 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 171 [2020-07-07 14:00:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:30,902 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-07-07 14:00:30,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-07 14:00:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-07-07 14:00:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-07-07 14:00:30,903 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:30,903 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:30,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-07-07 14:00:30,904 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:30,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:30,904 INFO L82 PathProgramCache]: Analyzing trace with hash 410559609, now seen corresponding path program 32 times [2020-07-07 14:00:30,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:30,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650820878] [2020-07-07 14:00:30,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:32,886 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:32,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650820878] [2020-07-07 14:00:32,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:32,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-07-07 14:00:32,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263396166] [2020-07-07 14:00:32,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-07 14:00:32,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:32,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-07 14:00:32,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-07-07 14:00:32,889 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 68 states. [2020-07-07 14:00:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:36,161 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2020-07-07 14:00:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-07-07 14:00:36,162 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 176 [2020-07-07 14:00:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:36,164 INFO L225 Difference]: With dead ends: 191 [2020-07-07 14:00:36,164 INFO L226 Difference]: Without dead ends: 185 [2020-07-07 14:00:36,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-07-07 14:00:36,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-07-07 14:00:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-07-07 14:00:36,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-07 14:00:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2020-07-07 14:00:36,171 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 176 [2020-07-07 14:00:36,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:36,171 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2020-07-07 14:00:36,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-07 14:00:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2020-07-07 14:00:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-07-07 14:00:36,172 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:36,173 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:36,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-07-07 14:00:36,173 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:36,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:36,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1247144425, now seen corresponding path program 33 times [2020-07-07 14:00:36,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:36,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333670431] [2020-07-07 14:00:36,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:38,317 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:38,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333670431] [2020-07-07 14:00:38,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:38,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2020-07-07 14:00:38,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034973515] [2020-07-07 14:00:38,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-07 14:00:38,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:38,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-07 14:00:38,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-07-07 14:00:38,319 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 70 states. [2020-07-07 14:00:41,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:41,808 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2020-07-07 14:00:41,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-07 14:00:41,809 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 181 [2020-07-07 14:00:41,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:41,810 INFO L225 Difference]: With dead ends: 196 [2020-07-07 14:00:41,810 INFO L226 Difference]: Without dead ends: 190 [2020-07-07 14:00:41,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-07-07 14:00:41,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-07 14:00:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-07-07 14:00:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-07 14:00:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-07-07 14:00:41,818 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 181 [2020-07-07 14:00:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:41,819 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-07-07 14:00:41,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-07 14:00:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-07-07 14:00:41,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-07 14:00:41,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:41,820 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:41,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-07-07 14:00:41,820 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:41,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:41,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1873479879, now seen corresponding path program 34 times [2020-07-07 14:00:41,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:41,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825192542] [2020-07-07 14:00:41,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:44,136 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:44,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825192542] [2020-07-07 14:00:44,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:44,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-07-07 14:00:44,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034448203] [2020-07-07 14:00:44,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-07 14:00:44,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:44,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-07 14:00:44,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-07-07 14:00:44,138 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 72 states. [2020-07-07 14:00:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:47,846 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2020-07-07 14:00:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-07-07 14:00:47,851 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 186 [2020-07-07 14:00:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:47,852 INFO L225 Difference]: With dead ends: 201 [2020-07-07 14:00:47,852 INFO L226 Difference]: Without dead ends: 195 [2020-07-07 14:00:47,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-07-07 14:00:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-07 14:00:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-07-07 14:00:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-07 14:00:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2020-07-07 14:00:47,859 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 186 [2020-07-07 14:00:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:47,859 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2020-07-07 14:00:47,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-07 14:00:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2020-07-07 14:00:47,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-07 14:00:47,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:47,861 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:47,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-07-07 14:00:47,861 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:47,862 INFO L82 PathProgramCache]: Analyzing trace with hash -61637801, now seen corresponding path program 35 times [2020-07-07 14:00:47,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:47,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255512992] [2020-07-07 14:00:47,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:50,384 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:50,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255512992] [2020-07-07 14:00:50,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:50,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2020-07-07 14:00:50,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072792479] [2020-07-07 14:00:50,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-07-07 14:00:50,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:50,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-07-07 14:00:50,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-07-07 14:00:50,386 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 74 states. [2020-07-07 14:00:54,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:54,347 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2020-07-07 14:00:54,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-07-07 14:00:54,348 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 191 [2020-07-07 14:00:54,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:54,349 INFO L225 Difference]: With dead ends: 206 [2020-07-07 14:00:54,350 INFO L226 Difference]: Without dead ends: 200 [2020-07-07 14:00:54,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-07-07 14:00:54,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-07 14:00:54,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-07-07 14:00:54,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-07-07 14:00:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2020-07-07 14:00:54,357 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 191 [2020-07-07 14:00:54,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:54,357 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2020-07-07 14:00:54,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-07-07 14:00:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2020-07-07 14:00:54,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-07-07 14:00:54,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:54,359 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:54,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-07-07 14:00:54,359 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:54,359 INFO L82 PathProgramCache]: Analyzing trace with hash -772220423, now seen corresponding path program 36 times [2020-07-07 14:00:54,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:54,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721677133] [2020-07-07 14:00:54,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:57,341 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:57,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721677133] [2020-07-07 14:00:57,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:57,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2020-07-07 14:00:57,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933566894] [2020-07-07 14:00:57,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-07-07 14:00:57,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:57,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-07-07 14:00:57,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-07-07 14:00:57,344 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 76 states. [2020-07-07 