/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:25:06,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:25:06,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:25:07,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:25:07,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:25:07,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:25:07,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:25:07,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:25:07,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:25:07,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:25:07,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:25:07,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:25:07,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:25:07,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:25:07,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:25:07,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:25:07,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:25:07,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:25:07,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:25:07,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:25:07,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:25:07,132 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:25:07,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:25:07,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:25:07,138 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:25:07,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:25:07,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:25:07,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:25:07,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:25:07,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:25:07,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:25:07,141 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:25:07,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:25:07,141 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:25:07,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:25:07,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:25:07,142 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:25:07,142 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:25:07,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:25:07,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:25:07,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:25:07,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:25:07,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:25:07,143 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:25:07,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:25:07,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:25:07,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:25:07,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:25:07,562 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:25:07,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-10-24 02:25:07,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f9293c21/770c8cf3cabc4b1e9abf931b48bd92fa/FLAGccf773345 [2020-10-24 02:25:08,288 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:25:08,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-10-24 02:25:08,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f9293c21/770c8cf3cabc4b1e9abf931b48bd92fa/FLAGccf773345 [2020-10-24 02:25:08,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f9293c21/770c8cf3cabc4b1e9abf931b48bd92fa [2020-10-24 02:25:08,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:25:08,654 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:25:08,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:25:08,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:25:08,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:25:08,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14fa2f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08, skipping insertion in model container [2020-10-24 02:25:08,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:25:08,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:25:08,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:25:08,928 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:25:08,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:25:08,963 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:25:08,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08 WrapperNode [2020-10-24 02:25:08,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:25:08,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:25:08,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:25:08,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:25:08,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:09,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:09,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:09,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:25:09,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:25:09,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:25:09,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:25:09,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:25:09,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:25:09,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:25:09,097 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:25:09,097 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:25:09,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:25:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:25:09,098 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:25:09,098 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:25:09,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:25:09,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:25:09,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:25:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:25:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:25:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:25:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:25:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:25:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:25:09,474 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:25:09,474 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:25:09,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:25:09 BoogieIcfgContainer [2020-10-24 02:25:09,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:25:09,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:25:09,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:25:09,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:25:09,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:25:08" (1/3) ... [2020-10-24 02:25:09,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c423e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:25:09, skipping insertion in model container [2020-10-24 02:25:09,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (2/3) ... [2020-10-24 02:25:09,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c423e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:25:09, skipping insertion in model container [2020-10-24 02:25:09,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:25:09" (3/3) ... [2020-10-24 02:25:09,486 INFO L111 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2020-10-24 02:25:09,500 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:25:09,505 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:25:09,519 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:25:09,546 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:25:09,546 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:25:09,546 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:25:09,546 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:25:09,546 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:25:09,547 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:25:09,547 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:25:09,547 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:25:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-24 02:25:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-24 02:25:09,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:09,575 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] [2020-10-24 02:25:09,576 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:09,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:09,586 INFO L82 PathProgramCache]: Analyzing trace with hash -772490682, now seen corresponding path program 1 times [2020-10-24 02:25:09,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:09,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164672112] [2020-10-24 02:25:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:10,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164672112] [2020-10-24 02:25:10,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:25:10,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:25:10,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554551502] [2020-10-24 02:25:10,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:25:10,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:10,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:25:10,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:25:10,139 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-10-24 02:25:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:10,400 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-24 02:25:10,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:25:10,403 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-24 02:25:10,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:10,412 INFO L225 Difference]: With dead ends: 50 [2020-10-24 02:25:10,413 INFO L226 Difference]: Without dead ends: 29 [2020-10-24 02:25:10,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:25:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-24 02:25:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-24 02:25:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-24 02:25:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-24 02:25:10,468 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 20 [2020-10-24 02:25:10,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:10,468 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-24 02:25:10,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:25:10,469 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-24 02:25:10,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-24 02:25:10,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:10,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:10,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:25:10,471 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:10,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:10,472 INFO L82 PathProgramCache]: Analyzing trace with hash 515607529, now seen corresponding path program 1 times [2020-10-24 02:25:10,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:10,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503224360] [2020-10-24 02:25:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:10,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503224360] [2020-10-24 02:25:10,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:10,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:25:10,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060823774] [2020-10-24 02:25:10,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:25:10,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:10,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:25:10,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:25:10,668 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 6 states. [2020-10-24 02:25:10,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:10,908 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-24 02:25:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:25:10,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-24 02:25:10,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:10,910 INFO L225 Difference]: With dead ends: 40 [2020-10-24 02:25:10,910 INFO L226 Difference]: Without dead ends: 34 [2020-10-24 02:25:10,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:25:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-24 02:25:10,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-24 02:25:10,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 02:25:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-24 02:25:10,925 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 25 [2020-10-24 02:25:10,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:10,925 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-24 02:25:10,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:25:10,926 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-24 02:25:10,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-24 02:25:10,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:10,927 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, 1, 1, 1, 1] [2020-10-24 02:25:10,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:25:10,927 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:10,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1732949978, now seen corresponding path program 2 times [2020-10-24 02:25:10,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:10,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328116597] [2020-10-24 02:25:10,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:11,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:11,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328116597] [2020-10-24 02:25:11,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:11,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:25:11,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350388671] [2020-10-24 02:25:11,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:25:11,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:11,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:25:11,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:25:11,157 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 8 states. [2020-10-24 02:25:11,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:11,745 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-24 02:25:11,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 02:25:11,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-24 02:25:11,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:11,748 INFO L225 Difference]: With dead ends: 45 [2020-10-24 02:25:11,750 INFO L226 Difference]: Without dead ends: 39 [2020-10-24 02:25:11,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:25:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-24 02:25:11,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-24 02:25:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-24 02:25:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-24 02:25:11,777 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 30 [2020-10-24 02:25:11,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:11,778 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-24 02:25:11,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:25:11,778 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-24 02:25:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-24 02:25:11,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:11,781 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, 1, 1, 1, 1] [2020-10-24 02:25:11,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:25:11,782 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:11,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1450661367, now seen corresponding path program 3 times [2020-10-24 02:25:11,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:11,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067059530] [2020-10-24 02:25:11,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:12,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067059530] [2020-10-24 02:25:12,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:12,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:25:12,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758104593] [2020-10-24 02:25:12,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:25:12,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:12,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:25:12,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:25:12,077 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 10 states. [2020-10-24 02:25:12,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:12,674 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-24 02:25:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:25:12,674 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-24 02:25:12,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:12,676 INFO L225 Difference]: With dead ends: 50 [2020-10-24 02:25:12,676 INFO L226 Difference]: Without dead ends: 44 [2020-10-24 02:25:12,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:25:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-24 02:25:12,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-24 02:25:12,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-24 02:25:12,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-24 02:25:12,692 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 35 [2020-10-24 02:25:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:12,692 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-24 02:25:12,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:25:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-24 02:25:12,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-24 02:25:12,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:12,694 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, 1, 1, 1, 1] [2020-10-24 02:25:12,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:25:12,694 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:12,695 INFO L82 PathProgramCache]: Analyzing trace with hash 772144646, now seen corresponding path program 4 times [2020-10-24 02:25:12,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:12,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939488043] [2020-10-24 02:25:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:12,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939488043] [2020-10-24 02:25:12,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:12,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:25:12,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373047754] [2020-10-24 02:25:12,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:25:12,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:12,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:25:12,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:25:12,973 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 12 states. [2020-10-24 02:25:13,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:13,861 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-24 02:25:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:25:13,867 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-24 02:25:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:13,869 INFO L225 Difference]: With dead ends: 55 [2020-10-24 02:25:13,869 INFO L226 Difference]: Without dead ends: 49 [2020-10-24 02:25:13,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:25:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-24 02:25:13,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-24 02:25:13,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-24 02:25:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-24 02:25:13,890 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 40 [2020-10-24 02:25:13,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:13,890 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-24 02:25:13,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:25:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-24 02:25:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-24 02:25:13,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:13,892 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, 1, 1, 1, 1] [2020-10-24 02:25:13,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:25:13,893 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:13,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1100914729, now seen corresponding path program 5 times [2020-10-24 02:25:13,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:13,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26149828] [2020-10-24 02:25:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:14,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:14,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26149828] [2020-10-24 02:25:14,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:14,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-24 02:25:14,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150733353] [2020-10-24 02:25:14,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 02:25:14,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:14,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 02:25:14,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:25:14,196 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 14 states. [2020-10-24 02:25:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:15,286 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-24 02:25:15,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 02:25:15,291 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-24 02:25:15,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:15,292 INFO L225 Difference]: With dead ends: 60 [2020-10-24 02:25:15,293 INFO L226 Difference]: Without dead ends: 54 [2020-10-24 02:25:15,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:25:15,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-24 02:25:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-10-24 02:25:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-24 02:25:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-24 02:25:15,311 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 45 [2020-10-24 02:25:15,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:15,311 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-24 02:25:15,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 02:25:15,311 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-24 02:25:15,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-24 02:25:15,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:15,313 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, 1, 1, 1, 1] [2020-10-24 02:25:15,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:25:15,314 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:15,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:15,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1507122150, now seen corresponding path program 6 times [2020-10-24 02:25:15,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:15,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015156408] [2020-10-24 02:25:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:15,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:15,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015156408] [2020-10-24 02:25:15,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:15,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:25:15,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762265301] [2020-10-24 02:25:15,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:25:15,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:15,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:25:15,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:25:15,658 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 16 states. [2020-10-24 02:25:16,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:16,978 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-24 02:25:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-24 02:25:16,978 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-24 02:25:16,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:16,981 INFO L225 Difference]: With dead ends: 65 [2020-10-24 02:25:16,981 INFO L226 Difference]: Without dead ends: 59 [2020-10-24 02:25:16,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 02:25:16,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-24 02:25:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-10-24 02:25:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-24 02:25:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-24 02:25:17,014 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 50 [2020-10-24 02:25:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:17,016 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-24 02:25:17,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:25:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-24 02:25:17,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-24 02:25:17,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:17,028 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, 1, 1, 1, 1] [2020-10-24 02:25:17,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:25:17,029 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash -472945079, now seen corresponding path program 7 times [2020-10-24 02:25:17,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:17,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852216693] [2020-10-24 02:25:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:17,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:17,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852216693] [2020-10-24 02:25:17,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:17,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:25:17,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821118635] [2020-10-24 02:25:17,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:25:17,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:17,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:25:17,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:25:17,493 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 18 states. [2020-10-24 02:25:19,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:19,109 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-24 02:25:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 02:25:19,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-24 02:25:19,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:19,111 INFO L225 Difference]: With dead ends: 70 [2020-10-24 02:25:19,112 INFO L226 Difference]: Without dead ends: 64 [2020-10-24 02:25:19,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:25:19,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-24 02:25:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-10-24 02:25:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-24 02:25:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-24 02:25:19,147 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 55 [2020-10-24 02:25:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:19,150 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-24 02:25:19,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:25:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-24 02:25:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-24 02:25:19,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:19,152 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, 1, 1, 1, 1] [2020-10-24 02:25:19,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:25:19,152 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:19,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:19,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1385161158, now seen corresponding path program 8 times [2020-10-24 02:25:19,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:19,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863395927] [2020-10-24 02:25:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:19,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:19,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863395927] [2020-10-24 02:25:19,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:19,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-24 02:25:19,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820666843] [2020-10-24 02:25:19,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 02:25:19,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:19,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 02:25:19,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:25:19,690 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 20 states. [2020-10-24 02:25:21,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:21,570 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-10-24 02:25:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-24 02:25:21,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-10-24 02:25:21,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:21,572 INFO L225 Difference]: With dead ends: 75 [2020-10-24 02:25:21,572 INFO L226 Difference]: Without dead ends: 69 [2020-10-24 02:25:21,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=224, Invalid=1756, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 02:25:21,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-24 02:25:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-24 02:25:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-24 02:25:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-10-24 02:25:21,592 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 60 [2020-10-24 02:25:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:21,593 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-10-24 02:25:21,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 02:25:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-10-24 02:25:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-24 02:25:21,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:21,594 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, 1, 1, 1, 1] [2020-10-24 02:25:21,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:25:21,595 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:21,595 INFO L82 PathProgramCache]: Analyzing trace with hash 778900585, now seen corresponding path program 9 times [2020-10-24 02:25:21,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:21,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383431184] [2020-10-24 