14:01:01,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:01,475 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2020-07-07 14:01:01,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-07-07 14:01:01,479 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 196 [2020-07-07 14:01:01,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:01,480 INFO L225 Difference]: With dead ends: 211 [2020-07-07 14:01:01,480 INFO L226 Difference]: Without dead ends: 205 [2020-07-07 14:01:01,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-07-07 14:01:01,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-07 14:01:01,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-07-07 14:01:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-07-07 14:01:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2020-07-07 14:01:01,488 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 196 [2020-07-07 14:01:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:01,488 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2020-07-07 14:01:01,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-07-07 14:01:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2020-07-07 14:01:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-07 14:01:01,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:01,490 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:01,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-07-07 14:01:01,490 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:01,490 INFO L82 PathProgramCache]: Analyzing trace with hash 930042007, now seen corresponding path program 37 times [2020-07-07 14:01:01,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:01,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606684799] [2020-07-07 14:01:01,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:04,310 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:04,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606684799] [2020-07-07 14:01:04,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:04,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2020-07-07 14:01:04,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718674945] [2020-07-07 14:01:04,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-07-07 14:01:04,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:04,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-07-07 14:01:04,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-07-07 14:01:04,312 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 78 states. [2020-07-07 14:01:08,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:08,801 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2020-07-07 14:01:08,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-07-07 14:01:08,802 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 201 [2020-07-07 14:01:08,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:08,804 INFO L225 Difference]: With dead ends: 216 [2020-07-07 14:01:08,804 INFO L226 Difference]: Without dead ends: 210 [2020-07-07 14:01:08,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-07-07 14:01:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-07 14:01:08,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-07-07 14:01:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-07 14:01:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2020-07-07 14:01:08,811 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 201 [2020-07-07 14:01:08,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:08,812 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2020-07-07 14:01:08,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-07-07 14:01:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2020-07-07 14:01:08,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-07-07 14:01:08,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:08,813 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:08,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-07-07 14:01:08,813 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:08,814 INFO L82 PathProgramCache]: Analyzing trace with hash 892357817, now seen corresponding path program 38 times [2020-07-07 14:01:08,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:08,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785412050] [2020-07-07 14:01:08,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:11,763 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:11,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785412050] [2020-07-07 14:01:11,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:11,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2020-07-07 14:01:11,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814729485] [2020-07-07 14:01:11,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-07-07 14:01:11,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:11,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-07-07 14:01:11,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-07-07 14:01:11,765 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 80 states. [2020-07-07 14:01:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:16,567 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2020-07-07 14:01:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-07-07 14:01:16,568 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 206 [2020-07-07 14:01:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:16,570 INFO L225 Difference]: With dead ends: 221 [2020-07-07 14:01:16,570 INFO L226 Difference]: Without dead ends: 215 [2020-07-07 14:01:16,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-07-07 14:01:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-07 14:01:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-07-07 14:01:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-07 14:01:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2020-07-07 14:01:16,578 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 206 [2020-07-07 14:01:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:16,579 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2020-07-07 14:01:16,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-07-07 14:01:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2020-07-07 14:01:16,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-07-07 14:01:16,580 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:16,580 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:16,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-07-07 14:01:16,580 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:16,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:16,581 INFO L82 PathProgramCache]: Analyzing trace with hash 246519255, now seen corresponding path program 39 times [2020-07-07 14:01:16,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:16,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721967931] [2020-07-07 14:01:16,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:19,709 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:19,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721967931] [2020-07-07 14:01:19,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:19,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2020-07-07 14:01:19,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398281018] [2020-07-07 14:01:19,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-07-07 14:01:19,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:19,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-07-07 14:01:19,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-07-07 14:01:19,711 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 82 states. [2020-07-07 14:01:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:24,799 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2020-07-07 14:01:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-07-07 14:01:24,800 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 211 [2020-07-07 14:01:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:24,802 INFO L225 Difference]: With dead ends: 226 [2020-07-07 14:01:24,802 INFO L226 Difference]: Without dead ends: 220 [2020-07-07 14:01:24,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-07-07 14:01:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-07-07 14:01:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-07-07 14:01:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-07-07 14:01:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2020-07-07 14:01:24,810 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 211 [2020-07-07 14:01:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:24,810 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2020-07-07 14:01:24,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-07-07 14:01:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2020-07-07 14:01:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-07-07 14:01:24,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:24,811 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:24,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-07-07 14:01:24,812 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:24,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:24,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1027125383, now seen corresponding path program 40 times [2020-07-07 14:01:24,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:24,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106558014] [2020-07-07 14:01:24,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:28,101 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:28,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106558014] [2020-07-07 14:01:28,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:28,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-07-07 14:01:28,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473109558] [2020-07-07 14:01:28,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-07-07 14:01:28,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:28,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-07-07 14:01:28,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-07-07 14:01:28,102 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 84 states. [2020-07-07 14:01:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:33,357 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2020-07-07 14:01:33,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-07-07 14:01:33,358 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 216 [2020-07-07 14:01:33,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:33,360 INFO L225 Difference]: With dead ends: 231 [2020-07-07 14:01:33,360 INFO L226 Difference]: Without dead ends: 225 [2020-07-07 14:01:33,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-07-07 14:01:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-07 14:01:33,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-07-07 14:01:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-07-07 14:01:33,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2020-07-07 14:01:33,367 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 216 [2020-07-07 14:01:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:33,367 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2020-07-07 14:01:33,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-07-07 14:01:33,368 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2020-07-07 14:01:33,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-07-07 14:01:33,369 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:33,369 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:33,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-07-07 14:01:33,369 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:33,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:33,370 INFO L82 PathProgramCache]: Analyzing trace with hash 416172823, now seen corresponding path program 41 times [2020-07-07 14:01:33,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:33,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801138323] [2020-07-07 14:01:33,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:36,905 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:36,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801138323] [2020-07-07 14:01:36,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:36,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2020-07-07 14:01:36,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384197487] [2020-07-07 14:01:36,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-07-07 14:01:36,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:36,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-07-07 14:01:36,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-07-07 14:01:36,907 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand 86 states. [2020-07-07 14:01:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:42,540 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2020-07-07 14:01:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-07-07 14:01:42,541 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 221 [2020-07-07 14:01:42,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:42,542 INFO L225 Difference]: With dead ends: 236 [2020-07-07 14:01:42,542 INFO L226 Difference]: Without dead ends: 230 [2020-07-07 14:01:42,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-07-07 14:01:42,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-07 14:01:42,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-07-07 14:01:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-07-07 14:01:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2020-07-07 14:01:42,551 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 221 [2020-07-07 14:01:42,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:42,551 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2020-07-07 14:01:42,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-07-07 14:01:42,552 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2020-07-07 14:01:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-07-07 14:01:42,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:42,553 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:42,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-07-07 14:01:42,554 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:42,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:42,554 INFO L82 PathProgramCache]: Analyzing trace with hash -192290247, now seen corresponding path program 42 times [2020-07-07 14:01:42,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:42,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105067682] [2020-07-07 14:01:42,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:46,309 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:46,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105067682] [2020-07-07 14:01:46,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:46,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2020-07-07 14:01:46,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797129959] [2020-07-07 14:01:46,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-07-07 14:01:46,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:46,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-07-07 14:01:46,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-07-07 14:01:46,311 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 88 states. [2020-07-07 14:01:52,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:52,415 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2020-07-07 14:01:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-07-07 14:01:52,416 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 226 [2020-07-07 14:01:52,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:52,417 INFO L225 Difference]: With dead ends: 241 [2020-07-07 14:01:52,418 INFO L226 Difference]: Without dead ends: 235 [2020-07-07 14:01:52,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-07-07 14:01:52,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-07-07 14:01:52,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2020-07-07 14:01:52,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-07 14:01:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2020-07-07 14:01:52,425 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 226 [2020-07-07 14:01:52,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:52,426 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2020-07-07 14:01:52,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-07-07 14:01:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2020-07-07 14:01:52,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-07-07 14:01:52,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:52,427 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:52,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-07-07 14:01:52,428 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:52,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:52,428 INFO L82 PathProgramCache]: Analyzing trace with hash 460943447, now seen corresponding path program 43 times [2020-07-07 14:01:52,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:52,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184757110] [2020-07-07 14:01:52,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:56,572 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:56,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184757110] [2020-07-07 14:01:56,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:56,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2020-07-07 14:01:56,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320650622] [2020-07-07 14:01:56,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-07-07 14:01:56,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:56,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-07-07 14:01:56,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-07-07 14:01:56,573 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 90 states. [2020-07-07 14:02:02,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:02,739 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2020-07-07 14:02:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-07-07 14:02:02,740 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 231 [2020-07-07 14:02:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:02,741 INFO L225 Difference]: With dead ends: 246 [2020-07-07 14:02:02,742 INFO L226 Difference]: Without dead ends: 240 [2020-07-07 14:02:02,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-07-07 14:02:02,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-07-07 14:02:02,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2020-07-07 14:02:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-07-07 14:02:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2020-07-07 14:02:02,750 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 231 [2020-07-07 14:02:02,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:02,750 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2020-07-07 14:02:02,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-07-07 14:02:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2020-07-07 14:02:02,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-07-07 14:02:02,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:02,752 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:02,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-07-07 14:02:02,752 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:02,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:02,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1967391993, now seen corresponding path program 44 times [2020-07-07 14:02:02,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:02,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680698025] [2020-07-07 14:02:02,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:07,024 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:07,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680698025] [2020-07-07 14:02:07,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:07,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2020-07-07 14:02:07,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786986427] [2020-07-07 14:02:07,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-07-07 14:02:07,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:07,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-07-07 14:02:07,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-07-07 14:02:07,027 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 92 states. [2020-07-07 14:02:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:13,820 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2020-07-07 14:02:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-07-07 14:02:13,821 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 236 [2020-07-07 14:02:13,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:13,824 INFO L225 Difference]: With dead ends: 251 [2020-07-07 14:02:13,824 INFO L226 Difference]: Without dead ends: 245 [2020-07-07 14:02:13,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-07-07 14:02:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-07-07 14:02:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2020-07-07 14:02:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-07-07 14:02:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2020-07-07 14:02:13,832 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 236 [2020-07-07 14:02:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:13,833 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2020-07-07 14:02:13,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-07-07 14:02:13,833 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2020-07-07 14:02:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-07 14:02:13,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:13,834 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:13,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-07-07 14:02:13,835 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:13,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1265042839, now seen corresponding path program 45 times [2020-07-07 14:02:13,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:13,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663485346] [2020-07-07 14:02:13,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:18,372 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:18,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663485346] [2020-07-07 14:02:18,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:18,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2020-07-07 14:02:18,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721893261] [2020-07-07 14:02:18,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-07-07 14:02:18,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:18,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-07-07 14:02:18,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-07-07 14:02:18,374 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 94 states. [2020-07-07 14:02:25,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:25,572 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2020-07-07 14:02:25,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-07-07 14:02:25,573 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 241 [2020-07-07 14:02:25,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:25,575 INFO L225 Difference]: With dead ends: 256 [2020-07-07 14:02:25,575 INFO L226 Difference]: Without dead ends: 250 [2020-07-07 14:02:25,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-07-07 14:02:25,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-07 14:02:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2020-07-07 14:02:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-07-07 