02:25:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:22,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:22,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383431184] [2020-10-24 02:25:22,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:22,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 02:25:22,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669771267] [2020-10-24 02:25:22,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 02:25:22,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 02:25:22,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-10-24 02:25:22,132 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 22 states. [2020-10-24 02:25:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:24,329 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-24 02:25:24,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-24 02:25:24,330 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 65 [2020-10-24 02:25:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:24,331 INFO L225 Difference]: With dead ends: 80 [2020-10-24 02:25:24,331 INFO L226 Difference]: Without dead ends: 74 [2020-10-24 02:25:24,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2020-10-24 02:25:24,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-24 02:25:24,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-10-24 02:25:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-24 02:25:24,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-24 02:25:24,351 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 65 [2020-10-24 02:25:24,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:24,352 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-24 02:25:24,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 02:25:24,352 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-24 02:25:24,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-24 02:25:24,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:24,353 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, 1, 1, 1, 1] [2020-10-24 02:25:24,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:25:24,354 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:24,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:24,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1658515546, now seen corresponding path program 10 times [2020-10-24 02:25:24,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:24,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077832680] [2020-10-24 02:25:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:24,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:24,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077832680] [2020-10-24 02:25:24,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:24,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-24 02:25:24,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151388444] [2020-10-24 02:25:24,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-24 02:25:24,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:24,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-24 02:25:24,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-24 02:25:24,977 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 24 states. [2020-10-24 02:25:27,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:27,619 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2020-10-24 02:25:27,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-24 02:25:27,620 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2020-10-24 02:25:27,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:27,621 INFO L225 Difference]: With dead ends: 85 [2020-10-24 02:25:27,621 INFO L226 Difference]: Without dead ends: 79 [2020-10-24 02:25:27,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=278, Invalid=2692, Unknown=0, NotChecked=0, Total=2970 [2020-10-24 02:25:27,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-24 02:25:27,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-10-24 02:25:27,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-24 02:25:27,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-10-24 02:25:27,658 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 70 [2020-10-24 02:25:27,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:27,658 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-10-24 02:25:27,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-24 02:25:27,659 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-10-24 02:25:27,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-24 02:25:27,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:27,663 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, 1, 1, 1, 1] [2020-10-24 02:25:27,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:25:27,663 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2125884791, now seen corresponding path program 11 times [2020-10-24 02:25:27,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:27,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755512295] [2020-10-24 02:25:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:28,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:28,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755512295] [2020-10-24 02:25:28,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:28,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-24 02:25:28,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255435830] [2020-10-24 02:25:28,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-24 02:25:28,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:28,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-24 02:25:28,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-10-24 02:25:28,379 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 26 states. [2020-10-24 02:25:31,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:31,569 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-24 02:25:31,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-24 02:25:31,569 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-10-24 02:25:31,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:31,570 INFO L225 Difference]: With dead ends: 90 [2020-10-24 02:25:31,570 INFO L226 Difference]: Without dead ends: 84 [2020-10-24 02:25:31,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 02:25:31,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-24 02:25:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-10-24 02:25:31,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-24 02:25:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-10-24 02:25:31,592 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 75 [2020-10-24 02:25:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:31,593 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-10-24 02:25:31,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-24 02:25:31,593 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-10-24 02:25:31,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-24 02:25:31,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:31,594 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, 1, 1, 1, 1] [2020-10-24 02:25:31,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:25:31,595 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:31,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:31,595 INFO L82 PathProgramCache]: Analyzing trace with hash -318610042, now seen corresponding path program 12 times [2020-10-24 02:25:31,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:31,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836216439] [2020-10-24 02:25:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:32,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:32,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836216439] [2020-10-24 02:25:32,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:32,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-24 02:25:32,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522963013] [2020-10-24 02:25:32,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 02:25:32,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:32,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 02:25:32,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:25:32,393 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 28 states. [2020-10-24 02:25:35,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:35,902 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-10-24 02:25:35,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-24 02:25:35,903 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2020-10-24 02:25:35,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:35,904 INFO L225 Difference]: With dead ends: 95 [2020-10-24 02:25:35,904 INFO L226 Difference]: Without dead ends: 89 [2020-10-24 02:25:35,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=332, Invalid=3828, Unknown=0, NotChecked=0, Total=4160 [2020-10-24 02:25:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-24 02:25:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-10-24 02:25:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-24 02:25:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-10-24 02:25:35,926 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 80 [2020-10-24 02:25:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:35,927 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-10-24 02:25:35,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 02:25:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-10-24 02:25:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-24 02:25:35,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:35,928 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, 1, 1, 1, 1] [2020-10-24 02:25:35,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 02:25:35,928 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:35,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:35,929 INFO L82 PathProgramCache]: Analyzing trace with hash 498526377, now seen corresponding path program 13 times [2020-10-24 02:25:35,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:35,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114461294] [2020-10-24 02:25:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:36,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:36,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114461294] [2020-10-24 02:25:36,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:36,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-24 02:25:36,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068710879] [2020-10-24 02:25:36,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-24 02:25:36,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-24 02:25:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:25:36,836 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 30 states. [2020-10-24 02:25:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:40,873 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-24 02:25:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-24 02:25:40,874 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2020-10-24 02:25:40,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:40,875 INFO L225 Difference]: With dead ends: 100 [2020-10-24 02:25:40,875 INFO L226 Difference]: Without dead ends: 94 [2020-10-24 02:25:40,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=359, Invalid=4471, Unknown=0, NotChecked=0, Total=4830 [2020-10-24 02:25:40,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-24 02:25:40,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-10-24 02:25:40,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-24 02:25:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-10-24 02:25:40,902 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 85 [2020-10-24 02:25:40,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:40,902 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-10-24 02:25:40,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-24 02:25:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-10-24 02:25:40,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-24 02:25:40,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:40,903 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, 1, 1, 1, 1] [2020-10-24 02:25:40,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 02:25:40,904 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:40,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:40,904 INFO L82 PathProgramCache]: Analyzing trace with hash 68543334, now seen corresponding path program 14 times [2020-10-24 02:25:40,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:40,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209526890] [2020-10-24 02:25:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:41,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:41,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209526890] [2020-10-24 02:25:41,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:41,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-24 02:25:41,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256839981] [2020-10-24 02:25:41,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-24 02:25:41,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:41,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-24 02:25:41,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-10-24 02:25:41,899 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 32 states. [2020-10-24 02:25:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:46,425 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2020-10-24 02:25:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-24 02:25:46,426 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 90 [2020-10-24 02:25:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:46,427 INFO L225 Difference]: With dead ends: 105 [2020-10-24 02:25:46,427 INFO L226 Difference]: Without dead ends: 99 [2020-10-24 02:25:46,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=386, Invalid=5164, Unknown=0, NotChecked=0, Total=5550 [2020-10-24 02:25:46,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-24 02:25:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2020-10-24 02:25:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-24 02:25:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-10-24 02:25:46,453 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 90 [2020-10-24 02:25:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:46,454 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-10-24 02:25:46,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-24 02:25:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-10-24 02:25:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-24 02:25:46,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:46,455 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, 1, 1, 1, 1] [2020-10-24 02:25:46,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 02:25:46,455 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1183258313, now seen corresponding path program 15 times [2020-10-24 02:25:46,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:46,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633845613] [2020-10-24 02:25:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:47,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:47,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633845613] [2020-10-24 