14:02:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2020-07-07 14:02:25,581 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 241 [2020-07-07 14:02:25,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:25,581 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2020-07-07 14:02:25,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-07-07 14:02:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2020-07-07 14:02:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-07-07 14:02:25,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:25,583 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:25,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-07-07 14:02:25,583 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:25,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:25,583 INFO L82 PathProgramCache]: Analyzing trace with hash -524175431, now seen corresponding path program 46 times [2020-07-07 14:02:25,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:25,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477629302] [2020-07-07 14:02:25,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:30,379 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:30,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477629302] [2020-07-07 14:02:30,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:30,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2020-07-07 14:02:30,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687603963] [2020-07-07 14:02:30,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-07 14:02:30,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:30,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-07 14:02:30,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-07-07 14:02:30,380 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 96 states. [2020-07-07 14:02:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:38,070 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2020-07-07 14:02:38,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-07-07 14:02:38,072 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 246 [2020-07-07 14:02:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:38,074 INFO L225 Difference]: With dead ends: 261 [2020-07-07 14:02:38,074 INFO L226 Difference]: Without dead ends: 255 [2020-07-07 14:02:38,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-07-07 14:02:38,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-07 14:02:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2020-07-07 14:02:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-07-07 14:02:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2020-07-07 14:02:38,082 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 246 [2020-07-07 14:02:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:38,083 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2020-07-07 14:02:38,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-07-07 14:02:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2020-07-07 14:02:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-07-07 14:02:38,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:38,084 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:38,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-07-07 14:02:38,085 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:38,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1941239081, now seen corresponding path program 47 times [2020-07-07 14:02:38,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:38,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062827501] [2020-07-07 14:02:38,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:43,161 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:43,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062827501] [2020-07-07 14:02:43,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:43,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2020-07-07 14:02:43,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25607756] [2020-07-07 14:02:43,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-07-07 14:02:43,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:43,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-07-07 14:02:43,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-07-07 14:02:43,163 INFO L87 Difference]: Start difference. First operand 252 states and 252 transitions. Second operand 98 states. [2020-07-07 14:02:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:51,223 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2020-07-07 14:02:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-07-07 14:02:51,223 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 251 [2020-07-07 14:02:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:51,225 INFO L225 Difference]: With dead ends: 266 [2020-07-07 14:02:51,225 INFO L226 Difference]: Without dead ends: 260 [2020-07-07 14:02:51,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-07-07 14:02:51,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-07 14:02:51,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2020-07-07 14:02:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-07-07 14:02:51,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2020-07-07 14:02:51,234 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 251 [2020-07-07 14:02:51,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:51,234 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2020-07-07 14:02:51,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-07-07 14:02:51,234 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2020-07-07 14:02:51,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-07-07 14:02:51,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:51,236 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:51,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-07-07 14:02:51,236 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:51,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:51,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2083587463, now seen corresponding path program 48 times [2020-07-07 14:02:51,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:51,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758711391] [2020-07-07 14:02:51,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:56,635 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:56,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758711391] [2020-07-07 14:02:56,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:56,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2020-07-07 14:02:56,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071421057] [2020-07-07 14:02:56,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-07-07 14:02:56,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:56,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-07-07 14:02:56,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-07-07 14:02:56,637 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 100 states. [2020-07-07 14:03:05,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:05,047 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2020-07-07 14:03:05,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-07-07 14:03:05,048 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 256 [2020-07-07 14:03:05,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:05,050 INFO L225 Difference]: With dead ends: 271 [2020-07-07 14:03:05,050 INFO L226 Difference]: Without dead ends: 265 [2020-07-07 14:03:05,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-07-07 14:03:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-07-07 14:03:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2020-07-07 14:03:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-07-07 14:03:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 262 transitions. [2020-07-07 14:03:05,058 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 262 transitions. Word has length 256 [2020-07-07 14:03:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:05,058 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 262 transitions. [2020-07-07 14:03:05,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-07-07 14:03:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 262 transitions. [2020-07-07 14:03:05,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-07-07 14:03:05,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:05,060 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:05,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-07-07 14:03:05,061 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:05,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:05,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1327923177, now seen corresponding path program 49 times [2020-07-07 14:03:05,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:05,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511189371] [2020-07-07 14:03:05,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:10,840 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:10,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511189371] [2020-07-07 14:03:10,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:10,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2020-07-07 14:03:10,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886884246] [2020-07-07 14:03:10,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-07-07 14:03:10,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:10,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-07-07 14:03:10,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-07-07 14:03:10,842 INFO L87 Difference]: Start difference. First operand 262 states and 262 transitions. Second operand 102 states. [2020-07-07 14:03:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:19,883 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2020-07-07 14:03:19,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-07-07 14:03:19,884 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 261 [2020-07-07 14:03:19,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:19,886 INFO L225 Difference]: With dead ends: 276 [2020-07-07 14:03:19,886 INFO L226 Difference]: Without dead ends: 270 [2020-07-07 14:03:19,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-07-07 14:03:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-07-07 14:03:19,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2020-07-07 14:03:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-07-07 14:03:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2020-07-07 14:03:19,893 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 261 [2020-07-07 14:03:19,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:19,893 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2020-07-07 14:03:19,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-07-07 14:03:19,894 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2020-07-07 14:03:19,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-07-07 14:03:19,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:19,895 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:19,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-07-07 14:03:19,896 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:19,896 INFO L82 PathProgramCache]: Analyzing trace with hash 473419065, now seen corresponding path program 50 times [2020-07-07 14:03:19,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:19,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910361125] [2020-07-07 14:03:19,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:26,010 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:26,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910361125] [2020-07-07 14:03:26,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:26,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2020-07-07 14:03:26,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537662211] [2020-07-07 14:03:26,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-07-07 14:03:26,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:26,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-07-07 14:03:26,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-07-07 14:03:26,012 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 104 states. [2020-07-07 14:03:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:35,641 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2020-07-07 14:03:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-07-07 14:03:35,642 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 266 [2020-07-07 14:03:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:35,644 INFO L225 Difference]: With dead ends: 281 [2020-07-07 14:03:35,644 INFO L226 Difference]: Without dead ends: 275 [2020-07-07 14:03:35,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-07-07 14:03:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-07-07 14:03:35,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 272. [2020-07-07 14:03:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-07-07 14:03:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2020-07-07 14:03:35,656 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 266 [2020-07-07 14:03:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:35,656 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2020-07-07 14:03:35,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-07-07 14:03:35,656 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2020-07-07 14:03:35,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-07-07 14:03:35,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:35,658 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:35,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-07-07 14:03:35,658 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:35,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1161403049, now seen corresponding path program 51 times [2020-07-07 14:03:35,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:35,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782097631] [2020-07-07 14:03:35,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:42,229 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:42,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782097631] [2020-07-07 14:03:42,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:42,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2020-07-07 14:03:42,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905149913] [2020-07-07 14:03:42,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-07-07 14:03:42,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:42,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-07-07 14:03:42,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-07-07 14:03:42,231 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 106 states. [2020-07-07 14:03:52,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:52,591 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2020-07-07 14:03:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-07-07 14:03:52,592 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 271 [2020-07-07 14:03:52,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:52,595 INFO L225 Difference]: With dead ends: 286 [2020-07-07 14:03:52,595 INFO L226 Difference]: Without dead ends: 280 [2020-07-07 14:03:52,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-07-07 14:03:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-07-07 14:03:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2020-07-07 14:03:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-07-07 14:03:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2020-07-07 14:03:52,603 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 271 [2020-07-07 14:03:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:52,603 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2020-07-07 14:03:52,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-07-07 14:03:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2020-07-07 14:03:52,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-07-07 14:03:52,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:52,605 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:52,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-07-07 14:03:52,605 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:52,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:52,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1731710983, now seen corresponding path program 52 times [2020-07-07 14:03:52,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:52,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824766117] [2020-07-07 14:03:52,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:59,587 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:59,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824766117] [2020-07-07 14:03:59,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:59,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2020-07-07 14:03:59,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099258790] [2020-07-07 14:03:59,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-07-07 14:03:59,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:59,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-07-07 14:03:59,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-07-07 14:03:59,590 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 108 states. [2020-07-07 14:04:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:10,363 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2020-07-07 14:04:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-07-07 14:04:10,364 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 276 [2020-07-07 14:04:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:10,365 INFO L225 Difference]: With dead ends: 291 [2020-07-07 14:04:10,365 INFO L226 Difference]: Without dead ends: 285 [2020-07-07 14:04:10,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-07-07 14:04:10,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-07 14:04:10,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2020-07-07 14:04:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-07-07 14:04:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 282 transitions. [2020-07-07 14:04:10,374 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 282 transitions. Word has length 276 [2020-07-07 14:04:10,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:10,375 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 282 transitions. [2020-07-07 14:04:10,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-07-07 14:04:10,375 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 282 transitions. [2020-07-07 14:04:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-07-07 14:04:10,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:10,376 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:10,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-07-07 14:04:10,377 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:10,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:10,377 INFO L82 PathProgramCache]: Analyzing trace with hash 449165975, now seen corresponding path program 53 times [2020-07-07 14:04:10,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:10,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852520407] [2020-07-07 14:04:10,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:17,877 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:17,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852520407] [2020-07-07 14:04:17,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:17,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2020-07-07 14:04:17,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680027509] [2020-07-07 14:04:17,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-07-07 14:04:17,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:17,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-07-07 14:04:17,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-07-07 14:04:17,879 INFO L87 Difference]: Start difference. First operand 282 states and 282 transitions. Second operand 110 states. [2020-07-07 14:04:29,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:29,673 INFO L93 Difference]: Finished difference Result 296 states and 296 transitions. [2020-07-07 14:04:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-07-07 14:04:29,674 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 281 [2020-07-07 14:04:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:29,675 INFO L225 Difference]: With dead ends: 296 [2020-07-07 14:04:29,676 INFO L226 Difference]: Without dead ends: 290 [2020-07-07 14:04:29,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-07-07 14:04:29,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-07-07 14:04:29,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 287. [2020-07-07 14:04:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-07-07 14:04:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2020-07-07 14:04:29,682 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 281 [2020-07-07 14:04:29,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:29,683 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2020-07-07 14:04:29,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-07-07 14:04:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2020-07-07 14:04:29,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-07 14:04:29,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:29,684 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:29,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-07-07 14:04:29,685 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:29,685 INFO L82 PathProgramCache]: Analyzing trace with hash -649321799, now seen corresponding path program 54 times [2020-07-07 14:04:29,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:29,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524947385] [2020-07-07 14:04:29,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:37,701 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:37,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524947385] [2020-07-07 14:04:37,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:37,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2020-07-07 14:04:37,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937699707] [2020-07-07 14:04:37,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-07-07 14:04:37,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:37,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-07-07 14:04:37,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-07-07 14:04:37,704 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 112 states. [2020-07-07 14:04:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:50,304 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2020-07-07 14:04:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-07-07 14:04:50,305 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 286 [2020-07-07 14:04:50,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:50,307 INFO L225 Difference]: With dead ends: 301 [2020-07-07 14:04:50,307 INFO L226 Difference]: Without dead ends: 295 [2020-07-07 14:04:50,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-07-07 14:04:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-07-07 14:04:50,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2020-07-07 14:04:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-07-07 14:04:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2020-07-07 14:04:50,316 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 286 [2020-07-07 14:04:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:50,316 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2020-07-07 14:04:50,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-07-07 14:04:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2020-07-07 