02:25:47,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:47,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-24 02:25:47,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281602105] [2020-10-24 02:25:47,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-24 02:25:47,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:47,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-24 02:25:47,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 02:25:47,638 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 34 states. [2020-10-24 02:25:52,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:52,757 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-10-24 02:25:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-24 02:25:52,758 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 95 [2020-10-24 02:25:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:52,759 INFO L225 Difference]: With dead ends: 110 [2020-10-24 02:25:52,759 INFO L226 Difference]: Without dead ends: 104 [2020-10-24 02:25:52,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=413, Invalid=5907, Unknown=0, NotChecked=0, Total=6320 [2020-10-24 02:25:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-24 02:25:52,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2020-10-24 02:25:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-24 02:25:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-10-24 02:25:52,782 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 95 [2020-10-24 02:25:52,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:52,782 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-10-24 02:25:52,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-24 02:25:52,782 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-10-24 02:25:52,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-24 02:25:52,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:52,783 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, 1, 1, 1, 1] [2020-10-24 02:25:52,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 02:25:52,784 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:52,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:52,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1832023738, now seen corresponding path program 16 times [2020-10-24 02:25:52,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:52,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133264232] [2020-10-24 02:25:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:53,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:54,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133264232] [2020-10-24 02:25:54,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:54,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-24 02:25:54,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847223902] [2020-10-24 02:25:54,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-24 02:25:54,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:54,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-24 02:25:54,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 02:25:54,013 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 36 states. [2020-10-24 02:25:59,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:59,680 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2020-10-24 02:25:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-24 02:25:59,681 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 100 [2020-10-24 02:25:59,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:59,683 INFO L225 Difference]: With dead ends: 115 [2020-10-24 02:25:59,683 INFO L226 Difference]: Without dead ends: 109 [2020-10-24 02:25:59,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=440, Invalid=6700, Unknown=0, NotChecked=0, Total=7140 [2020-10-24 02:25:59,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-24 02:25:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2020-10-24 02:25:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-24 02:25:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2020-10-24 02:25:59,707 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 100 [2020-10-24 02:25:59,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:59,707 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2020-10-24 02:25:59,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-24 02:25:59,707 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2020-10-24 02:25:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-24 02:25:59,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:59,709 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, 1, 1, 1, 1] [2020-10-24 02:25:59,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 02:25:59,709 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:59,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:59,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1611406569, now seen corresponding path program 17 times [2020-10-24 02:25:59,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:59,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785820710] [2020-10-24 02:25:59,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:00,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:00,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785820710] [2020-10-24 02:26:00,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:00,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-24 02:26:00,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674350510] [2020-10-24 02:26:00,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-24 02:26:00,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:00,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-24 02:26:00,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 02:26:00,934 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 38 states. [2020-10-24 02:26:07,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:07,130 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-24 02:26:07,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-24 02:26:07,131 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 105 [2020-10-24 02:26:07,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:07,133 INFO L225 Difference]: With dead ends: 120 [2020-10-24 02:26:07,133 INFO L226 Difference]: Without dead ends: 114 [2020-10-24 02:26:07,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=467, Invalid=7543, Unknown=0, NotChecked=0, Total=8010 [2020-10-24 02:26:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-24 02:26:07,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-10-24 02:26:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-24 02:26:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-10-24 02:26:07,162 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 105 [2020-10-24 02:26:07,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:07,162 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-10-24 02:26:07,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-24 02:26:07,162 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-10-24 02:26:07,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-24 02:26:07,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:07,164 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, 1, 1, 1, 1] [2020-10-24 02:26:07,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 02:26:07,164 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:07,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:07,164 INFO L82 PathProgramCache]: Analyzing trace with hash 404182822, now seen corresponding path program 18 times [2020-10-24 02:26:07,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:07,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823363762] [2020-10-24 02:26:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:08,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:08,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823363762] [2020-10-24 02:26:08,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:08,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-24 02:26:08,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066265386] [2020-10-24 02:26:08,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-24 02:26:08,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:08,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-24 02:26:08,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:26:08,702 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 40 states. [2020-10-24 02:26:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:15,590 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2020-10-24 02:26:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-24 02:26:15,591 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 110 [2020-10-24 02:26:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:15,593 INFO L225 Difference]: With dead ends: 125 [2020-10-24 02:26:15,593 INFO L226 Difference]: Without dead ends: 119 [2020-10-24 02:26:15,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=494, Invalid=8436, Unknown=0, NotChecked=0, Total=8930 [2020-10-24 02:26:15,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-24 02:26:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2020-10-24 02:26:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-24 02:26:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-10-24 02:26:15,623 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 110 [2020-10-24 02:26:15,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:15,624 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-10-24 02:26:15,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-24 02:26:15,624 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-10-24 02:26:15,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-24 02:26:15,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:15,625 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, 1, 1, 1, 1] [2020-10-24 02:26:15,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 02:26:15,626 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:15,626 INFO L82 PathProgramCache]: Analyzing trace with hash 270007049, now seen corresponding path program 19 times [2020-10-24 02:26:15,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:15,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122619127] [2020-10-24 02:26:15,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:17,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:17,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122619127] [2020-10-24 02:26:17,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:17,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-24 02:26:17,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085006322] [2020-10-24 02:26:17,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-24 02:26:17,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:17,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-24 02:26:17,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1622, Unknown=0, NotChecked=0, Total=1722 [2020-10-24 02:26:17,331 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 42 states. [2020-10-24 02:26:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:24,986 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-10-24 02:26:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-24 02:26:24,986 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 115 [2020-10-24 02:26:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:24,988 INFO L225 Difference]: With dead ends: 130 [2020-10-24 02:26:24,988 INFO L226 Difference]: Without dead ends: 124 [2020-10-24 02:26:24,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=521, Invalid=9379, Unknown=0, NotChecked=0, Total=9900 [2020-10-24 02:26:24,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-24 02:26:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2020-10-24 02:26:25,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-24 02:26:25,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-10-24 02:26:25,024 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 115 [2020-10-24 02:26:25,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:25,024 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-10-24 02:26:25,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-24 02:26:25,025 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-10-24 02:26:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-24 02:26:25,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:25,026 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, 1, 1, 1, 1] [2020-10-24 02:26:25,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 02:26:25,026 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:25,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1050587898, now seen corresponding path program 20 times [2020-10-24 02:26:25,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:25,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696572236] [2020-10-24 02:26:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:26,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:26,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696572236] [2020-10-24 02:26:26,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:26,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-24 02:26:26,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360149498] [2020-10-24 02:26:26,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-24 02:26:26,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:26,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-24 02:26:26,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 02:26:26,890 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 44 states. [2020-10-24 02:26:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:35,253 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2020-10-24 02:26:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-24 02:26:35,254 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 120 [2020-10-24 02:26:35,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:35,255 INFO L225 Difference]: With dead ends: 135 [2020-10-24 02:26:35,255 INFO L226 Difference]: Without dead ends: 129 [2020-10-24 02:26:35,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=548, Invalid=10372, Unknown=0, NotChecked=0, Total=10920 [2020-10-24 02:26:35,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-24 02:26:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2020-10-24 02:26:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-24 02:26:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2020-10-24 02:26:35,298 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 120 [2020-10-24 02:26:35,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:35,299 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2020-10-24 02:26:35,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-24 02:26:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2020-10-24 02:26:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-24 02:26:35,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:35,300 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, 1, 1, 1, 1] [2020-10-24 02:26:35,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-24 02:26:35,300 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:35,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:35,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1576841513, now