14:04:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-07-07 14:04:50,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:50,318 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:50,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-07-07 14:04:50,318 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:50,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:50,319 INFO L82 PathProgramCache]: Analyzing trace with hash -259293225, now seen corresponding path program 55 times [2020-07-07 14:04:50,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:50,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841310024] [2020-07-07 14:04:50,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:59,151 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:59,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841310024] [2020-07-07 14:04:59,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:59,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2020-07-07 14:04:59,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146970028] [2020-07-07 14:04:59,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-07-07 14:04:59,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:59,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-07-07 14:04:59,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-07-07 14:04:59,154 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 114 states. [2020-07-07 14:05:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:05:13,403 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2020-07-07 14:05:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-07-07 14:05:13,405 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 291 [2020-07-07 14:05:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:05:13,407 INFO L225 Difference]: With dead ends: 306 [2020-07-07 14:05:13,407 INFO L226 Difference]: Without dead ends: 300 [2020-07-07 14:05:13,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-07-07 14:05:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-07-07 14:05:13,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 297. [2020-07-07 14:05:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-07-07 14:05:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2020-07-07 14:05:13,417 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 291 [2020-07-07 14:05:13,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:05:13,417 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2020-07-07 14:05:13,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-07-07 14:05:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2020-07-07 14:05:13,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-07-07 14:05:13,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:05:13,419 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:05:13,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-07-07 14:05:13,419 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:05:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:05:13,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1854907769, now seen corresponding path program 56 times [2020-07-07 14:05:13,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:05:13,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798294938] [2020-07-07 14:05:13,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:05:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:05:22,845 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:05:22,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798294938] [2020-07-07 14:05:22,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:05:22,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2020-07-07 14:05:22,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761410483] [2020-07-07 14:05:22,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-07-07 14:05:22,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:05:22,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-07-07 14:05:22,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-07-07 14:05:22,847 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand 116 states. [2020-07-07 14:05:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:05:37,837 INFO L93 Difference]: Finished difference Result 311 states and 311 transitions. [2020-07-07 14:05:37,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-07-07 14:05:37,838 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 296 [2020-07-07 14:05:37,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:05:37,840 INFO L225 Difference]: With dead ends: 311 [2020-07-07 14:05:37,840 INFO L226 Difference]: Without dead ends: 305 [2020-07-07 14:05:37,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-07-07 14:05:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-07-07 14:05:37,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 302. [2020-07-07 14:05:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-07-07 14:05:37,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 302 transitions. [2020-07-07 14:05:37,848 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 302 transitions. Word has length 296 [2020-07-07 14:05:37,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:05:37,848 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 302 transitions. [2020-07-07 14:05:37,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-07-07 14:05:37,848 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 302 transitions. [2020-07-07 14:05:37,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-07-07 14:05:37,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:05:37,849 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:05:37,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-07-07 14:05:37,850 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:05:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:05:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1254864151, now seen corresponding path program 57 times [2020-07-07 14:05:37,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:05:37,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560318158] [2020-07-07 14:05:37,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:05:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:05:47,924 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:05:47,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560318158] [2020-07-07 14:05:47,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:05:47,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2020-07-07 14:05:47,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132642056] [2020-07-07 14:05:47,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-07-07 14:05:47,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:05:47,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-07-07 14:05:47,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-07-07 14:05:47,926 INFO L87 Difference]: Start difference. First operand 302 states and 302 transitions. Second operand 118 states. [2020-07-07 14:06:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:04,156 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2020-07-07 14:06:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-07-07 14:06:04,157 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 301 [2020-07-07 14:06:04,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:04,159 INFO L225 Difference]: With dead ends: 316 [2020-07-07 14:06:04,159 INFO L226 Difference]: Without dead ends: 310 [2020-07-07 14:06:04,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-07-07 14:06:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-07-07 14:06:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-07-07 14:06:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-07-07 14:06:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2020-07-07 14:06:04,166 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 301 [2020-07-07 14:06:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:04,166 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2020-07-07 14:06:04,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-07-07 14:06:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2020-07-07 14:06:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-07-07 14:06:04,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:04,168 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:04,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-07-07 14:06:04,168 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:04,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:04,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1516156985, now seen corresponding path program 58 times [2020-07-07 14:06:04,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:04,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301928288] [2020-07-07 14:06:04,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:06:15,134 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:15,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301928288] [2020-07-07 14:06:15,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:15,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2020-07-07 14:06:15,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205759228] [2020-07-07 14:06:15,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-07-07 14:06:15,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:15,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-07-07 14:06:15,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-07-07 14:06:15,136 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 120 states. [2020-07-07 14:06:32,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:32,502 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2020-07-07 14:06:32,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-07-07 14:06:32,504 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 306 [2020-07-07 14:06:32,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:32,505 INFO L225 Difference]: With dead ends: 321 [2020-07-07 14:06:32,506 INFO L226 Difference]: Without dead ends: 315 [2020-07-07 14:06:32,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-07-07 14:06:32,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-07-07 14:06:32,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 312. [2020-07-07 14:06:32,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-07-07 14:06:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 312 transitions. [2020-07-07 14:06:32,513 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 312 transitions. Word has length 306 [2020-07-07 14:06:32,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:32,514 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 312 transitions. [2020-07-07 14:06:32,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-07-07 14:06:32,514 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 312 transitions. [2020-07-07 14:06:32,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-07-07 14:06:32,515 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:32,516 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:32,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-07-07 14:06:32,516 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:32,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1731877463, now seen corresponding path program 59 times [2020-07-07 14:06:32,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:32,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709994557] [2020-07-07 14:06:32,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:06:44,637 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:44,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709994557] [2020-07-07 14:06:44,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:44,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2020-07-07 14:06:44,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10295310] [2020-07-07 14:06:44,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-07-07 