seen corresponding path program 21 times [2020-10-24 02:26:35,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:35,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545442858] [2020-10-24 02:26:35,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:37,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:37,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545442858] [2020-10-24 02:26:37,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:37,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-24 02:26:37,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841460924] [2020-10-24 02:26:37,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-24 02:26:37,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:37,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-24 02:26:37,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1960, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 02:26:37,206 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 46 states. [2020-10-24 02:26:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:46,332 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-10-24 02:26:46,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-24 02:26:46,336 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 125 [2020-10-24 02:26:46,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:46,337 INFO L225 Difference]: With dead ends: 140 [2020-10-24 02:26:46,337 INFO L226 Difference]: Without dead ends: 134 [2020-10-24 02:26:46,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=575, Invalid=11415, Unknown=0, NotChecked=0, Total=11990 [2020-10-24 02:26:46,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-24 02:26:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-24 02:26:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-24 02:26:46,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-10-24 02:26:46,371 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 125 [2020-10-24 02:26:46,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:46,371 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-10-24 02:26:46,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-24 02:26:46,371 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-10-24 02:26:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-24 02:26:46,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:46,373 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, 1, 1, 1, 1] [2020-10-24 02:26:46,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-24 02:26:46,373 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:46,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:46,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1251568358, now seen corresponding path program 22 times [2020-10-24 02:26:46,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:46,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147102469] [2020-10-24 02:26:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:48,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:26:48,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147102469] [2020-10-24 02:26:48,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:48,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-24 02:26:48,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509582799] [2020-10-24 02:26:48,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-24 02:26:48,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:48,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-24 02:26:48,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2020-10-24 02:26:48,590 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 48 states. [2020-10-24 02:26:58,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:58,449 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2020-10-24 02:26:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-24 02:26:58,450 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 130 [2020-10-24 02:26:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:58,452 INFO L225 Difference]: With dead ends: 145 [2020-10-24 02:26:58,452 INFO L226 Difference]: Without dead ends: 139 [2020-10-24 02:26:58,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=602, Invalid=12508, Unknown=0, NotChecked=0, Total=13110 [2020-10-24 02:26:58,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-24 02:26:58,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2020-10-24 02:26:58,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-24 02:26:58,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2020-10-24 02:26:58,492 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 130 [2020-10-24 02:26:58,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:58,492 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2020-10-24 02:26:58,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-24 02:26:58,492 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2020-10-24 02:26:58,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-24 02:26:58,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:58,493 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, 1, 1, 1, 1] [2020-10-24 02:26:58,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-24 02:26:58,494 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:58,494 INFO L82 PathProgramCache]: Analyzing trace with hash -762560695, now seen corresponding path program 23 times [2020-10-24 02:26:58,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:58,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019936113] [2020-10-24 02:26:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:00,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:27:00,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019936113] [2020-10-24 02:27:00,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:00,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-24 02:27:00,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974200472] [2020-10-24 02:27:00,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-24 02:27:00,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:00,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-24 02:27:00,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2020-10-24 02:27:00,870 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 50 states. [2020-10-24 02:27:11,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:11,518 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-10-24 02:27:11,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-24 02:27:11,519 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 135 [2020-10-24 02:27:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:11,521 INFO L225 Difference]: With dead ends: 150 [2020-10-24 02:27:11,521 INFO L226 Difference]: Without dead ends: 144 [2020-10-24 02:27:11,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=629, Invalid=13651, Unknown=0, NotChecked=0, Total=14280 [2020-10-24 02:27:11,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-24 02:27:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2020-10-24 02:27:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-24 02:27:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2020-10-24 02:27:11,555 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 135 [2020-10-24 02:27:11,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:11,556 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2020-10-24 02:27:11,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-24 02:27:11,556 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2020-10-24 02:27:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-24 02:27:11,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:11,557 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, 1, 1, 1, 1] [2020-10-24 02:27:11,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-24 02:27:11,558 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:11,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:11,558 INFO L82 PathProgramCache]: Analyzing trace with hash -567430970, now seen corresponding path program 24 times [2020-10-24 02:27:11,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:11,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938189599] [2020-10-24 02:27:11,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:14,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:27:14,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938189599] [2020-10-24 02:27:14,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:14,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-24 02:27:14,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356158115] [2020-10-24 02:27:14,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-24 02:27:14,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:14,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-24 02:27:14,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-10-24 02:27:14,147 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 52 states. [2020-10-24 02:27:25,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:25,236 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2020-10-24 02:27:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-24 02:27:25,237 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 140 [2020-10-24 02:27:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:25,239 INFO L225 Difference]: With dead ends: 155 [2020-10-24 02:27:25,239 INFO L226 Difference]: Without dead ends: 149 [2020-10-24 02:27:25,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=656, Invalid=14844, Unknown=0, NotChecked=0, Total=15500 [2020-10-24 02:27:25,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-24 02:27:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-10-24 02:27:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-24 02:27:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2020-10-24 02:27:25,280 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 140 [2020-10-24 02:27:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:25,281 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2020-10-24 02:27:25,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-24 02:27:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2020-10-24 02:27:25,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-24 02:27:25,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:25,282 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, 1, 1, 1, 1] [2020-10-24 02:27:25,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-24 02:27:25,282 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:25,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:25,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1743215255, now seen corresponding path program 25 times [2020-10-24 02:27:25,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:25,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355063394] [2020-10-24 02:27:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:27,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:27:27,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355063394] [2020-10-24 02:27:27,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:27,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-24 02:27:27,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567867482] [2020-10-24 02:27:27,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-24 02:27:27,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:27,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-24 02:27:27,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2020-10-24 02:27:27,999 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 54 states. [2020-10-24 02:27:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:40,788 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2020-10-24 02:27:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-24 02:27:40,788 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 145 [2020-10-24 02:27:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:40,790 INFO L225 Difference]: With dead ends: 160 [2020-10-24 02:27:40,791 INFO L226 Difference]: Without dead ends: 154 [2020-10-24 02:27:40,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=683, Invalid=16087, Unknown=0, NotChecked=0, Total=16770 [2020-10-24 02:27:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-24 02:27:40,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2020-10-24 02:27:40,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-24 02:27:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2020-10-24 02:27:40,832 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 145 [2020-10-24 02:27:40,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:40,833 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2020-10-24 02:27:40,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-24 02:27:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2020-10-24 02:27:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-24 02:27:40,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:40,834 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, 1, 1, 1, 1] [2020-10-24 02:27:40,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-24 02:27:40,834 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:40,835 INFO L82 PathProgramCache]: Analyzing trace with hash -183755098, now seen corresponding path program 26 times [2020-10-24 02:27:40,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:40,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070479150] [2020-10-24 02:27:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:43,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:27:43,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070479150] [2020-10-24 02:27:43,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:43,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-24 02:27:43,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566734645] [2020-10-24 02:27:43,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-24 02:27:43,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:43,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-24 02:27:43,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2945, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 02:27:43,868 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 56 states. [2020-10-24 02:27:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:57,376 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2020-10-24 02:27:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-24 02:27:57,377 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 150 [2020-10-24 02:27:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:57,379 INFO L225 Difference]: With dead ends: 165 [2020-10-24 02:27:57,379 INFO L226 Difference]: Without dead ends: 159 [2020-10-24 02:27:57,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=710, Invalid=17380, Unknown=0, NotChecked=0, Total=18090 [2020-10-24 02:27:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-24 02:27:57,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2020-10-24 02:27:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-24 02:27:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2020-10-24 02:27:57,418 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 150 [2020-10-24 02:27:57,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:57,418 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2020-10-24 02:27:57,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-24 02:27:57,418 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2020-10-24 02:27:57,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-24 02:27:57,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:57,419 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, 1, 1, 1, 1] [2020-10-24 02:27:57,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-24 02:27:57,419 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:57,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:57,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1703681143, now seen corresponding path program 27 times [2020-10-24 02:27:57,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:57,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670822520] [2020-10-24 02:27:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:00,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:00,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670822520] [2020-10-24 02:28:00,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:00,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-24 02:28:00,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100781219] [2020-10-24 02:28:00,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-24 02:28:00,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:00,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-24 02:28:00,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3166, Unknown=0, NotChecked=0, Total=3306 [2020-10-24 02:28:00,666 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 58 states. [2020-10-24 02:28:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:15,200 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2020-10-24 02:28:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-24 02:28:15,201 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 155 [2020-10-24 02:28:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:15,203 INFO L225 Difference]: With dead ends: 170 [2020-10-24 02:28:15,203 INFO L226 Difference]: Without dead ends: 164 [2020-10-24 02:28:15,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3322 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=737, Invalid=18723, Unknown=0, NotChecked=0, Total=19460 [2020-10-24 02:28:15,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-24 02:28:15,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2020-10-24 02:28:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-24 02:28:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2020-10-24 02:28:15,240 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 155 [2020-10-24 02:28:15,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:15,241 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2020-10-24 02:28:15,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-24 02:28:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2020-10-24 02:28:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-24 02:28:15,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:15,242 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, 1, 1, 1, 1] [2020-10-24 02:28:15,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-24 02:28:15,242 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:15,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:15,243 INFO L82 PathProgramCache]: Analyzing trace with hash 916632710, now seen corresponding path program 28 times [2020-10-24 02:28:15,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:15,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459803371] [2020-10-24 02:28:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:18,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:18,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459803371] [2020-10-24 02:28:18,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:18,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-24 02:28:18,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493234034] [2020-10-24 02:28:18,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-24 02:28:18,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:18,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-24 02:28:18,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 02:28:18,721 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 60 states. [2020-10-24 02:28:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:34,230 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2020-10-24 02:28:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-24 02:28:34,231 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 160 [2020-10-24 02:28:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:34,233 INFO L225 Difference]: With dead ends: 175 [2020-10-24 02:28:34,233 INFO L226 Difference]: Without dead ends: 169 [2020-10-24 02:28:34,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=764, Invalid=20116, Unknown=0, NotChecked=0, Total=20880 [2020-10-24 02:28:34,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-24 02:28:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2020-10-24 02:28:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-24 02:28:34,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2020-10-24 02:28:34,273 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 160 [2020-10-24 02:28:34,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:34,273 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2020-10-24 02:28:34,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-24 02:28:34,274 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2020-10-24 02:28:34,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-24 02:28:34,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:34,275 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, 1, 1, 1, 1] [2020-10-24 02:28:34,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-24 02:28:34,275 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:34,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1494222423, now seen corresponding path program 29 times [2020-10-24 02:28:34,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:34,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779905231] [2020-10-24 02:28:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:37,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:37,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779905231] [2020-10-24 02:28:37,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:37,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-24 02:28:37,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146589674] [2020-10-24 02:28:37,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-24 02:28:37,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:37,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-24 02:28:37,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2020-10-24 02:28:37,998 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 62 states. [2020-10-24 02:28:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:54,692 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2020-10-24 02:28:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-24 02:28:54,693 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 165 [2020-10-24 02:28:54,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:54,694 INFO L225 Difference]: With dead ends: 180 [2020-10-24 02:28:54,695 INFO L226 Difference]: Without dead ends: 174 [2020-10-24 02:28:54,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=791, Invalid=21559, Unknown=0, NotChecked=0, Total=22350 [2020-10-24 02:28:54,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-24 02:28:54,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-10-24 02:28:54,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-24 02:28:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2020-10-24 02:28:54,741 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 165 [2020-10-24 02:28:54,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:54,741 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2020-10-24 02:28:54,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-24 02:28:54,742 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2020-10-24 02:28:54,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-24 02:28:54,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:54,743 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, 1, 1, 1, 1] [2020-10-24 02:28:54,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-24 02:28:54,743 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:54,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:54,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1491038822, now seen corresponding path program 30 times [2020-10-24 02:28:54,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:54,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055590327] [2020-10-24 02:28:54,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:58,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:58,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055590327] [2020-10-24 02:28:58,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:58,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-24 02:28:58,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802412477] [2020-10-24 02:28:58,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-24 02:28:58,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:58,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-24 02:28:58,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3877, Unknown=0, NotChecked=0, Total=4032 [2020-10-24 02:28:58,834 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 64 states. [2020-10-24 02:29:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:16,744 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2020-10-24 02:29:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-10-24 02:29:16,746 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 170 [2020-10-24 02:29:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:16,748 INFO L225 Difference]: With dead ends: 185 [2020-10-24 02:29:16,748 INFO L226 Difference]: Without dead ends: 179 [2020-10-24 02:29:16,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=818, Invalid=23052, Unknown=0, NotChecked=0, Total=23870 [2020-10-24 02:29:16,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-24 02:29:16,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2020-10-24 02:29:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-24 02:29:16,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2020-10-24 02:29:16,789 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 170 [2020-10-24 02:29:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:16,789 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2020-10-24 02:29:16,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-24 02:29:16,789 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2020-10-24 02:29:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-24 02:29:16,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:16,790 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, 1, 1, 1, 1] [2020-10-24 02:29:16,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-24 02:29:16,791 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:16,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:16,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1939937335, now seen corresponding path program 31 times [2020-10-24 02:29:16,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:16,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570699886] [2020-10-24 02:29:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:21,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:21,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570699886] [2020-10-24 02:29:21,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:21,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-24 02:29:21,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683256441] [2020-10-24 02:29:21,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-24 02:29:21,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:21,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-24 02:29:21,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=4130, Unknown=0, NotChecked=0, Total=4290 [2020-10-24 02:29:21,082 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 66 states. [2020-10-24 02:29:40,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:40,232 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2020-10-24 02:29:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-10-24 02:29:40,233 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 175 [2020-10-24 02:29:40,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:40,236 INFO L225 Difference]: With dead ends: 190 [2020-10-24 02:29:40,236 INFO L226 Difference]: Without dead ends: 184 [2020-10-24 02:29:40,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4372 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=845, Invalid=24595, Unknown=0, NotChecked=0, Total=25440 [2020-10-24 02:29:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-24 02:29:40,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2020-10-24 02:29:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-24 02:29:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2020-10-24 02:29:40,302 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 175 [2020-10-24 02:29:40,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:40,302 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2020-10-24 02:29:40,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-24 02:29:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2020-10-24 02:29:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-24 02:29:40,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:40,304 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, 1, 1, 1, 1] [2020-10-24 02:29:40,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-24 02:29:40,304 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash 3168326, now seen corresponding path program 32 times [2020-10-24 02:29:40,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:40,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423528651] [2020-10-24 02:29:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:44,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:44,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423528651] [2020-10-24 02:29:44,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:44,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-24 02:29:44,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580992995] [2020-10-24 02:29:44,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-24 02:29:44,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:44,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-24 02:29:44,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2020-10-24 02:29:44,969 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 68 states. [2020-10-24 02:30:05,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:05,447 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2020-10-24 02:30:05,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-10-24 02:30:05,448 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 180 [2020-10-24 02:30:05,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:05,451 INFO L225 Difference]: With dead ends: 195 [2020-10-24 02:30:05,451 INFO L226 Difference]: Without dead ends: 189 [2020-10-24 02:30:05,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4657 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=872, Invalid=26188, Unknown=0, NotChecked=0, Total=27060 [2020-10-24 02:30:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-24 02:30:05,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2020-10-24 02:30:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-24 02:30:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2020-10-24 02:30:05,527 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 180 [2020-10-24 02:30:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:05,527 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2020-10-24 02:30:05,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-24 02:30:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2020-10-24 02:30:05,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-24 02:30:05,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:05,529 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, 1, 1, 1, 1] [2020-10-24 02:30:05,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-24 02:30:05,530 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:05,530 INFO L82 PathProgramCache]: Analyzing trace with hash 991079913, now seen corresponding path program 33 times [2020-10-24 02:30:05,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:05,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266442237] [2020-10-24 02:30:05,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:10,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:10,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266442237] [2020-10-24 02:30:10,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:10,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-24 02:30:10,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837698899] [2020-10-24 02:30:10,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-24 02:30:10,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:10,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-24 02:30:10,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4660, Unknown=0, NotChecked=0, Total=4830 [2020-10-24 02:30:10,604 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 70 states. [2020-10-24 02:30:32,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:32,675 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2020-10-24 02:30:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-10-24 02:30:32,677 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 185 [2020-10-24 02:30:32,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:32,679 INFO L225 Difference]: With dead ends: 200 [2020-10-24 02:30:32,679 INFO L226 Difference]: Without dead ends: 194 [2020-10-24 02:30:32,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=899, Invalid=27831, Unknown=0, NotChecked=0, Total=28730 [2020-10-24 02:30:32,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-24 02:30:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2020-10-24 02:30:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-24 02:30:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2020-10-24 02:30:32,739 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 185 [2020-10-24 02:30:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:32,739 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2020-10-24 02:30:32,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-24 02:30:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2020-10-24 02:30:32,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-24 02:30:32,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:32,741 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, 1, 1, 1, 1] [2020-10-24 02:30:32,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-24 02:30:32,741 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:32,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:32,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1618778586, now seen corresponding path program 34 times [2020-10-24 02:30:32,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:32,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855892034] [2020-10-24 02:30:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:38,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:38,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855892034] [2020-10-24 02:30:38,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:38,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-24 02:30:38,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673143214] [2020-10-24 02:30:38,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-24 02:30:38,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:38,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-24 02:30:38,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4937, Unknown=0, NotChecked=0, Total=5112 [2020-10-24 02:30:38,270 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 72 states. [2020-10-24 02:31:01,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:01,963 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2020-10-24 02:31:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-24 02:31:01,965 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 190 [2020-10-24 02:31:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:01,966 INFO L225 Difference]: With dead ends: 205 [2020-10-24 02:31:01,967 INFO L226 Difference]: Without dead ends: 199 [2020-10-24 02:31:01,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5254 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=926, Invalid=29524, Unknown=0, NotChecked=0, Total=30450 [2020-10-24 02:31:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-24 02:31:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2020-10-24 02:31:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-24 02:31:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2020-10-24 02:31:02,051 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 190 [2020-10-24 02:31:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:02,051 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2020-10-24 02:31:02,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-24 02:31:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2020-10-24 02:31:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-24 02:31:02,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:02,053 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, 1, 1, 1, 1] [2020-10-24 02:31:02,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-24 02:31:02,053 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:02,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:02,054 INFO L82 PathProgramCache]: Analyzing trace with hash -455259127, now seen corresponding path program 35 times [2020-10-24 02:31:02,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:02,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004212244] [2020-10-24 02:31:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:08,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:08,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004212244] [2020-10-24 02:31:08,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:08,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-24 02:31:08,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973121282] [2020-10-24 02:31:08,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-24 02:31:08,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:08,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-24 02:31:08,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=5222, Unknown=0, NotChecked=0, Total=5402 [2020-10-24 02:31:08,171 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 74 states. [2020-10-24 02:31:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:33,356 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2020-10-24 02:31:33,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-10-24 02:31:33,357 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 195 [2020-10-24 02:31:33,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:33,358 INFO L225 Difference]: With dead ends: 210 [2020-10-24 02:31:33,358 INFO L226 Difference]: Without dead ends: 204 [2020-10-24 02:31:33,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5566 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=953, Invalid=31267, Unknown=0, NotChecked=0, Total=32220 [2020-10-24 02:31:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-24 02:31:33,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2020-10-24 02:31:33,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-24 02:31:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2020-10-24 02:31:33,429 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 195 [2020-10-24 02:31:33,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:33,430 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2020-10-24 02:31:33,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-24 02:31:33,430 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2020-10-24 02:31:33,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-24 02:31:33,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:33,431 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, 1, 1, 1, 1] [2020-10-24 02:31:33,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-24 02:31:33,431 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:33,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:33,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1481022470, now seen corresponding path program 36 times [2020-10-24 02:31:33,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:33,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755212346] [2020-10-24 02:31:33,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:40,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:40,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755212346] [2020-10-24 02:31:40,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:40,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-24 02:31:40,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745413049] [2020-10-24 02:31:40,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-24 02:31:40,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:40,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-24 02:31:40,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=5515, Unknown=0, NotChecked=0, Total=5700 [2020-10-24 02:31:40,090 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 76 states. [2020-10-24 02:32:07,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:07,373 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2020-10-24 02:32:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-10-24 02:32:07,375 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 200 [2020-10-24 02:32:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:07,377 INFO L225 Difference]: With dead ends: 215 [2020-10-24 02:32:07,377 INFO L226 Difference]: Without dead ends: 209 [2020-10-24 02:32:07,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5887 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=980, Invalid=33060, Unknown=0, NotChecked=0, Total=34040 [2020-10-24 02:32:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-24 02:32:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2020-10-24 02:32:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-24 02:32:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2020-10-24 02:32:07,450 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 200 [2020-10-24 02:32:07,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:07,450 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2020-10-24 02:32:07,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-24 02:32:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2020-10-24 02:32:07,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-24 02:32:07,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:07,452 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, 1, 1, 1, 1] [2020-10-24 02:32:07,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-24 02:32:07,452 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:07,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:07,452 INFO L82 PathProgramCache]: Analyzing trace with hash 487637545, now seen corresponding path program 37 times [2020-10-24 02:32:07,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:07,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984507420] [2020-10-24 02:32:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:14,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:32:14,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984507420] [2020-10-24 02:32:14,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:14,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-24 02:32:14,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718492656] [2020-10-24 02:32:14,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-24 02:32:14,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:14,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-24 02:32:14,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5816, Unknown=0, NotChecked=0, Total=6006 [2020-10-24 02:32:14,852 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 78 states. [2020-10-24 02:32:44,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:44,457 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2020-10-24 02:32:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-10-24 02:32:44,459 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 205 [2020-10-24 02:32:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:44,461 INFO L225 Difference]: With dead ends: 220 [2020-10-24 02:32:44,461 INFO L226 Difference]: Without dead ends: 214 [2020-10-24 02:32:44,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=1007, Invalid=34903, Unknown=0, NotChecked=0, Total=35910 [2020-10-24 02:32:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-24 02:32:44,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2020-10-24 02:32:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-24 02:32:44,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2020-10-24 02:32:44,539 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 205 [2020-10-24 02:32:44,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:44,540 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2020-10-24 02:32:44,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-24 02:32:44,540 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2020-10-24 02:32:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-24 02:32:44,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:44,542 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, 1, 1, 1, 1] [2020-10-24 02:32:44,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-24 02:32:44,542 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:44,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:44,542 INFO L82 PathProgramCache]: Analyzing trace with hash -630720026, now seen corresponding path program 38 times [2020-10-24 02:32:44,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:44,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997887417] [2020-10-24 02:32:44,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:52,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:32:52,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997887417] [2020-10-24 02:32:52,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:52,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-24 02:32:52,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103431843] [2020-10-24 02:32:52,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-24 02:32:52,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:52,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-24 02:32:52,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=6125, Unknown=0, NotChecked=0, Total=6320 [2020-10-24 02:32:52,647 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 80 states. [2020-10-24 02:33:25,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:33:25,054 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2020-10-24 02:33:25,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-10-24 02:33:25,055 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 210 [2020-10-24 02:33:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:33:25,057 INFO L225 Difference]: With dead ends: 225 [2020-10-24 02:33:25,057 INFO L226 Difference]: Without dead ends: 219 [2020-10-24 02:33:25,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6556 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=1034, Invalid=36796, Unknown=0, NotChecked=0, Total=37830 [2020-10-24 02:33:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-24 02:33:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2020-10-24 02:33:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-24 02:33:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2020-10-24 02:33:25,142 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 210 [2020-10-24 02:33:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:25,142 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2020-10-24 02:33:25,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-24 02:33:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2020-10-24 02:33:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-24 02:33:25,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:25,144 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, 1, 1, 1, 1] [2020-10-24 02:33:25,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-24 02:33:25,144 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:25,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:25,145 INFO L82 PathProgramCache]: Analyzing trace with hash -125890487, now seen corresponding path program 39 times [2020-10-24 02:33:25,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:25,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496203037] [2020-10-24 02:33:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:34,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:33:34,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496203037] [2020-10-24 02:33:34,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:34,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-24 02:33:34,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792242030] [2020-10-24 02:33:34,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-24 02:33:34,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:34,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-24 02:33:34,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=6442, Unknown=0, NotChecked=0, Total=6642 [2020-10-24 02:33:34,151 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand 82 states. [2020-10-24 02:34:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:34:09,951 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2020-10-24 02:34:09,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-10-24 02:34:09,953 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 215 [2020-10-24 02:34:09,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:34:09,954 INFO L225 Difference]: With dead ends: 230 [2020-10-24 02:34:09,955 INFO L226 Difference]: Without dead ends: 224 [2020-10-24 02:34:09,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6904 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=1061, Invalid=38739, Unknown=0, NotChecked=0, Total=39800 [2020-10-24 02:34:09,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-24 02:34:10,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2020-10-24 02:34:10,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-24 02:34:10,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2020-10-24 02:34:10,013 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 215 [2020-10-24 02:34:10,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:34:10,013 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2020-10-24 02:34:10,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-24 02:34:10,013 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2020-10-24 02:34:10,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-24 02:34:10,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:34:10,015 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, 1, 1, 1, 1] [2020-10-24 02:34:10,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-24 02:34:10,015 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:34:10,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:34:10,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1146453958, now seen corresponding path program 40 times [2020-10-24 02:34:10,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:34:10,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921202993] [2020-10-24 02:34:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:34:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:19,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:34:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:34:19,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921202993] [2020-10-24 02:34:19,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:34:19,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-24 02:34:19,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778904205] [2020-10-24 02:34:19,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-24 02:34:19,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:34:19,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-24 02:34:19,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6767, Unknown=0, NotChecked=0, Total=6972 [2020-10-24 02:34:19,791 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 84 states. [2020-10-24 02:34:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:34:59,857 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2020-10-24 02:34:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-10-24 02:34:59,859 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 220 [2020-10-24 02:34:59,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:34:59,862 INFO L225 Difference]: With dead ends: 235 [2020-10-24 02:34:59,862 INFO L226 Difference]: Without dead ends: 229 [2020-10-24 02:34:59,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7261 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=1088, Invalid=40732, Unknown=0, NotChecked=0, Total=41820 [2020-10-24 02:34:59,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-24 02:34:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2020-10-24 02:34:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-24 02:34:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 226 transitions. [2020-10-24 02:34:59,958 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 226 transitions. Word has length 220 [2020-10-24 02:34:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:34:59,958 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 226 transitions. [2020-10-24 02:34:59,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-24 02:34:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 226 transitions. [2020-10-24 02:34:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-24 02:34:59,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:34:59,959 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, 1, 1, 1, 1] [2020-10-24 02:34:59,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-24 02:34:59,960 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:34:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:34:59,960 INFO L82 PathProgramCache]: Analyzing trace with hash 762984041, now seen corresponding path program 41 times [2020-10-24 02:34:59,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:34:59,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254915760] [2020-10-24 02:34:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:34:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:10,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:35:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:35:10,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254915760] [2020-10-24 02:35:10,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:35:10,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-24 02:35:10,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969476110] [2020-10-24 02:35:10,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-24 02:35:10,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:35:10,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-24 02:35:10,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=7100, Unknown=0, NotChecked=0, Total=7310 [2020-10-24 02:35:10,888 INFO L87 Difference]: Start difference. First operand 226 states and 226 transitions. Second operand 86 states. [2020-10-24 02:35:55,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:35:55,998 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2020-10-24 02:35:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-10-24 02:35:56,000 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 225 [2020-10-24 02:35:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:35:56,002 INFO L225 Difference]: With dead ends: 240 [2020-10-24 02:35:56,002 INFO L226 Difference]: Without dead ends: 234 [2020-10-24 02:35:56,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7627 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=1115, Invalid=42775, Unknown=0, NotChecked=0, Total=43890 [2020-10-24 02:35:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-24 02:35:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 231. [2020-10-24 02:35:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-24 02:35:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2020-10-24 02:35:56,089 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 225 [2020-10-24 02:35:56,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:35:56,090 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2020-10-24 02:35:56,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-24 02:35:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2020-10-24 02:35:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-24 02:35:56,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:35:56,092 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, 1, 1, 1, 1] [2020-10-24 02:35:56,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-24 02:35:56,092 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:35:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:35:56,093 INFO L82 PathProgramCache]: Analyzing trace with hash 50146726, now seen corresponding path program 42 times [2020-10-24 02:35:56,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:35:56,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561118836] [2020-10-24 02:35:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:35:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:08,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:36:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:36:08,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561118836] [2020-10-24 02:36:08,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:36:08,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-24 02:36:08,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006956058] [2020-10-24 02:36:08,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-24 02:36:08,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:36:08,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-24 02:36:08,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=7441, Unknown=0, NotChecked=0, Total=7656 [2020-10-24 02:36:08,422 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 88 states. [2020-10-24 02:36:59,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:36:59,844 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2020-10-24 02:36:59,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-10-24 02:36:59,847 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 230 [2020-10-24 02:36:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:36:59,849 INFO L225 Difference]: With dead ends: 245 [2020-10-24 02:36:59,849 INFO L226 Difference]: Without dead ends: 239 [2020-10-24 02:36:59,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8002 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=1142, Invalid=44868, Unknown=0, NotChecked=0, Total=46010 [2020-10-24 02:36:59,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-24 02:36:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 236. [2020-10-24 02:36:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-24 02:36:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2020-10-24 02:36:59,950 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 230 [2020-10-24 02:36:59,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:36:59,950 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2020-10-24 02:36:59,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-24 02:36:59,951 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2020-10-24 02:36:59,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-24 02:36:59,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:36:59,952 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, 1, 1, 1, 1] [2020-10-24 02:36:59,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-24 02:36:59,953 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:36:59,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:36:59,953 INFO L82 PathProgramCache]: Analyzing trace with hash 869545097, now seen corresponding path program 43 times [2020-10-24 02:36:59,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:36:59,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77728887] [2020-10-24 02:36:59,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:36:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:12,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:37:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:37:12,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77728887] [2020-10-24 02:37:12,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:37:12,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-10-24 02:37:12,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097158279] [2020-10-24 02:37:12,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-10-24 02:37:12,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:37:12,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-10-24 02:37:12,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=7790, Unknown=0, NotChecked=0, Total=8010 [2020-10-24 02:37:12,973 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 90 states.