14:06:44,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:44,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-07-07 14:06:44,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-07-07 14:06:44,639 INFO L87 Difference]: Start difference. First operand 312 states and 312 transitions. Second operand 122 states. [2020-07-07 14:07:03,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:07:03,732 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2020-07-07 14:07:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-07-07 14:07:03,734 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 311 [2020-07-07 14:07:03,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:07:03,736 INFO L225 Difference]: With dead ends: 326 [2020-07-07 14:07:03,736 INFO L226 Difference]: Without dead ends: 320 [2020-07-07 14:07:03,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10442 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=18000, Invalid=39360, Unknown=0, NotChecked=0, Total=57360 [2020-07-07 14:07:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-07-07 14:07:03,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 317. [2020-07-07 14:07:03,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-07-07 14:07:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2020-07-07 14:07:03,742 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 311 [2020-07-07 14:07:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:07:03,742 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2020-07-07 14:07:03,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 122 states. [2020-07-07 14:07:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2020-07-07 14:07:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-07-07 14:07:03,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:07:03,744 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:07:03,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-07-07 14:07:03,744 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:07:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:07:03,744 INFO L82 PathProgramCache]: Analyzing trace with hash -813344007, now seen corresponding path program 60 times [2020-07-07 14:07:03,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:07:03,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504013288] [2020-07-07 14:07:03,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:07:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:07:17,114 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:07:17,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504013288] [2020-07-07 14:07:17,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:07:17,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2020-07-07 14:07:17,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775359584] [2020-07-07 14:07:17,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2020-07-07 14:07:17,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:07:17,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2020-07-07 14:07:17,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=11407, Unknown=0, NotChecked=0, Total=15252 [2020-07-07 14:07:17,116 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 124 states. [2020-07-07 14:07:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:07:38,501 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2020-07-07 14:07:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-07-07 14:07:38,503 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 316 [2020-07-07 14:07:38,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:07:38,505 INFO L225 Difference]: With dead ends: 331 [2020-07-07 14:07:38,505 INFO L226 Difference]: Without dead ends: 325 [2020-07-07 14:07:38,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10799 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=18605, Invalid=40687, Unknown=0, NotChecked=0, Total=59292 [2020-07-07 14:07:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-07-07 14:07:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2020-07-07 14:07:38,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-07-07 14:07:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 322 transitions. [2020-07-07 14:07:38,512 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 322 transitions. Word has length 316 [2020-07-07 14:07:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:07:38,513 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 322 transitions. [2020-07-07 14:07:38,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 124 states. [2020-07-07 14:07:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 322 transitions. [2020-07-07 14:07:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-07-07 14:07:38,514 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:07:38,514 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:07:38,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-07-07 14:07:38,515 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:07:38,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:07:38,515 INFO L82 PathProgramCache]: Analyzing trace with hash -225742953, now seen corresponding path program 61 times [2020-07-07 14:07:38,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:07:38,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661116372] [2020-07-07 14:07:38,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:07:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:07:53,217 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:07:53,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661116372] [2020-07-07 14:07:53,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:07:53,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2020-07-07 14:07:53,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392070131] [2020-07-07 14:07:53,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2020-07-07 14:07:53,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:07:53,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2020-07-07 14:07:53,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3970, Invalid=11780, Unknown=0, NotChecked=0, Total=15750 [2020-07-07 14:07:53,219 INFO L87 Difference]: Start difference. First operand 322 states and 322 transitions. Second operand 126 states. [2020-07-07 14:08:16,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:08:16,356 INFO L93 Difference]: Finished difference Result 336 states and 336 transitions. [2020-07-07 14:08:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2020-07-07 14:08:16,359 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 321 [2020-07-07 14:08:16,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:08:16,361 INFO L225 Difference]: With dead ends: 336 [2020-07-07 14:08:16,361 INFO L226 Difference]: Without dead ends: 330 [2020-07-07 14:08:16,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11162 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=19220, Invalid=42036, Unknown=0, NotChecked=0, Total=61256 [2020-07-07 14:08:16,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-07-07 14:08:16,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 327. [2020-07-07 14:08:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-07-07 14:08:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2020-07-07 14:08:16,368 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 321 [2020-07-07 14:08:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:08:16,369 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2020-07-07 14:08:16,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 126 states. [2020-07-07 14:08:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2020-07-07 14:08:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-07 14:08:16,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:08:16,371 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:08:16,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-07-07 14:08:16,371 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:08:16,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:08:16,371 INFO L82 PathProgramCache]: Analyzing trace with hash -238056007, now seen corresponding path program 62 times [2020-07-07 14:08:16,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:08:16,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934808261] [2020-07-07 14:08:16,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:08:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:08:32,873 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:08:32,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934808261] [2020-07-07 14:08:32,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:08:32,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2020-07-07 14:08:32,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989108731] [2020-07-07 14:08:32,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2020-07-07 14:08:32,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:08:32,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2020-07-07 14:08:32,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=12159, Unknown=0, NotChecked=0, Total=16256 [2020-07-07 14:08:32,875 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand 128 states. [2020-07-07 14:08:57,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:08:57,382 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2020-07-07 14:08:57,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2020-07-07 14:08:57,385 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 326 [2020-07-07 14:08:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:08:57,387 INFO L225 Difference]: With dead ends: 341 [2020-07-07 14:08:57,387 INFO L226 Difference]: Without dead ends: 335 [2020-07-07 14:08:57,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11531 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=19845, Invalid=43407, Unknown=0, NotChecked=0, Total=63252 [2020-07-07 14:08:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-07-07 14:08:57,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 332. [2020-07-07 14:08:57,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-07-07 14:08:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 332 transitions. [2020-07-07 14:08:57,395 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 332 transitions. Word has length 326 [2020-07-07 14:08:57,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:08:57,395 INFO L479 AbstractCegarLoop]: Abstraction has 332 states and 332 transitions. [2020-07-07 14:08:57,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 128 states. [2020-07-07 14:08:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 332 transitions. [2020-07-07 14:08:57,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-07 14:08:57,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:08:57,397 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:08:57,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-07-07 14:08:57,397 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:08:57,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:08:57,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1215493335, now seen corresponding path program 63 times [2020-07-07 14:08:57,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:08:57,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268104939] [2020-07-07 14:08:57,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:08:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:09:14,964 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:09:14,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268104939] [2020-07-07 14:09:14,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:09:14,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2020-07-07 14:09:14,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332435589] [2020-07-07 14:09:14,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2020-07-07 14:09:14,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:09:14,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2020-07-07 14:09:14,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4226, Invalid=12544, Unknown=0, NotChecked=0, Total=16770 [2020-07-07 14:09:14,967 INFO L87 Difference]: Start difference. First operand 332 states and 332 transitions. Second operand 130 states. [2020-07-07 14:09:42,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:09:42,341 INFO L93 Difference]: Finished difference Result 346 states and 346 transitions. [2020-07-07 14:09:42,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2020-07-07 14:09:42,344 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 331 [2020-07-07 14:09:42,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:09:42,346 INFO L225 Difference]: With dead ends: 346 [2020-07-07 14:09:42,346 INFO L226 Difference]: Without dead ends: 340 [2020-07-07 14:09:42,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11906 ImplicationChecksByTransitivity, 42.2s TimeCoverageRelationStatistics Valid=20480, Invalid=44800, Unknown=0, NotChecked=0, Total=65280 [2020-07-07 14:09:42,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-07-07 14:09:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 337. [2020-07-07 14:09:42,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-07-07 14:09:42,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 337 transitions. [2020-07-07 14:09:42,355 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 337 transitions. Word has length 331 [2020-07-07 14:09:42,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:09:42,356 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 337 transitions. [2020-07-07 14:09:42,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 130 states. [2020-07-07 14:09:42,356 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 337 transitions. [2020-07-07 14:09:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-07 14:09:42,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:09:42,358 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:09:42,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-07-07 14:09:42,358 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:09:42,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:09:42,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1777774471, now seen corresponding path program 64 times [2020-07-07 14:09:42,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:09:42,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718324698] [2020-07-07 14:09:42,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:09:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:10:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:10:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:10:01,562 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:10:01,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718324698] [2020-07-07 14:10:01,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:10:01,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2020-07-07 14:10:01,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286908507] [2020-07-07 14:10:01,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-07 14:10:01,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:10:01,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-07 14:10:01,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4357, Invalid=12935, Unknown=0, NotChecked=0, Total=17292 [2020-07-07 14:10:01,564 INFO L87 Difference]: Start difference. First operand 337 states and 337 transitions. Second operand 132 states. [2020-07-07 14:10:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:10:31,530 INFO L93 Difference]: Finished difference Result 351 states and 351 transitions. [2020-07-07 14:10:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2020-07-07 14:10:31,533 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 336 [2020-07-07 14:10:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:10:31,536 INFO L225 Difference]: With dead ends: 351 [2020-07-07 14:10:31,536 INFO L226 Difference]: Without dead ends: 345 [2020-07-07 14:10:31,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12287 ImplicationChecksByTransitivity, 46.3s TimeCoverageRelationStatistics Valid=21125, Invalid=46215, Unknown=0, NotChecked=0, Total=67340 [2020-07-07 14:10:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-07-07 14:10:31,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2020-07-07 14:10:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-07-07 14:10:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 342 transitions. [2020-07-07 14:10:31,543 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 342 transitions. Word has length 336 [2020-07-07 14:10:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:10:31,543 INFO L479 AbstractCegarLoop]: Abstraction has 342 states and 342 transitions. [2020-07-07 14:10:31,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 132 states. [2020-07-07 14:10:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 342 transitions. [2020-07-07 14:10:31,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-07 14:10:31,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:10:31,545 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:10:31,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-07-07 14:10:31,545 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:10:31,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:10:31,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1281037801, now seen corresponding path program 65 times [2020-07-07 14:10:31,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:10:31,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407529849] [2020-07-07 14:10:31,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:10:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:10:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:10:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:10:51,606 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:10:51,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407529849] [2020-07-07 14:10:51,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:10:51,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2020-07-07 14:10:51,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416808640] [2020-07-07 14:10:51,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2020-07-07 14:10:51,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:10:51,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2020-07-07 14:10:51,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4490, Invalid=13332, Unknown=0, NotChecked=0, Total=17822 [2020-07-07 14:10:51,608 INFO L87 Difference]: Start difference. First operand 342 states and 342 transitions. Second operand 134 states. [2020-07-07 14:11:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:11:23,175 INFO L93 Difference]: Finished difference Result 356 states and 356 transitions. [2020-07-07 14:11:23,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2020-07-07 14:11:23,178 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 341 [2020-07-07 14:11:23,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:11:23,180 INFO L225 Difference]: With dead ends: 356 [2020-07-07 14:11:23,180 INFO L226 Difference]: Without dead ends: 350 [2020-07-07 14:11:23,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12674 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=21780, Invalid=47652, Unknown=0, NotChecked=0, Total=69432 [2020-07-07 14:11:23,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-07-07 14:11:23,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 347. [2020-07-07 14:11:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-07-07 14:11:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2020-07-07 14:11:23,188 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 341 [2020-07-07 14:11:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:11:23,188 INFO L479 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2020-07-07 14:11:23,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 134 states. [2020-07-07 14:11:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2020-07-07 14:11:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-07 14:11:23,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:11:23,190 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:11:23,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-07-07 14:11:23,190 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:11:23,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:11:23,191 INFO L82 PathProgramCache]: Analyzing trace with hash 33465145, now seen corresponding path program 66 times [2020-07-07 14:11:23,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:11:23,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938009381] [2020-07-07 14:11:23,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:11:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:11:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:11:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:11:44,177 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:11:44,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938009381] [2020-07-07 14:11:44,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:11:44,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2020-07-07 14:11:44,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647069719] [2020-07-07 14:11:44,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2020-07-07 14:11:44,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:11:44,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2020-07-07 14:11:44,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4625, Invalid=13735, Unknown=0, NotChecked=0, Total=18360 [2020-07-07 14:11:44,179 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand 136 states. [2020-07-07 14:12:17,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:12:17,361 INFO L93 Difference]: Finished difference Result 361 states and 361 transitions. [2020-07-07 14:12:17,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2020-07-07 14:12:17,364 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 346 [2020-07-07 14:12:17,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:12:17,366 INFO L225 Difference]: With dead ends: 361 [2020-07-07 14:12:17,366 INFO L226 Difference]: Without dead ends: 355 [2020-07-07 14:12:17,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13067 ImplicationChecksByTransitivity, 51.1s TimeCoverageRelationStatistics Valid=22445, Invalid=49111, Unknown=0, NotChecked=0, Total=71556 [2020-07-07 14:12:17,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-07-07 14:12:17,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 352. [2020-07-07 14:12:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-07-07 14:12:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2020-07-07 14:12:17,374 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 346 [2020-07-07 14:12:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:12:17,374 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2020-07-07 14:12:17,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 136 states. [2020-07-07 14:12:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2020-07-07 14:12:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-07 14:12:17,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:12:17,375 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:12:17,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-07-07 14:12:17,376 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:12:17,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:12:17,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1378529449, now seen corresponding path program 67 times [2020-07-07 14:12:17,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:12:17,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691847947] [2020-07-07 14:12:17,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:12:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat