/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:26:04,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:26:04,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:26:04,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 00:26:04,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:26:04,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:26:04,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:26:04,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:26:04,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:26:04,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:26:04,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:26:04,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:26:04,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:26:04,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:26:04,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:26:04,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:26:04,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:26:04,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:26:04,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:26:04,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:26:04,128 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:26:04,140 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:26:04,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:26:04,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:26:04,142 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:26:04,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:26:04,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:26:04,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:26:04,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:26:04,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:26:04,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:26:04,144 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:26:04,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:26:04,144 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:26:04,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:26:04,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:26:04,145 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:26:04,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:26:04,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:26:04,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:26:04,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:26:04,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:26:04,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:26:04,146 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:26:04,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:26:04,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:26:04,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:26:04,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:26:04,609 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:26:04,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-11-07 00:26:04,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76a1c32db/44a007d04f3649868ff6a378aebaeaff/FLAGd305b6e20 [2020-11-07 00:26:05,378 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:26:05,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-11-07 00:26:05,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76a1c32db/44a007d04f3649868ff6a378aebaeaff/FLAGd305b6e20 [2020-11-07 00:26:05,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76a1c32db/44a007d04f3649868ff6a378aebaeaff [2020-11-07 00:26:05,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:26:05,743 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:26:05,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:26:05,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:26:05,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:26:05,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:26:05" (1/1) ... [2020-11-07 00:26:05,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@318351a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:05, skipping insertion in model container [2020-11-07 00:26:05,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:26:05" (1/1) ... [2020-11-07 00:26:05,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:26:05,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:26:05,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:26:05,942 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:26:05,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:26:05,979 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:26:05,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:05 WrapperNode [2020-11-07 00:26:05,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:26:05,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:26:05,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:26:05,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:26:05,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:05" (1/1) ... [2020-11-07 00:26:05,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:05" (1/1) ... [2020-11-07 00:26:06,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:05" (1/1) ... [2020-11-07 00:26:06,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:05" (1/1) ... [2020-11-07 00:26:06,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:05" (1/1) ... [2020-11-07 00:26:06,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:05" (1/1) ... [2020-11-07 00:26:06,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:05" (1/1) ... [2020-11-07 00:26:06,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:26:06,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:26:06,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:26:06,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:26:06,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:26:06,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:26:06,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:26:06,102 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:26:06,102 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-11-07 00:26:06,102 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:26:06,102 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:26:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:26:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:26:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:26:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:26:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-11-07 00:26:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:26:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:26:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:26:06,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:26:06,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:26:06,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:26:06,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:26:06,562 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:26:06,563 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 00:26:06,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:26:06 BoogieIcfgContainer [2020-11-07 00:26:06,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:26:06,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:26:06,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:26:06,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:26:06,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:26:05" (1/3) ... [2020-11-07 00:26:06,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f190d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:26:06, skipping insertion in model container [2020-11-07 00:26:06,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:05" (2/3) ... [2020-11-07 00:26:06,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f190d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:26:06, skipping insertion in model container [2020-11-07 00:26:06,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:26:06" (3/3) ... [2020-11-07 00:26:06,580 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-11-07 00:26:06,598 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:26:06,601 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:26:06,616 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:26:06,653 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:26:06,653 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:26:06,654 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:26:06,654 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:26:06,654 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:26:06,654 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:26:06,655 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:26:06,655 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:26:06,677 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-11-07 00:26:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-07 00:26:06,694 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:06,695 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:06,696 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:06,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:06,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1781058716, now seen corresponding path program 1 times [2020-11-07 00:26:06,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:06,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434939617] [2020-11-07 00:26:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:06,808 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:07,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:07,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:07,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 00:26:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-07 00:26:07,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434939617] [2020-11-07 00:26:07,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:07,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:26:07,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841148573] [2020-11-07 00:26:07,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:26:07,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:07,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:26:07,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:26:07,318 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 9 states. [2020-11-07 00:26:08,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:08,720 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2020-11-07 00:26:08,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:26:08,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-11-07 00:26:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:08,734 INFO L225 Difference]: With dead ends: 87 [2020-11-07 00:26:08,735 INFO L226 Difference]: Without dead ends: 60 [2020-11-07 00:26:08,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:26:08,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-07 00:26:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2020-11-07 00:26:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-07 00:26:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-11-07 00:26:08,808 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 45 [2020-11-07 00:26:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:08,809 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-11-07 00:26:08,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:26:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-11-07 00:26:08,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-07 00:26:08,813 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:08,814 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:08,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:26:08,814 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:08,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:08,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1209040977, now seen corresponding path program 1 times [2020-11-07 00:26:08,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:08,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605706443] [2020-11-07 00:26:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:08,820 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:08,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:09,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:09,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 00:26:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:09,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:26:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:26:09,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605706443] [2020-11-07 00:26:09,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:09,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 00:26:09,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475063002] [2020-11-07 00:26:09,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 00:26:09,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:09,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 00:26:09,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:26:09,112 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 11 states. [2020-11-07 00:26:09,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:09,859 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2020-11-07 00:26:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 00:26:09,860 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-11-07 00:26:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:09,862 INFO L225 Difference]: With dead ends: 93 [2020-11-07 00:26:09,863 INFO L226 Difference]: Without dead ends: 65 [2020-11-07 00:26:09,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:26:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-07 00:26:09,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-11-07 00:26:09,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-07 00:26:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2020-11-07 00:26:09,890 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 54 [2020-11-07 00:26:09,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:09,891 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2020-11-07 00:26:09,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 00:26:09,891 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2020-11-07 00:26:09,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-07 00:26:09,894 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:09,894 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:09,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:26:09,894 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:09,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1581273073, now seen corresponding path program 1 times [2020-11-07 00:26:09,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:09,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965070751] [2020-11-07 00:26:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:09,899 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:09,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:09,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 00:26:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-07 00:26:10,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965070751] [2020-11-07 00:26:10,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:10,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:26:10,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569930248] [2020-11-07 00:26:10,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:26:10,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:10,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:26:10,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:26:10,029 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 6 states. [2020-11-07 00:26:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:10,377 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2020-11-07 00:26:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 00:26:10,378 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-11-07 00:26:10,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:10,380 INFO L225 Difference]: With dead ends: 71 [2020-11-07 00:26:10,380 INFO L226 Difference]: Without dead ends: 56 [2020-11-07 00:26:10,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:26:10,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-07 00:26:10,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-07 00:26:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 00:26:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-11-07 00:26:10,401 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 55 [2020-11-07 00:26:10,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:10,401 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-11-07 00:26:10,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:26:10,401 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-11-07 00:26:10,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-07 00:26:10,404 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:10,404 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:10,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:26:10,404 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:10,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:10,405 INFO L82 PathProgramCache]: Analyzing trace with hash -176089127, now seen corresponding path program 2 times [2020-11-07 00:26:10,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:10,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308256267] [2020-11-07 00:26:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:10,408 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 00:26:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-07 00:26:10,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308256267] [2020-11-07 00:26:10,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:10,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:26:10,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388936927] [2020-11-07 00:26:10,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:26:10,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:10,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:26:10,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:26:10,637 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 6 states. [2020-11-07 00:26:10,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:10,946 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2020-11-07 00:26:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 00:26:10,947 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-11-07 00:26:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:10,948 INFO L225 Difference]: With dead ends: 63 [2020-11-07 00:26:10,948 INFO L226 Difference]: Without dead ends: 56 [2020-11-07 00:26:10,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:26:10,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-07 00:26:10,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-07 00:26:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 00:26:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-11-07 00:26:10,983 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 55 [2020-11-07 00:26:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:10,986 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-11-07 00:26:10,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:26:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-11-07 00:26:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-07 00:26:10,993 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:10,994 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:10,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:26:10,994 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:10,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:10,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1906928364, now seen corresponding path program 1 times [2020-11-07 00:26:10,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:10,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643722856] [2020-11-07 00:26:10,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:11,004 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 00:26:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:26:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-11-07 00:26:11,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643722856] [2020-11-07 00:26:11,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:11,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:26:11,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586255628] [2020-11-07 00:26:11,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:26:11,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:11,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:26:11,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:26:11,211 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 7 states. [2020-11-07 00:26:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:11,575 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-11-07 00:26:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:26:11,575 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-11-07 00:26:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:11,577 INFO L225 Difference]: With dead ends: 86 [2020-11-07 00:26:11,577 INFO L226 Difference]: Without dead ends: 45 [2020-11-07 00:26:11,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:26:11,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-07 00:26:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-07 00:26:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-07 00:26:11,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-11-07 00:26:11,592 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 84 [2020-11-07 00:26:11,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:11,593 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-11-07 00:26:11,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:26:11,593 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-11-07 00:26:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-07 00:26:11,594 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:11,594 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:11,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:26:11,595 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:11,596 INFO L82 PathProgramCache]: Analyzing trace with hash -35502524, now seen corresponding path program 3 times [2020-11-07 00:26:11,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:11,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373854928] [2020-11-07 00:26:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:11,599 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:12,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 00:26:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:12,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-07 00:26:12,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373854928] [2020-11-07 00:26:12,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:12,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 00:26:12,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061734931] [2020-11-07 00:26:12,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 00:26:12,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:12,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 00:26:12,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:26:12,254 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2020-11-07 00:26:13,646 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:26:13,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:13,750 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-11-07 00:26:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 00:26:13,751 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-11-07 00:26:13,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:13,752 INFO L225 Difference]: With dead ends: 66 [2020-11-07 00:26:13,752 INFO L226 Difference]: Without dead ends: 59 [2020-11-07 00:26:13,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 00:26:13,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-07 00:26:13,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-11-07 00:26:13,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-07 00:26:13,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-11-07 00:26:13,781 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 65 [2020-11-07 00:26:13,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:13,781 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-11-07 00:26:13,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 00:26:13,781 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-11-07 00:26:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-07 00:26:13,783 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:13,784 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:13,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:26:13,784 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:13,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2084461945, now seen corresponding path program 4 times [2020-11-07 00:26:13,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:13,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276694489] [2020-11-07 00:26:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:13,789 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:14,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:14,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 00:26:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:14,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:14,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-07 00:26:14,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276694489] [2020-11-07 00:26:14,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:14,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-11-07 00:26:14,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343380553] [2020-11-07 00:26:14,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 00:26:14,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:14,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 00:26:14,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-11-07 00:26:14,397 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 21 states. [2020-11-07 00:26:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:16,175 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-11-07 00:26:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 00:26:16,176 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 75 [2020-11-07 00:26:16,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:16,177 INFO L225 Difference]: With dead ends: 71 [2020-11-07 00:26:16,177 INFO L226 Difference]: Without dead ends: 64 [2020-11-07 00:26:16,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 00:26:16,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-07 00:26:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-11-07 00:26:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-07 00:26:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-11-07 00:26:16,209 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 75 [2020-11-07 00:26:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:16,211 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-11-07 00:26:16,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 00:26:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-11-07 00:26:16,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 00:26:16,213 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:16,214 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:16,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 00:26:16,214 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:16,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:16,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1152977444, now seen corresponding path program 5 times [2020-11-07 00:26:16,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:16,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265574771] [2020-11-07 00:26:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:16,225 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:16,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:16,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:16,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:16,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 00:26:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:16,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:16,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:16,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-07 00:26:16,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265574771] [2020-11-07 00:26:16,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:16,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-11-07 00:26:16,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850504794] [2020-11-07 00:26:16,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 00:26:16,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:16,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 00:26:16,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-11-07 00:26:16,891 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 23 states. [2020-11-07 00:26:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:18,922 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2020-11-07 00:26:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 00:26:18,923 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-11-07 00:26:18,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:18,925 INFO L225 Difference]: With dead ends: 76 [2020-11-07 00:26:18,925 INFO L226 Difference]: Without dead ends: 69 [2020-11-07 00:26:18,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 00:26:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-07 00:26:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-11-07 00:26:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-07 00:26:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-11-07 00:26:18,943 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 85 [2020-11-07 00:26:18,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:18,944 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-11-07 00:26:18,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 00:26:18,944 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-11-07 00:26:18,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 00:26:18,945 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:18,945 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:18,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 00:26:18,946 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash 644328217, now seen corresponding path program 6 times [2020-11-07 00:26:18,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:18,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695698605] [2020-11-07 00:26:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:18,949 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:19,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:19,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:19,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:19,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 00:26:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:19,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:19,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:19,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:19,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-07 00:26:19,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695698605] [2020-11-07 00:26:19,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:19,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-11-07 00:26:19,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197107217] [2020-11-07 00:26:19,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 00:26:19,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:19,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 00:26:19,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:26:19,680 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 25 states. [2020-11-07 00:26:20,578 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-11-07 00:26:22,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:22,398 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-11-07 00:26:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 00:26:22,399 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-11-07 00:26:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:22,401 INFO L225 Difference]: With dead ends: 81 [2020-11-07 00:26:22,401 INFO L226 Difference]: Without dead ends: 74 [2020-11-07 00:26:22,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=328, Invalid=2024, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 00:26:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-07 00:26:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2020-11-07 00:26:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-07 00:26:22,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2020-11-07 00:26:22,421 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 95 [2020-11-07 00:26:22,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:22,422 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2020-11-07 00:26:22,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 00:26:22,422 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2020-11-07 00:26:22,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 00:26:22,423 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:22,424 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:22,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 00:26:22,424 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1926544540, now seen corresponding path program 7 times [2020-11-07 00:26:22,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:22,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227752388] [2020-11-07 00:26:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:22,427 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:22,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:22,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:22,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:22,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:22,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 00:26:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:22,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:22,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-11-07 00:26:22,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227752388] [2020-11-07 00:26:22,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:22,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 00:26:22,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449305087] [2020-11-07 00:26:22,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 00:26:22,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:22,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 00:26:22,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:26:22,906 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand 18 states. [2020-11-07 00:26:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:24,503 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2020-11-07 00:26:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 00:26:24,503 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-11-07 00:26:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:24,505 INFO L225 Difference]: With dead ends: 85 [2020-11-07 00:26:24,505 INFO L226 Difference]: Without dead ends: 78 [2020-11-07 00:26:24,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 00:26:24,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-07 00:26:24,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-11-07 00:26:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-07 00:26:24,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2020-11-07 00:26:24,528 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 85 [2020-11-07 00:26:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:24,528 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2020-11-07 00:26:24,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 00:26:24,529 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2020-11-07 00:26:24,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 00:26:24,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:24,530 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:24,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 00:26:24,531 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:24,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:24,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1618724431, now seen corresponding path program 8 times [2020-11-07 00:26:24,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:24,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432756200] [2020-11-07 00:26:24,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:24,534 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:24,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:24,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:24,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:24,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:24,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 00:26:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:25,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:25,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:25,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-11-07 00:26:25,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432756200] [2020-11-07 00:26:25,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:25,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-11-07 00:26:25,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044937423] [2020-11-07 00:26:25,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 00:26:25,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:25,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 00:26:25,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:26:25,248 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 25 states. [2020-11-07 00:26:26,689 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:26:27,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:27,867 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-11-07 00:26:27,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 00:26:27,868 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-11-07 00:26:27,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:27,870 INFO L225 Difference]: With dead ends: 85 [2020-11-07 00:26:27,870 INFO L226 Difference]: Without dead ends: 78 [2020-11-07 00:26:27,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 00:26:27,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-07 00:26:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-11-07 00:26:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-07 00:26:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2020-11-07 00:26:27,890 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 95 [2020-11-07 00:26:27,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:27,890 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2020-11-07 00:26:27,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 00:26:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2020-11-07 00:26:27,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-07 00:26:27,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:27,892 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:27,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 00:26:27,892 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:27,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:27,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1494124015, now seen corresponding path program 9 times [2020-11-07 00:26:27,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:27,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927602806] [2020-11-07 00:26:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:27,895 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 00:26:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-07 00:26:28,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927602806] [2020-11-07 00:26:28,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:28,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-11-07 00:26:28,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295442093] [2020-11-07 00:26:28,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 00:26:28,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:28,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 00:26:28,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-11-07 00:26:28,461 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 21 states. [2020-11-07 00:26:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:30,173 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-11-07 00:26:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 00:26:30,174 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 75 [2020-11-07 00:26:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:30,176 INFO L225 Difference]: With dead ends: 85 [2020-11-07 00:26:30,176 INFO L226 Difference]: Without dead ends: 78 [2020-11-07 00:26:30,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 00:26:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-07 00:26:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-11-07 00:26:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-07 00:26:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2020-11-07 00:26:30,195 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 75 [2020-11-07 00:26:30,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:30,195 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2020-11-07 00:26:30,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 00:26:30,196 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2020-11-07 00:26:30,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-07 00:26:30,197 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:30,197 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:30,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 00:26:30,198 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:30,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:30,198 INFO L82 PathProgramCache]: Analyzing trace with hash -312906364, now seen corresponding path program 10 times [2020-11-07 00:26:30,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:30,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155934612] [2020-11-07 00:26:30,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:30,201 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:30,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:30,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:30,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:30,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:30,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 00:26:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:30,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:30,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:30,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:30,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-11-07 00:26:31,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155934612] [2020-11-07 00:26:31,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:31,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-11-07 00:26:31,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030725130] [2020-11-07 00:26:31,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 00:26:31,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:31,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 00:26:31,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-11-07 00:26:31,060 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 27 states. [2020-11-07 00:26:31,988 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:26:32,507 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-11-07 00:26:34,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:34,043 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-11-07 00:26:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 00:26:34,044 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2020-11-07 00:26:34,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:34,045 INFO L225 Difference]: With dead ends: 85 [2020-11-07 00:26:34,046 INFO L226 Difference]: Without dead ends: 78 [2020-11-07 00:26:34,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=337, Invalid=2213, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 00:26:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-07 00:26:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2020-11-07 00:26:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-07 00:26:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2020-11-07 00:26:34,067 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 105 [2020-11-07 00:26:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:34,068 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2020-11-07 00:26:34,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 00:26:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2020-11-07 00:26:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-07 00:26:34,069 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:34,069 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:34,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 00:26:34,070 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:34,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:34,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1209072124, now seen corresponding path program 11 times [2020-11-07 00:26:34,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:34,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574906338] [2020-11-07 00:26:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:34,072 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:34,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:34,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:34,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:34,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 00:26:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:34,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:34,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:34,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:34,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:34,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-11-07 00:26:35,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574906338] [2020-11-07 00:26:35,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:35,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-11-07 00:26:35,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651076836] [2020-11-07 00:26:35,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 00:26:35,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:35,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 00:26:35,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-11-07 00:26:35,083 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand 27 states. [2020-11-07 00:26:35,934 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-11-07 00:26:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:38,149 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-11-07 00:26:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 00:26:38,150 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2020-11-07 00:26:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:38,152 INFO L225 Difference]: With dead ends: 90 [2020-11-07 00:26:38,152 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 00:26:38,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=375, Invalid=2487, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 00:26:38,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 00:26:38,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-11-07 00:26:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 00:26:38,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2020-11-07 00:26:38,171 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 105 [2020-11-07 00:26:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:38,172 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2020-11-07 00:26:38,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 00:26:38,172 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2020-11-07 00:26:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 00:26:38,178 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:38,178 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:38,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 00:26:38,179 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:38,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:38,180 INFO L82 PathProgramCache]: Analyzing trace with hash -793968977, now seen corresponding path program 12 times [2020-11-07 00:26:38,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:38,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842331803] [2020-11-07 00:26:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:38,182 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:38,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:38,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:38,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:38,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:38,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 00:26:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:38,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:38,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:38,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:38,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:39,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 29 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-11-07 00:26:39,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842331803] [2020-11-07 00:26:39,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:39,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-11-07 00:26:39,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539734299] [2020-11-07 00:26:39,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 00:26:39,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:39,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 00:26:39,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-11-07 00:26:39,129 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 29 states. [2020-11-07 00:26:40,095 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:26:42,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:42,563 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-11-07 00:26:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 00:26:42,564 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 00:26:42,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:42,566 INFO L225 Difference]: With dead ends: 90 [2020-11-07 00:26:42,566 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 00:26:42,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=384, Invalid=2696, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 00:26:42,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 00:26:42,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2020-11-07 00:26:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-07 00:26:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-11-07 00:26:42,587 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 115 [2020-11-07 00:26:42,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:42,588 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-11-07 00:26:42,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 00:26:42,588 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-11-07 00:26:42,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 00:26:42,589 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:42,589 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:42,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 00:26:42,589 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:42,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:42,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1149586151, now seen corresponding path program 13 times [2020-11-07 00:26:42,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:42,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581525351] [2020-11-07 00:26:42,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:42,592 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:42,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:42,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:42,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:42,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:43,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:43,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 00:26:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:43,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:43,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-11-07 00:26:43,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581525351] [2020-11-07 00:26:43,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:43,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-11-07 00:26:43,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924714094] [2020-11-07 00:26:43,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 00:26:43,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:43,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 00:26:43,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:26:43,390 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 25 states. [2020-11-07 00:26:44,249 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:26:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:45,930 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2020-11-07 00:26:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 00:26:45,931 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-11-07 00:26:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:45,932 INFO L225 Difference]: With dead ends: 90 [2020-11-07 00:26:45,932 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 00:26:45,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 00:26:45,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 00:26:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-11-07 00:26:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 00:26:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-11-07 00:26:45,955 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 95 [2020-11-07 00:26:45,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:45,955 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-11-07 00:26:45,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 00:26:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-11-07 00:26:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 00:26:45,957 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:45,957 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:45,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 00:26:45,957 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:45,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:45,958 INFO L82 PathProgramCache]: Analyzing trace with hash 144287204, now seen corresponding path program 14 times [2020-11-07 00:26:45,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:45,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286037046] [2020-11-07 00:26:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:45,960 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 00:26:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-07 00:26:46,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286037046] [2020-11-07 00:26:46,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:46,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-11-07 00:26:46,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860714649] [2020-11-07 00:26:46,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 00:26:46,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:46,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 00:26:46,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-11-07 00:26:46,591 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 23 states. [2020-11-07 00:26:48,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:48,800 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-11-07 00:26:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 00:26:48,800 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-11-07 00:26:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:48,802 INFO L225 Difference]: With dead ends: 90 [2020-11-07 00:26:48,802 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 00:26:48,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 00:26:48,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 00:26:48,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-11-07 00:26:48,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 00:26:48,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2020-11-07 00:26:48,821 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 85 [2020-11-07 00:26:48,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:48,822 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2020-11-07 00:26:48,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 00:26:48,822 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2020-11-07 00:26:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 00:26:48,823 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:48,823 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:48,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 00:26:48,824 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:48,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:48,824 INFO L82 PathProgramCache]: Analyzing trace with hash -743029340, now seen corresponding path program 15 times [2020-11-07 00:26:48,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:48,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746545448] [2020-11-07 00:26:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:48,826 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:48,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:48,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:49,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:49,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:49,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:49,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 00:26:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:49,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:49,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:49,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:49,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:49,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 33 proven. 56 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-11-07 00:26:49,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746545448] [2020-11-07 00:26:49,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:49,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-11-07 00:26:49,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732482284] [2020-11-07 00:26:49,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 00:26:49,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:49,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 00:26:49,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-11-07 00:26:49,926 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand 31 states. [2020-11-07 00:26:52,048 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:26:53,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:53,897 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-11-07 00:26:53,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 00:26:53,898 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-11-07 00:26:53,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:53,900 INFO L225 Difference]: With dead ends: 90 [2020-11-07 00:26:53,901 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 00:26:53,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=393, Invalid=2913, Unknown=0, NotChecked=0, Total=3306 [2020-11-07 00:26:53,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 00:26:53,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-11-07 00:26:53,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 00:26:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-11-07 00:26:53,923 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 125 [2020-11-07 00:26:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:53,924 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-11-07 00:26:53,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 00:26:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-11-07 00:26:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 00:26:53,925 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:53,925 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:53,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 00:26:53,926 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:53,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1252782777, now seen corresponding path program 16 times [2020-11-07 00:26:53,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:53,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940956998] [2020-11-07 00:26:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:53,928 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:54,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:54,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:54,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:54,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:54,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:54,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 00:26:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:54,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:54,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:54,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:54,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 28 proven. 51 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-11-07 00:26:54,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940956998] [2020-11-07 00:26:54,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:54,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-11-07 00:26:54,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407401404] [2020-11-07 00:26:54,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 00:26:54,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:54,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 00:26:54,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-11-07 00:26:54,932 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 29 states. [2020-11-07 00:26:56,051 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:26:56,649 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:26:56,835 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:26:57,256 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:26:58,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:58,764 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-11-07 00:26:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 00:26:58,771 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 00:26:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:58,772 INFO L225 Difference]: With dead ends: 90 [2020-11-07 00:26:58,772 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 00:26:58,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 00:26:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 00:26:58,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-11-07 00:26:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 00:26:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2020-11-07 00:26:58,796 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 115 [2020-11-07 00:26:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:58,796 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2020-11-07 00:26:58,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 00:26:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2020-11-07 00:26:58,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-07 00:26:58,798 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:58,798 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:58,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 00:26:58,798 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:58,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:58,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1889819076, now seen corresponding path program 17 times [2020-11-07 00:26:58,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:58,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638050960] [2020-11-07 00:26:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:58,801 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:58,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:58,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:59,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:59,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:59,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:59,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 00:26:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:59,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:59,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:59,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:26:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-11-07 00:26:59,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638050960] [2020-11-07 00:26:59,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:59,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 00:26:59,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029958389] [2020-11-07 00:26:59,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 00:26:59,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:59,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 00:26:59,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:26:59,444 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 20 states. [2020-11-07 00:27:01,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:01,622 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-11-07 00:27:01,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 00:27:01,623 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2020-11-07 00:27:01,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:01,625 INFO L225 Difference]: With dead ends: 90 [2020-11-07 00:27:01,625 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 00:27:01,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 00:27:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 00:27:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2020-11-07 00:27:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-07 00:27:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-11-07 00:27:01,647 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 105 [2020-11-07 00:27:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:01,647 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-11-07 00:27:01,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 00:27:01,647 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-11-07 00:27:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 00:27:01,648 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:01,648 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:01,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 00:27:01,649 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:01,649 INFO L82 PathProgramCache]: Analyzing trace with hash -106233671, now seen corresponding path program 18 times [2020-11-07 00:27:01,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:01,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73775486] [2020-11-07 00:27:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:01,651 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:01,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:01,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:27:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:01,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:01,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 00:27:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:02,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:02,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:02,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:02,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:02,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:02,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-11-07 00:27:02,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73775486] [2020-11-07 00:27:02,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:02,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-11-07 00:27:02,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205251493] [2020-11-07 00:27:02,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 00:27:02,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:02,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 00:27:02,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-11-07 00:27:02,729 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 29 states. [2020-11-07 00:27:03,735 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 00:27:06,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:06,660 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-11-07 00:27:06,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 00:27:06,661 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 00:27:06,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:06,663 INFO L225 Difference]: With dead ends: 95 [2020-11-07 00:27:06,664 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 00:27:06,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=422, Invalid=3000, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 00:27:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 00:27:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-11-07 00:27:06,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 00:27:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-11-07 00:27:06,689 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 115 [2020-11-07 00:27:06,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:06,689 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-11-07 00:27:06,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 00:27:06,690 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-11-07 00:27:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 00:27:06,691 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:06,691 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:06,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 00:27:06,691 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:06,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:06,692 INFO L82 PathProgramCache]: Analyzing trace with hash 202792868, now seen corresponding path program 19 times [2020-11-07 00:27:06,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:06,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688384927] [2020-11-07 00:27:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:06,694 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:06,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:06,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:27:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:06,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 00:27:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-11-07 00:27:07,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688384927] [2020-11-07 00:27:07,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:07,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-11-07 00:27:07,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038085882] [2020-11-07 00:27:07,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 00:27:07,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:07,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 00:27:07,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-11-07 00:27:07,893 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 31 states. [2020-11-07 00:27:09,030 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:27:09,607 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:27:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:12,353 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2020-11-07 00:27:12,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 00:27:12,357 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-11-07 00:27:12,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:12,358 INFO L225 Difference]: With dead ends: 99 [2020-11-07 00:27:12,358 INFO L226 Difference]: Without dead ends: 92 [2020-11-07 00:27:12,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=431, Invalid=3229, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 00:27:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-07 00:27:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2020-11-07 00:27:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 00:27:12,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-11-07 00:27:12,392 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 125 [2020-11-07 00:27:12,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:12,393 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-11-07 00:27:12,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 00:27:12,393 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-11-07 00:27:12,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 00:27:12,394 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:12,394 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:12,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 00:27:12,394 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:12,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:12,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1616955303, now seen corresponding path program 20 times [2020-11-07 00:27:12,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:12,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138417321] [2020-11-07 00:27:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:12,397 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:12,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:12,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:27:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:12,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:12,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:12,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:12,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 00:27:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:13,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:13,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:13,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:13,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:13,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:13,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 61 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-11-07 00:27:13,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138417321] [2020-11-07 00:27:13,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:13,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-11-07 00:27:13,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404435267] [2020-11-07 00:27:13,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 00:27:13,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:13,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 00:27:13,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 00:27:13,854 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 33 states. [2020-11-07 00:27:15,055 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:27:15,719 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:27:15,914 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:27:16,380 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:27:16,551 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:27:19,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:19,027 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2020-11-07 00:27:19,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 00:27:19,028 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-11-07 00:27:19,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:19,030 INFO L225 Difference]: With dead ends: 95 [2020-11-07 00:27:19,030 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 00:27:19,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 00:27:19,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 00:27:19,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2020-11-07 00:27:19,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-07 00:27:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2020-11-07 00:27:19,054 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 135 [2020-11-07 00:27:19,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:19,054 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2020-11-07 00:27:19,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 00:27:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2020-11-07 00:27:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 00:27:19,055 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:19,055 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:19,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 00:27:19,055 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:19,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash 355439567, now seen corresponding path program 21 times [2020-11-07 00:27:19,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:19,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485134215] [2020-11-07 00:27:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:19,057 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:27:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 00:27:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-07 00:27:19,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485134215] [2020-11-07 00:27:19,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:19,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-11-07 00:27:19,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936610205] [2020-11-07 00:27:19,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 00:27:19,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:19,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 00:27:19,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:27:19,880 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 25 states. [2020-11-07 00:27:20,884 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-11-07 00:27:23,088 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-11-07 00:27:23,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:23,170 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2020-11-07 00:27:23,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 00:27:23,170 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-11-07 00:27:23,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:23,171 INFO L225 Difference]: With dead ends: 95 [2020-11-07 00:27:23,172 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 00:27:23,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=328, Invalid=2024, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 00:27:23,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 00:27:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-11-07 00:27:23,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 00:27:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2020-11-07 00:27:23,198 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 95 [2020-11-07 00:27:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:23,198 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2020-11-07 00:27:23,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 00:27:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2020-11-07 00:27:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 00:27:23,199 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:23,199 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:23,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 00:27:23,200 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:23,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1751846044, now seen corresponding path program 22 times [2020-11-07 00:27:23,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:23,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008444019] [2020-11-07 00:27:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:23,202 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:23,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:23,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:27:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:23,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:23,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:23,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:23,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:23,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 00:27:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:23,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:23,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:23,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:23,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-11-07 00:27:24,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008444019] [2020-11-07 00:27:24,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:24,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 00:27:24,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954814749] [2020-11-07 00:27:24,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 00:27:24,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:24,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 00:27:24,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:27:24,017 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand 22 states. [2020-11-07 00:27:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:26,683 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2020-11-07 00:27:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 00:27:26,684 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 125 [2020-11-07 00:27:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:26,686 INFO L225 Difference]: With dead ends: 95 [2020-11-07 00:27:26,686 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 00:27:26,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=314, Invalid=1756, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 00:27:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 00:27:26,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-11-07 00:27:26,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 00:27:26,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2020-11-07 00:27:26,707 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 125 [2020-11-07 00:27:26,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:26,707 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2020-11-07 00:27:26,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 00:27:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2020-11-07 00:27:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-07 00:27:26,708 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:26,709 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:26,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 00:27:26,709 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:26,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:26,709 INFO L82 PathProgramCache]: Analyzing trace with hash 960264516, now seen corresponding path program 23 times [2020-11-07 00:27:26,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:26,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885632819] [2020-11-07 00:27:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:26,712 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:26,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:26,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:27:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:26,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:26,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:27,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:27,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:27,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 00:27:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:27,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:27,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-11-07 00:27:27,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885632819] [2020-11-07 00:27:27,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:27,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-11-07 00:27:27,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75015198] [2020-11-07 00:27:27,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 00:27:27,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:27,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 00:27:27,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-11-07 00:27:27,639 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand 27 states. [2020-11-07 00:27:28,610 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:27:28,933 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 00:27:29,166 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-11-07 00:27:29,337 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:27:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:31,026 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2020-11-07 00:27:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 00:27:31,027 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2020-11-07 00:27:31,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:31,027 INFO L225 Difference]: With dead ends: 95 [2020-11-07 00:27:31,028 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 00:27:31,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=337, Invalid=2213, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 00:27:31,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 00:27:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-11-07 00:27:31,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 00:27:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2020-11-07 00:27:31,054 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 105 [2020-11-07 00:27:31,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:31,054 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2020-11-07 00:27:31,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 00:27:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2020-11-07 00:27:31,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 00:27:31,056 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:31,056 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:31,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 00:27:31,056 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:31,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:31,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1939135441, now seen corresponding path program 24 times [2020-11-07 00:27:31,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:31,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340840362] [2020-11-07 00:27:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:31,059 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:31,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:31,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:27:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:31,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:31,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:31,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:31,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:31,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 00:27:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:31,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:31,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:32,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 25 proven. 54 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-11-07 00:27:32,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340840362] [2020-11-07 00:27:32,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:32,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-11-07 00:27:32,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074341654] [2020-11-07 00:27:32,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 00:27:32,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:32,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 00:27:32,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-11-07 00:27:32,174 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand 29 states. [2020-11-07 00:27:33,251 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:27:33,409 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:27:33,847 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:27:34,031 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:27:34,266 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:27:34,465 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:27:34,627 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:27:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:35,899 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2020-11-07 00:27:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 00:27:35,901 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 00:27:35,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:35,902 INFO L225 Difference]: With dead ends: 95 [2020-11-07 00:27:35,902 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 00:27:35,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 00:27:35,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 00:27:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-11-07 00:27:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 00:27:35,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-11-07 00:27:35,928 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 115 [2020-11-07 00:27:35,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:35,928 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-11-07 00:27:35,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 00:27:35,929 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-11-07 00:27:35,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 00:27:35,930 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:35,930 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:35,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 00:27:35,930 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:35,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:35,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1176677519, now seen corresponding path program 25 times [2020-11-07 00:27:35,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:35,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265536416] [2020-11-07 00:27:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:35,932 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:36,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:36,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:27:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:36,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:36,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:36,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:36,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:36,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 00:27:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:36,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:36,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:37,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:37,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:37,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:37,378 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 37 proven. 67 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-11-07 00:27:37,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265536416] [2020-11-07 00:27:37,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:37,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-11-07 00:27:37,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946537199] [2020-11-07 00:27:37,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 00:27:37,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:37,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 00:27:37,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 00:27:37,380 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 33 states. [2020-11-07 00:27:38,604 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:27:38,976 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:27:39,237 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:27:39,432 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:27:39,668 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:27:39,918 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:27:40,096 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:27:40,322 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:27:40,565 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:27:40,733 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:27:42,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:42,127 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-11-07 00:27:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 00:27:42,127 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-11-07 00:27:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:42,128 INFO L225 Difference]: With dead ends: 95 [2020-11-07 00:27:42,128 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 00:27:42,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=402, Invalid=3138, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 00:27:42,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 00:27:42,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-11-07 00:27:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 00:27:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-11-07 00:27:42,155 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 135 [2020-11-07 00:27:42,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:42,155 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-11-07 00:27:42,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 00:27:42,156 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-11-07 00:27:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 00:27:42,157 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:42,157 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:42,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 00:27:42,157 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:42,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:42,157 INFO L82 PathProgramCache]: Analyzing trace with hash -936102524, now seen corresponding path program 26 times [2020-11-07 00:27:42,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:42,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154120163] [2020-11-07 00:27:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:42,160 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:42,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:42,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:27:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:42,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:42,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:42,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:42,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:42,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 00:27:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:42,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:43,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:43,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:43,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:43,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:43,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 42 proven. 72 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-07 00:27:43,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154120163] [2020-11-07 00:27:43,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:43,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-11-07 00:27:43,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712629394] [2020-11-07 00:27:43,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 00:27:43,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:43,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 00:27:43,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 00:27:43,799 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 35 states. [2020-11-07 00:27:45,087 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:27:45,259 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:27:45,772 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:27:45,966 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:27:46,230 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:27:46,443 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:27:46,616 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:27:46,856 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:27:47,089 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:27:47,263 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:27:49,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:49,200 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2020-11-07 00:27:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 00:27:49,201 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-11-07 00:27:49,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:49,202 INFO L225 Difference]: With dead ends: 95 [2020-11-07 00:27:49,202 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 00:27:49,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=449, Invalid=3711, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 00:27:49,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 00:27:49,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2020-11-07 00:27:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-07 00:27:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2020-11-07 00:27:49,222 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 145 [2020-11-07 00:27:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:49,223 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2020-11-07 00:27:49,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 00:27:49,223 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2020-11-07 00:27:49,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 00:27:49,224 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:49,224 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:49,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 00:27:49,224 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:49,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:49,225 INFO L82 PathProgramCache]: Analyzing trace with hash -319407644, now seen corresponding path program 27 times [2020-11-07 00:27:49,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:49,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041034273] [2020-11-07 00:27:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:49,227 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:49,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:49,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:27:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:49,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:49,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 00:27:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:49,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:49,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:49,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:49,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:50,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:50,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:50,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 37 proven. 32 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-11-07 00:27:50,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041034273] [2020-11-07 00:27:50,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:50,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-11-07 00:27:50,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768942250] [2020-11-07 00:27:50,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 00:27:50,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:50,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 00:27:50,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-11-07 00:27:50,533 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 31 states. [2020-11-07 00:27:51,663 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 00:27:55,220 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 00:27:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:55,382 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2020-11-07 00:27:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 00:27:55,383 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-11-07 00:27:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:55,385 INFO L225 Difference]: With dead ends: 100 [2020-11-07 00:27:55,385 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 00:27:55,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=469, Invalid=3563, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 00:27:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 00:27:55,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-11-07 00:27:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 00:27:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-11-07 00:27:55,420 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 125 [2020-11-07 00:27:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:55,420 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-11-07 00:27:55,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 00:27:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-11-07 00:27:55,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 00:27:55,422 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:55,422 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:27:55,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 00:27:55,422 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:55,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:55,423 INFO L82 PathProgramCache]: Analyzing trace with hash -583782641, now seen corresponding path program 28 times [2020-11-07 00:27:55,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:55,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004447894] [2020-11-07 00:27:55,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:55,425 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:55,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:55,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:27:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:55,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:55,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:55,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 00:27:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:55,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:56,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:56,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:56,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:56,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:56,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:56,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:27:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 39 proven. 55 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-11-07 00:27:56,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004447894] [2020-11-07 00:27:56,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:56,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-11-07 00:27:56,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264018761] [2020-11-07 00:27:56,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 00:27:56,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:56,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 00:27:56,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 00:27:56,829 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 33 states. [2020-11-07 00:27:57,879 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:27:58,099 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:27:58,281 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:27:58,526 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:27:58,795 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:27:58,995 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:28:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:02,491 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-11-07 00:28:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 00:28:02,492 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-11-07 00:28:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:02,494 INFO L225 Difference]: With dead ends: 104 [2020-11-07 00:28:02,494 INFO L226 Difference]: Without dead ends: 97 [2020-11-07 00:28:02,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=478, Invalid=3812, Unknown=0, NotChecked=0, Total=4290 [2020-11-07 00:28:02,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-07 00:28:02,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2020-11-07 00:28:02,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 00:28:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-11-07 00:28:02,527 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 135 [2020-11-07 00:28:02,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:02,527 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-11-07 00:28:02,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 00:28:02,527 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-11-07 00:28:02,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 00:28:02,528 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:02,529 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:02,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 00:28:02,529 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:02,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:02,529 INFO L82 PathProgramCache]: Analyzing trace with hash -482252412, now seen corresponding path program 29 times [2020-11-07 00:28:02,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:02,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765927758] [2020-11-07 00:28:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:02,531 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:02,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:02,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:28:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:02,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:02,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:03,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:03,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 00:28:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:03,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:03,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:03,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:03,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:03,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:03,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:04,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 43 proven. 66 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-07 00:28:04,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765927758] [2020-11-07 00:28:04,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:04,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-11-07 00:28:04,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476872776] [2020-11-07 00:28:04,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 00:28:04,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:04,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 00:28:04,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 00:28:04,227 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 35 states. [2020-11-07 00:28:05,595 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:28:05,775 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:28:06,037 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:28:06,326 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:28:06,543 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:06,830 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:07,061 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:28:07,243 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:28:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:10,406 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-11-07 00:28:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 00:28:10,408 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-11-07 00:28:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:10,410 INFO L225 Difference]: With dead ends: 104 [2020-11-07 00:28:10,410 INFO L226 Difference]: Without dead ends: 97 [2020-11-07 00:28:10,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=487, Invalid=4069, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 00:28:10,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-07 00:28:10,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2020-11-07 00:28:10,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 00:28:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-11-07 00:28:10,444 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 145 [2020-11-07 00:28:10,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:10,444 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-11-07 00:28:10,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 00:28:10,444 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-11-07 00:28:10,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 00:28:10,445 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:10,446 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:10,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 00:28:10,446 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:10,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:10,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1776823535, now seen corresponding path program 30 times [2020-11-07 00:28:10,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:10,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400192037] [2020-11-07 00:28:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:10,448 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:10,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:10,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:28:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:10,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:10,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:10,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:11,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:11,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 00:28:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:11,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:11,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:11,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:11,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:11,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:12,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:12,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 47 proven. 77 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-11-07 00:28:12,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400192037] [2020-11-07 00:28:12,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:12,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-11-07 00:28:12,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610740456] [2020-11-07 00:28:12,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 00:28:12,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:12,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 00:28:12,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 00:28:12,424 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 37 states. [2020-11-07 00:28:13,560 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:28:13,781 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:28:14,208 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:28:14,478 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:28:14,680 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:14,945 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:15,179 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:28:15,368 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:15,622 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:15,871 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:28:16,066 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:28:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:18,612 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2020-11-07 00:28:18,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 00:28:18,613 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-11-07 00:28:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:18,615 INFO L225 Difference]: With dead ends: 100 [2020-11-07 00:28:18,615 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 00:28:18,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=496, Invalid=4334, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 00:28:18,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 00:28:18,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-11-07 00:28:18,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 00:28:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2020-11-07 00:28:18,639 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 155 [2020-11-07 00:28:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:18,639 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2020-11-07 00:28:18,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 00:28:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2020-11-07 00:28:18,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-07 00:28:18,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:18,640 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:18,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 00:28:18,641 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:18,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1518465660, now seen corresponding path program 31 times [2020-11-07 00:28:18,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:18,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222283825] [2020-11-07 00:28:18,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:18,643 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:18,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:18,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:28:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:18,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:18,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:19,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:19,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:19,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:19,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:28:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:19,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-11-07 00:28:19,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222283825] [2020-11-07 00:28:19,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:19,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-11-07 00:28:19,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043744796] [2020-11-07 00:28:19,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 00:28:19,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:19,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 00:28:19,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-11-07 00:28:19,657 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 27 states. [2020-11-07 00:28:20,723 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-11-07 00:28:20,883 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-07 00:28:23,331 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-11-07 00:28:23,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:23,517 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2020-11-07 00:28:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 00:28:23,519 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2020-11-07 00:28:23,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:23,521 INFO L225 Difference]: With dead ends: 100 [2020-11-07 00:28:23,521 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 00:28:23,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=375, Invalid=2487, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 00:28:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 00:28:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-11-07 00:28:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 00:28:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2020-11-07 00:28:23,546 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 105 [2020-11-07 00:28:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:23,547 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2020-11-07 00:28:23,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 00:28:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2020-11-07 00:28:23,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 00:28:23,548 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:23,548 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:23,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 00:28:23,549 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:23,549 INFO L82 PathProgramCache]: Analyzing trace with hash 501789028, now seen corresponding path program 32 times [2020-11-07 00:28:23,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:23,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612267347] [2020-11-07 00:28:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:23,551 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:23,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:23,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:28:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:23,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:23,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:23,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:24,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:24,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:24,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:28:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:24,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:24,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:24,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 29 proven. 60 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-11-07 00:28:24,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612267347] [2020-11-07 00:28:24,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:24,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-11-07 00:28:24,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366780476] [2020-11-07 00:28:24,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 00:28:24,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:24,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 00:28:24,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-11-07 00:28:24,956 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand 31 states. [2020-11-07 00:28:25,938 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:28:26,140 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:28:26,315 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:28:26,515 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:28:26,786 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:28:26,984 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:27,246 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:27,475 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:28:27,646 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:28:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:29,588 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2020-11-07 00:28:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 00:28:29,589 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-11-07 00:28:29,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:29,591 INFO L225 Difference]: With dead ends: 100 [2020-11-07 00:28:29,591 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 00:28:29,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=393, Invalid=2913, Unknown=0, NotChecked=0, Total=3306 [2020-11-07 00:28:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 00:28:29,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-11-07 00:28:29,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 00:28:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 111 transitions. [2020-11-07 00:28:29,623 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 111 transitions. Word has length 125 [2020-11-07 00:28:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:29,623 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 111 transitions. [2020-11-07 00:28:29,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 00:28:29,623 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 111 transitions. [2020-11-07 00:28:29,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 00:28:29,624 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:29,624 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:29,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 00:28:29,625 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:29,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:29,625 INFO L82 PathProgramCache]: Analyzing trace with hash -90226087, now seen corresponding path program 33 times [2020-11-07 00:28:29,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:29,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223659942] [2020-11-07 00:28:29,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:29,627 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:29,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:29,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:28:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:29,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:29,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:30,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:30,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:30,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:30,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:28:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:30,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:30,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:30,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:31,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 34 proven. 70 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-11-07 00:28:31,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223659942] [2020-11-07 00:28:31,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:31,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-11-07 00:28:31,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473766180] [2020-11-07 00:28:31,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 00:28:31,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:31,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 00:28:31,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 00:28:31,160 INFO L87 Difference]: Start difference. First operand 88 states and 111 transitions. Second operand 33 states. [2020-11-07 00:28:32,210 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:28:32,426 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:28:32,595 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:28:32,806 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:28:33,062 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:28:33,263 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:33,505 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:33,741 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:28:33,914 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:34,130 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:34,376 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:28:34,560 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:28:35,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:35,950 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2020-11-07 00:28:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 00:28:35,952 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-11-07 00:28:35,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:35,953 INFO L225 Difference]: With dead ends: 100 [2020-11-07 00:28:35,953 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 00:28:35,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=402, Invalid=3138, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 00:28:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 00:28:35,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-11-07 00:28:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 00:28:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2020-11-07 00:28:35,979 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 135 [2020-11-07 00:28:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:35,979 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2020-11-07 00:28:35,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 00:28:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2020-11-07 00:28:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 00:28:35,981 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:35,981 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:35,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 00:28:35,981 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:35,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1640360775, now seen corresponding path program 34 times [2020-11-07 00:28:35,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:35,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850026410] [2020-11-07 00:28:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:35,984 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:28:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:28:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:36,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:37,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-11-07 00:28:37,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850026410] [2020-11-07 00:28:37,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:37,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-11-07 00:28:37,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139460973] [2020-11-07 00:28:37,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 00:28:37,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:37,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 00:28:37,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-11-07 00:28:37,162 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand 29 states. [2020-11-07 00:28:38,138 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:28:38,341 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:28:38,509 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:28:38,709 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:28:38,964 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:28:39,151 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:28:41,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:41,465 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2020-11-07 00:28:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 00:28:41,466 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 00:28:41,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:41,468 INFO L225 Difference]: With dead ends: 100 [2020-11-07 00:28:41,468 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 00:28:41,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=384, Invalid=2696, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 00:28:41,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 00:28:41,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-11-07 00:28:41,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 00:28:41,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-11-07 00:28:41,503 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 115 [2020-11-07 00:28:41,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:41,503 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-11-07 00:28:41,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 00:28:41,503 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-11-07 00:28:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 00:28:41,504 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:41,505 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:41,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 00:28:41,505 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:41,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:41,505 INFO L82 PathProgramCache]: Analyzing trace with hash 302157124, now seen corresponding path program 35 times [2020-11-07 00:28:41,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:41,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834690232] [2020-11-07 00:28:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:41,507 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:41,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:41,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:28:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:41,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:41,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:41,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:42,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:42,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:42,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:28:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:42,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:42,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:42,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:42,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:42,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 39 proven. 53 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-11-07 00:28:42,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834690232] [2020-11-07 00:28:42,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:42,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 00:28:42,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367610711] [2020-11-07 00:28:42,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 00:28:42,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:42,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 00:28:42,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:28:42,529 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 24 states. [2020-11-07 00:28:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:46,013 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-11-07 00:28:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 00:28:46,015 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 145 [2020-11-07 00:28:46,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:46,017 INFO L225 Difference]: With dead ends: 100 [2020-11-07 00:28:46,017 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 00:28:46,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=361, Invalid=2189, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 00:28:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 00:28:46,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-11-07 00:28:46,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 00:28:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2020-11-07 00:28:46,050 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 145 [2020-11-07 00:28:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:46,051 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2020-11-07 00:28:46,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 00:28:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2020-11-07 00:28:46,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 00:28:46,052 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:46,052 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:46,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 00:28:46,053 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:46,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:46,053 INFO L82 PathProgramCache]: Analyzing trace with hash -345081863, now seen corresponding path program 36 times [2020-11-07 00:28:46,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:46,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724393652] [2020-11-07 00:28:46,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:46,055 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:46,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:46,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:28:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:46,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:46,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:46,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:46,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:46,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:46,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:28:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:47,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:47,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:47,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:47,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:47,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:47,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 46 proven. 83 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-11-07 00:28:48,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724393652] [2020-11-07 00:28:48,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:48,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-11-07 00:28:48,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199716938] [2020-11-07 00:28:48,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 00:28:48,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:48,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 00:28:48,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 00:28:48,026 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand 37 states. [2020-11-07 00:28:49,170 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:28:49,400 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:28:49,804 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:28:50,097 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:28:50,302 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:50,560 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:50,813 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:28:51,001 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:51,239 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:51,505 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:28:51,695 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:51,923 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:52,188 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:28:52,374 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:28:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:54,024 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2020-11-07 00:28:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 00:28:54,025 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-11-07 00:28:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:54,027 INFO L225 Difference]: With dead ends: 100 [2020-11-07 00:28:54,027 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 00:28:54,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=458, Invalid=3964, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 00:28:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 00:28:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-11-07 00:28:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 00:28:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-11-07 00:28:54,058 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 155 [2020-11-07 00:28:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:54,058 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-11-07 00:28:54,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 00:28:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-11-07 00:28:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 00:28:54,060 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:54,060 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:28:54,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 00:28:54,060 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:54,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:54,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1329439012, now seen corresponding path program 37 times [2020-11-07 00:28:54,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:54,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241090825] [2020-11-07 00:28:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:54,063 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:54,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:54,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:28:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:54,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:54,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:54,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:54,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:54,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:54,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:28:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:55,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:55,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:55,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:55,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:55,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:55,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:56,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:28:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 51 proven. 88 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-11-07 00:28:56,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241090825] [2020-11-07 00:28:56,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:56,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-11-07 00:28:56,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124946206] [2020-11-07 00:28:56,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 00:28:56,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:56,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 00:28:56,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 00:28:56,280 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 39 states. [2020-11-07 00:28:57,574 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:28:57,816 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-11-07 00:28:58,226 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:28:58,544 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:28:58,774 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:59,071 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:59,368 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:28:59,565 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:28:59,804 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:00,097 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:29:00,299 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:00,541 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:00,839 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:29:01,045 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:29:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:29:03,740 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2020-11-07 00:29:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 00:29:03,742 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-11-07 00:29:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:29:03,743 INFO L225 Difference]: With dead ends: 100 [2020-11-07 00:29:03,743 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 00:29:03,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=505, Invalid=4607, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 00:29:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 00:29:03,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-11-07 00:29:03,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 00:29:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2020-11-07 00:29:03,777 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 165 [2020-11-07 00:29:03,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:29:03,777 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2020-11-07 00:29:03,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 00:29:03,777 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2020-11-07 00:29:03,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 00:29:03,778 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:29:03,779 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:29:03,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 00:29:03,779 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:29:03,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:29:03,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1103733159, now seen corresponding path program 38 times [2020-11-07 00:29:03,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:29:03,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879312746] [2020-11-07 00:29:03,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:29:03,781 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:29:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:03,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:29:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:03,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:29:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:04,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:04,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 00:29:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:04,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:04,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:04,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:04,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:04,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:04,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:04,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:05,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 42 proven. 35 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-07 00:29:05,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879312746] [2020-11-07 00:29:05,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:29:05,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-11-07 00:29:05,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940937] [2020-11-07 00:29:05,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 00:29:05,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:29:05,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 00:29:05,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 00:29:05,449 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 33 states. [2020-11-07 00:29:06,720 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-11-07 00:29:06,896 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-07 00:29:11,291 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 00:29:11,439 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-11-07 00:29:11,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:29:11,442 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2020-11-07 00:29:11,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 00:29:11,443 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-11-07 00:29:11,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:29:11,444 INFO L225 Difference]: With dead ends: 105 [2020-11-07 00:29:11,444 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 00:29:11,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=516, Invalid=4176, Unknown=0, NotChecked=0, Total=4692 [2020-11-07 00:29:11,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 00:29:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 00:29:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 00:29:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-11-07 00:29:11,474 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 135 [2020-11-07 00:29:11,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:29:11,474 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-11-07 00:29:11,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 00:29:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-11-07 00:29:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 00:29:11,476 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:29:11,476 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:29:11,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 00:29:11,476 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:29:11,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:29:11,476 INFO L82 PathProgramCache]: Analyzing trace with hash 665852356, now seen corresponding path program 39 times [2020-11-07 00:29:11,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:29:11,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17966415] [2020-11-07 00:29:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:29:11,478 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:29:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:11,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:29:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:11,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:29:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:11,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:11,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:11,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 00:29:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:12,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:12,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:12,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:12,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:12,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:12,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:12,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:13,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 44 proven. 60 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-07 00:29:13,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17966415] [2020-11-07 00:29:13,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:29:13,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-11-07 00:29:13,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216987347] [2020-11-07 00:29:13,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 00:29:13,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:29:13,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 00:29:13,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 00:29:13,280 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 35 states. [2020-11-07 00:29:14,472 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:29:14,703 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:29:14,883 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:29:15,100 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:29:15,389 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:29:15,596 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:29:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:29:20,156 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2020-11-07 00:29:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 00:29:20,158 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-11-07 00:29:20,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:29:20,159 INFO L225 Difference]: With dead ends: 109 [2020-11-07 00:29:20,160 INFO L226 Difference]: Without dead ends: 102 [2020-11-07 00:29:20,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=525, Invalid=4445, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 00:29:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-07 00:29:20,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2020-11-07 00:29:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 00:29:20,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-11-07 00:29:20,196 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 145 [2020-11-07 00:29:20,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:29:20,196 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-11-07 00:29:20,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 00:29:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-11-07 00:29:20,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 00:29:20,197 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:29:20,197 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:29:20,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 00:29:20,197 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:29:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:29:20,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1635613191, now seen corresponding path program 40 times [2020-11-07 00:29:20,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:29:20,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23413554] [2020-11-07 00:29:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:29:20,200 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:29:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:20,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:29:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:20,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:29:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:20,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:20,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:20,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:20,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 00:29:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:20,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:21,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:21,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:21,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:21,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:21,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:21,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:22,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 48 proven. 71 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-11-07 00:29:22,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23413554] [2020-11-07 00:29:22,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:29:22,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-11-07 00:29:22,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649332353] [2020-11-07 00:29:22,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 00:29:22,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:29:22,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 00:29:22,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 00:29:22,322 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 37 states. [2020-11-07 00:29:23,518 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:29:23,764 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:29:23,970 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:29:24,257 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:29:24,557 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:29:24,791 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:25,108 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:25,358 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:29:25,564 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:29:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:29:29,769 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2020-11-07 00:29:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 00:29:29,771 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-11-07 00:29:29,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:29:29,772 INFO L225 Difference]: With dead ends: 109 [2020-11-07 00:29:29,772 INFO L226 Difference]: Without dead ends: 102 [2020-11-07 00:29:29,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=534, Invalid=4722, Unknown=0, NotChecked=0, Total=5256 [2020-11-07 00:29:29,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-07 00:29:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2020-11-07 00:29:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 00:29:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-11-07 00:29:29,806 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 155 [2020-11-07 00:29:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:29:29,806 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-11-07 00:29:29,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 00:29:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-11-07 00:29:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 00:29:29,807 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:29:29,808 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:29:29,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 00:29:29,808 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:29:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:29:29,808 INFO L82 PathProgramCache]: Analyzing trace with hash -43499612, now seen corresponding path program 41 times [2020-11-07 00:29:29,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:29:29,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107589956] [2020-11-07 00:29:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:29:29,810 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:29:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:29,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:29:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:29,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:29:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:30,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:30,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:30,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:30,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:30,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 00:29:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:30,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:30,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:31,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:31,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:31,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:31,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:31,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:32,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 52 proven. 82 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-11-07 00:29:32,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107589956] [2020-11-07 00:29:32,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:29:32,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-11-07 00:29:32,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317379106] [2020-11-07 00:29:32,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 00:29:32,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:29:32,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 00:29:32,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 00:29:32,275 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 39 states. [2020-11-07 00:29:33,820 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:29:34,081 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:29:34,294 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:29:34,566 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 00:29:34,934 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:29:35,190 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:29:35,528 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:35,839 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:29:36,054 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:36,328 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:36,664 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:29:36,887 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:29:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:29:40,804 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2020-11-07 00:29:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 00:29:40,806 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-11-07 00:29:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:29:40,807 INFO L225 Difference]: With dead ends: 109 [2020-11-07 00:29:40,808 INFO L226 Difference]: Without dead ends: 102 [2020-11-07 00:29:40,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=543, Invalid=5007, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 00:29:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-07 00:29:40,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2020-11-07 00:29:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 00:29:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-11-07 00:29:40,839 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 165 [2020-11-07 00:29:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:29:40,839 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-11-07 00:29:40,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 00:29:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-11-07 00:29:40,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 00:29:40,840 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:29:40,840 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:29:40,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 00:29:40,840 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:29:40,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:29:40,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1893053849, now seen corresponding path program 42 times [2020-11-07 00:29:40,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:29:40,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764003496] [2020-11-07 00:29:40,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:29:40,843 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:29:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:41,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:29:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:41,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:29:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:41,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:41,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:41,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:41,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:41,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:41,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:29:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:41,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:42,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:42,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:42,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:42,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:42,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:43,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:43,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 56 proven. 93 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-11-07 00:29:43,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764003496] [2020-11-07 00:29:43,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:29:43,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-11-07 00:29:43,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531352771] [2020-11-07 00:29:43,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 00:29:43,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:29:43,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 00:29:43,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 00:29:43,518 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 41 states. [2020-11-07 00:29:45,013 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:29:45,289 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:29:45,498 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:29:45,814 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:29:46,181 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:29:46,441 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:46,802 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:47,086 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:29:47,310 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:47,667 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:47,964 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:29:48,195 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:48,542 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:48,839 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:29:49,072 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:29:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:29:52,714 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2020-11-07 00:29:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 00:29:52,716 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-11-07 00:29:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:29:52,718 INFO L225 Difference]: With dead ends: 105 [2020-11-07 00:29:52,718 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 00:29:52,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=552, Invalid=5300, Unknown=0, NotChecked=0, Total=5852 [2020-11-07 00:29:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 00:29:52,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2020-11-07 00:29:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-07 00:29:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-11-07 00:29:52,757 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 175 [2020-11-07 00:29:52,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:29:52,757 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-11-07 00:29:52,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 00:29:52,757 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-11-07 00:29:52,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 00:29:52,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:29:52,759 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:29:52,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 00:29:52,759 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:29:52,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:29:52,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1520258748, now seen corresponding path program 43 times [2020-11-07 00:29:52,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:29:52,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22900474] [2020-11-07 00:29:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:29:52,763 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:29:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:52,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:29:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:52,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:29:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:53,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:53,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:53,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:53,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:53,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:53,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:53,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:29:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:54,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:54,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:54,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:54,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:29:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:29:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 38 proven. 76 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-07 00:29:54,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22900474] [2020-11-07 00:29:54,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:29:54,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-11-07 00:29:54,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847914301] [2020-11-07 00:29:54,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 00:29:54,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:29:54,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 00:29:54,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 00:29:54,782 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 35 states. [2020-11-07 00:29:56,074 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:29:56,317 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:29:56,513 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:29:56,800 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:29:57,115 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:29:57,354 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:57,676 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:57,925 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:29:58,152 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:58,452 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:29:58,717 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:29:58,932 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:30:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:30:01,523 INFO L93 Difference]: Finished difference Result 105 states and 132 transitions. [2020-11-07 00:30:01,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 00:30:01,526 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-11-07 00:30:01,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:30:01,527 INFO L225 Difference]: With dead ends: 105 [2020-11-07 00:30:01,527 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 00:30:01,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=449, Invalid=3711, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 00:30:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 00:30:01,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 00:30:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 00:30:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2020-11-07 00:30:01,567 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 145 [2020-11-07 00:30:01,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:30:01,567 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2020-11-07 00:30:01,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 00:30:01,567 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2020-11-07 00:30:01,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 00:30:01,568 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:30:01,568 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:30:01,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 00:30:01,569 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:30:01,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:30:01,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1472500335, now seen corresponding path program 44 times [2020-11-07 00:30:01,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:30:01,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379577660] [2020-11-07 00:30:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:30:01,571 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:30:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:01,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:30:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:01,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:30:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:01,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:01,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:02,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:02,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:02,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:02,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:02,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:30:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:02,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:03,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:03,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:03,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:03,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 43 proven. 86 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-11-07 00:30:03,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379577660] [2020-11-07 00:30:03,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:30:03,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-11-07 00:30:03,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140692407] [2020-11-07 00:30:03,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 00:30:03,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:30:03,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 00:30:03,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 00:30:03,760 INFO L87 Difference]: Start difference. First operand 93 states and 120 transitions. Second operand 37 states. [2020-11-07 00:30:05,072 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:30:05,333 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:30:05,531 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:30:05,786 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:30:06,141 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:30:06,384 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:06,697 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:07,002 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:30:07,217 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:07,477 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:07,780 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:30:07,999 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:08,262 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:08,587 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:30:08,811 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:30:11,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:30:11,001 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2020-11-07 00:30:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 00:30:11,003 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-11-07 00:30:11,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:30:11,005 INFO L225 Difference]: With dead ends: 105 [2020-11-07 00:30:11,005 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 00:30:11,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=458, Invalid=3964, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 00:30:11,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 00:30:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 00:30:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 00:30:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 119 transitions. [2020-11-07 00:30:11,044 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 119 transitions. Word has length 155 [2020-11-07 00:30:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:30:11,044 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 119 transitions. [2020-11-07 00:30:11,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 00:30:11,044 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 119 transitions. [2020-11-07 00:30:11,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 00:30:11,045 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:30:11,045 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:30:11,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 00:30:11,046 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:30:11,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:30:11,046 INFO L82 PathProgramCache]: Analyzing trace with hash -526892188, now seen corresponding path program 45 times [2020-11-07 00:30:11,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:30:11,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317794793] [2020-11-07 00:30:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:30:11,048 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:30:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:11,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:30:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:11,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:30:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:11,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:11,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:11,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:11,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:11,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:12,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:12,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:30:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:12,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:12,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:12,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:12,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:12,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:12,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 48 proven. 64 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-11-07 00:30:12,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317794793] [2020-11-07 00:30:12,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:30:12,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-11-07 00:30:12,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547209386] [2020-11-07 00:30:12,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 00:30:12,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:30:12,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 00:30:12,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-11-07 00:30:12,364 INFO L87 Difference]: Start difference. First operand 93 states and 119 transitions. Second operand 26 states. [2020-11-07 00:30:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:30:17,238 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2020-11-07 00:30:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 00:30:17,240 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 165 [2020-11-07 00:30:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:30:17,242 INFO L225 Difference]: With dead ends: 105 [2020-11-07 00:30:17,242 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 00:30:17,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=408, Invalid=2672, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 00:30:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 00:30:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 00:30:17,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 00:30:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-11-07 00:30:17,282 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 165 [2020-11-07 00:30:17,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:30:17,282 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-11-07 00:30:17,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 00:30:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-11-07 00:30:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 00:30:17,283 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:30:17,283 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:30:17,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 00:30:17,283 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:30:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:30:17,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2014632367, now seen corresponding path program 46 times [2020-11-07 00:30:17,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:30:17,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918269910] [2020-11-07 00:30:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:30:17,286 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:30:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:17,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:30:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:17,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:30:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:17,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:17,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:17,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:17,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:17,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:18,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:18,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:30:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:18,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-11-07 00:30:18,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918269910] [2020-11-07 00:30:18,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:30:18,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-11-07 00:30:18,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728249631] [2020-11-07 00:30:18,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 00:30:18,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:30:18,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 00:30:18,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-11-07 00:30:18,643 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 29 states. [2020-11-07 00:30:19,788 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-11-07 00:30:20,023 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 00:30:20,205 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-07 00:30:23,440 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-11-07 00:30:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:30:23,943 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2020-11-07 00:30:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 00:30:23,945 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 00:30:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:30:23,947 INFO L225 Difference]: With dead ends: 105 [2020-11-07 00:30:23,947 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 00:30:23,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=422, Invalid=3000, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 00:30:23,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 00:30:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 00:30:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 00:30:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2020-11-07 00:30:23,986 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 115 [2020-11-07 00:30:23,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:30:23,987 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2020-11-07 00:30:23,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 00:30:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2020-11-07 00:30:23,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 00:30:23,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:30:23,988 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:30:23,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 00:30:23,988 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:30:23,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:30:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash 981230287, now seen corresponding path program 47 times [2020-11-07 00:30:23,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:30:23,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240563957] [2020-11-07 00:30:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:30:23,991 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:30:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:24,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:30:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:24,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:30:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:24,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:24,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:24,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:24,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:24,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:25,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:25,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:30:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:25,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:25,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:25,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:25,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:26,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:26,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:26,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 55 proven. 99 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-11-07 00:30:26,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240563957] [2020-11-07 00:30:26,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:30:26,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-11-07 00:30:26,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930529469] [2020-11-07 00:30:26,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 00:30:26,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:30:26,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 00:30:26,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 00:30:26,782 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand 41 states. [2020-11-07 00:30:28,322 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:30:28,600 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:30:28,836 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:30:29,167 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:30:29,552 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:30:29,819 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:30,192 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:30,481 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:30:30,718 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:31,058 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:31,355 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:30:31,581 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:31,924 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:32,210 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:30:32,446 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:32,786 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:33,081 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:30:33,308 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:30:35,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:30:35,916 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2020-11-07 00:30:35,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 00:30:35,917 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-11-07 00:30:35,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:30:35,918 INFO L225 Difference]: With dead ends: 105 [2020-11-07 00:30:35,918 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 00:30:35,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=514, Invalid=4888, Unknown=0, NotChecked=0, Total=5402 [2020-11-07 00:30:35,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 00:30:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 00:30:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 00:30:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-11-07 00:30:35,958 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 175 [2020-11-07 00:30:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:30:35,959 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-11-07 00:30:35,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 00:30:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-11-07 00:30:35,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 00:30:35,960 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:30:35,960 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:30:35,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 00:30:35,960 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:30:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:30:35,961 INFO L82 PathProgramCache]: Analyzing trace with hash -892159473, now seen corresponding path program 48 times [2020-11-07 00:30:35,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:30:35,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809136229] [2020-11-07 00:30:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:30:35,963 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:30:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:36,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:30:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:36,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:30:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:36,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:36,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:36,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:36,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:36,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:36,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:37,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:30:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:37,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:37,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:37,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 33 proven. 66 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-11-07 00:30:37,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809136229] [2020-11-07 00:30:37,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:30:37,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-11-07 00:30:37,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166690197] [2020-11-07 00:30:37,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 00:30:37,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:30:37,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 00:30:37,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 00:30:37,751 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 33 states. [2020-11-07 00:30:39,025 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:30:39,279 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:30:39,488 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:30:39,788 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 00:30:40,112 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:30:40,349 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:30:40,671 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:40,921 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:30:41,128 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:30:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:30:44,084 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2020-11-07 00:30:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 00:30:44,087 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-11-07 00:30:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:30:44,089 INFO L225 Difference]: With dead ends: 105 [2020-11-07 00:30:44,089 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 00:30:44,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 00:30:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 00:30:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 00:30:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 00:30:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2020-11-07 00:30:44,124 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 135 [2020-11-07 00:30:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:30:44,124 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2020-11-07 00:30:44,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 00:30:44,125 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2020-11-07 00:30:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-11-07 00:30:44,126 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:30:44,126 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:30:44,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-07 00:30:44,126 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:30:44,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:30:44,127 INFO L82 PathProgramCache]: Analyzing trace with hash -971334268, now seen corresponding path program 49 times [2020-11-07 00:30:44,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:30:44,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018830287] [2020-11-07 00:30:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:30:44,129 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:30:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:44,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:30:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:44,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:30:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:44,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:44,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:44,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:44,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:44,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:45,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:45,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:30:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:45,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:45,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:45,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:46,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:46,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:46,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:46,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:46,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 60 proven. 104 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-11-07 00:30:47,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018830287] [2020-11-07 00:30:47,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:30:47,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-11-07 00:30:47,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033294766] [2020-11-07 00:30:47,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 00:30:47,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:30:47,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 00:30:47,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 00:30:47,230 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand 43 states. [2020-11-07 00:30:48,865 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:30:49,179 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:30:49,423 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:30:49,727 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:30:50,139 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:30:50,427 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:50,815 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:51,193 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:30:51,434 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:51,738 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:52,100 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:30:52,344 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:52,653 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:53,025 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:30:53,272 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:53,575 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:30:53,958 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:30:54,206 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:30:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:30:57,689 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2020-11-07 00:30:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 00:30:57,692 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 185 [2020-11-07 00:30:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:30:57,693 INFO L225 Difference]: With dead ends: 105 [2020-11-07 00:30:57,693 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 00:30:57,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=561, Invalid=5601, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 00:30:57,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 00:30:57,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 00:30:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 00:30:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-11-07 00:30:57,746 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 185 [2020-11-07 00:30:57,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:30:57,746 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-11-07 00:30:57,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 00:30:57,747 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-11-07 00:30:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 00:30:57,747 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:30:57,748 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:30:57,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-07 00:30:57,748 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:30:57,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:30:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash -299112668, now seen corresponding path program 50 times [2020-11-07 00:30:57,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:30:57,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707496499] [2020-11-07 00:30:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:30:57,751 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:30:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:57,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:30:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:57,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:30:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:58,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:58,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:58,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:58,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:58,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:58,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:58,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:30:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:59,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:59,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:30:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:30:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-11-07 00:30:59,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707496499] [2020-11-07 00:30:59,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:30:59,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-11-07 00:30:59,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402818711] [2020-11-07 00:30:59,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 00:30:59,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:30:59,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 00:30:59,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-11-07 00:30:59,421 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 31 states. [2020-11-07 00:31:00,719 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:31:00,989 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:31:01,203 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:31:01,468 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:31:01,793 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:31:02,026 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:31:05,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:31:05,439 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2020-11-07 00:31:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 00:31:05,441 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-11-07 00:31:05,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:31:05,442 INFO L225 Difference]: With dead ends: 105 [2020-11-07 00:31:05,442 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 00:31:05,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=431, Invalid=3229, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 00:31:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 00:31:05,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2020-11-07 00:31:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-07 00:31:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-11-07 00:31:05,481 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 125 [2020-11-07 00:31:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:31:05,482 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-11-07 00:31:05,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 00:31:05,482 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-11-07 00:31:05,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 00:31:05,483 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:31:05,483 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:31:05,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-07 00:31:05,483 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:31:05,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:31:05,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1455465924, now seen corresponding path program 51 times [2020-11-07 00:31:05,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:31:05,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684466553] [2020-11-07 00:31:05,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:31:05,485 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:31:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:05,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:31:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:05,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:31:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:05,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:05,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 00:31:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:05,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:06,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:06,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:06,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:06,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:06,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:06,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:07,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:07,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 47 proven. 38 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2020-11-07 00:31:07,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684466553] [2020-11-07 00:31:07,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:31:07,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-11-07 00:31:07,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171794933] [2020-11-07 00:31:07,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 00:31:07,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:31:07,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 00:31:07,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 00:31:07,614 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 35 states. [2020-11-07 00:31:09,098 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-11-07 00:31:09,427 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 00:31:09,694 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-07 00:31:15,842 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 00:31:16,066 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-11-07 00:31:16,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:31:16,573 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2020-11-07 00:31:16,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 00:31:16,576 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-11-07 00:31:16,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:31:16,578 INFO L225 Difference]: With dead ends: 110 [2020-11-07 00:31:16,578 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 00:31:16,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=563, Invalid=4839, Unknown=0, NotChecked=0, Total=5402 [2020-11-07 00:31:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 00:31:16,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 00:31:16,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 00:31:16,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-11-07 00:31:16,632 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 145 [2020-11-07 00:31:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:31:16,632 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-11-07 00:31:16,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 00:31:16,632 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-11-07 00:31:16,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 00:31:16,633 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:31:16,634 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:31:16,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-11-07 00:31:16,634 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:31:16,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:31:16,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1193498479, now seen corresponding path program 52 times [2020-11-07 00:31:16,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:31:16,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917021128] [2020-11-07 00:31:16,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:31:16,637 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:31:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:16,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:31:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:16,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:31:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:16,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:17,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:17,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 00:31:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:17,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:17,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:17,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:17,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:18,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:18,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:18,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:18,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:18,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 49 proven. 65 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-11-07 00:31:19,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917021128] [2020-11-07 00:31:19,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:31:19,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-11-07 00:31:19,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946658007] [2020-11-07 00:31:19,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 00:31:19,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:31:19,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 00:31:19,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 00:31:19,219 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 37 states. [2020-11-07 00:31:20,765 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:31:21,089 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:31:21,334 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:31:21,640 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:31:22,036 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:31:22,325 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:31:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:31:28,988 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-11-07 00:31:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 00:31:28,991 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-11-07 00:31:28,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:31:28,993 INFO L225 Difference]: With dead ends: 114 [2020-11-07 00:31:28,993 INFO L226 Difference]: Without dead ends: 107 [2020-11-07 00:31:28,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=572, Invalid=5128, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 00:31:28,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-07 00:31:29,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-11-07 00:31:29,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 00:31:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-11-07 00:31:29,041 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 155 [2020-11-07 00:31:29,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:31:29,041 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-11-07 00:31:29,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 00:31:29,041 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-11-07 00:31:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 00:31:29,042 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:31:29,042 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:31:29,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-11-07 00:31:29,042 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:31:29,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:31:29,043 INFO L82 PathProgramCache]: Analyzing trace with hash 775406948, now seen corresponding path program 53 times [2020-11-07 00:31:29,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:31:29,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573570280] [2020-11-07 00:31:29,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:31:29,045 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:31:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:29,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:31:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:29,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:31:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:29,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:29,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:29,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:29,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 00:31:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:30,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:30,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:30,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:30,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:30,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:30,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:31,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:31,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:31,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 53 proven. 76 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-11-07 00:31:31,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573570280] [2020-11-07 00:31:31,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:31:31,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-11-07 00:31:31,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44060499] [2020-11-07 00:31:31,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 00:31:31,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:31:31,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 00:31:31,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 00:31:31,963 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 39 states. [2020-11-07 00:31:33,930 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:31:34,269 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:31:34,543 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:31:34,876 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:31:35,356 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:31:35,692 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:31:36,163 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:31:36,583 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:31:36,860 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:31:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:31:44,053 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-11-07 00:31:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 00:31:44,055 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-11-07 00:31:44,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:31:44,057 INFO L225 Difference]: With dead ends: 114 [2020-11-07 00:31:44,057 INFO L226 Difference]: Without dead ends: 107 [2020-11-07 00:31:44,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=581, Invalid=5425, Unknown=0, NotChecked=0, Total=6006 [2020-11-07 00:31:44,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-07 00:31:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-11-07 00:31:44,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 00:31:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-11-07 00:31:44,109 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 165 [2020-11-07 00:31:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:31:44,109 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-11-07 00:31:44,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 00:31:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-11-07 00:31:44,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 00:31:44,110 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:31:44,110 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:31:44,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-11-07 00:31:44,110 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:31:44,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:31:44,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1395808945, now seen corresponding path program 54 times [2020-11-07 00:31:44,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:31:44,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150805145] [2020-11-07 00:31:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:31:44,112 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:31:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:44,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:31:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:44,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:31:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:44,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:44,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:44,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:44,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:45,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 00:31:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:45,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:45,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:45,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:45,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:46,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:46,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:46,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:46,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:47,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:31:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 57 proven. 87 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-11-07 00:31:47,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150805145] [2020-11-07 00:31:47,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:31:47,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-11-07 00:31:47,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535117796] [2020-11-07 00:31:47,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 00:31:47,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:31:47,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 00:31:47,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 00:31:47,519 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 41 states. [2020-11-07 00:31:49,423 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:31:49,788 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:31:50,070 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:31:50,416 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:31:50,891 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:31:51,245 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:31:51,691 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:31:52,111 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:31:52,405 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:31:52,773 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:31:53,213 WARN L194 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:31:53,515 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:31:59,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:31:59,663 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-11-07 00:31:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 00:31:59,666 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-11-07 00:31:59,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:31:59,668 INFO L225 Difference]: With dead ends: 114 [2020-11-07 00:31:59,668 INFO L226 Difference]: Without dead ends: 107 [2020-11-07 00:31:59,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=590, Invalid=5730, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 00:31:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-07 00:31:59,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-11-07 00:31:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 00:31:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-11-07 00:31:59,731 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 175 [2020-11-07 00:31:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:31:59,731 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-11-07 00:31:59,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 00:31:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-11-07 00:31:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-11-07 00:31:59,732 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:31:59,733 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:31:59,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-11-07 00:31:59,733 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:31:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:31:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2138313468, now seen corresponding path program 55 times [2020-11-07 00:31:59,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:31:59,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885638290] [2020-11-07 00:31:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:31:59,735 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:31:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:59,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:31:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:31:59,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:31:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:00,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:00,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:00,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:00,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:00,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:01,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:32:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:01,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:01,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:01,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:01,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:02,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:02,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:02,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:03,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:03,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 61 proven. 98 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-11-07 00:32:03,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885638290] [2020-11-07 00:32:03,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:32:03,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-11-07 00:32:03,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173416301] [2020-11-07 00:32:03,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 00:32:03,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:32:03,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 00:32:03,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 00:32:03,653 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 43 states. [2020-11-07 00:32:05,841 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:32:06,243 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:32:06,538 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:32:06,987 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:32:07,508 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:32:07,872 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:32:08,385 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:32:08,775 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:32:09,081 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:32:09,525 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:32:09,914 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:32:10,221 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:32:10,682 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:32:11,093 WARN L194 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:32:11,411 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:32:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:32:17,591 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-11-07 00:32:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 00:32:17,595 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 185 [2020-11-07 00:32:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:32:17,597 INFO L225 Difference]: With dead ends: 114 [2020-11-07 00:32:17,597 INFO L226 Difference]: Without dead ends: 107 [2020-11-07 00:32:17,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=599, Invalid=6043, Unknown=0, NotChecked=0, Total=6642 [2020-11-07 00:32:17,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-07 00:32:17,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-11-07 00:32:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 00:32:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-11-07 00:32:17,650 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 185 [2020-11-07 00:32:17,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:32:17,651 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-11-07 00:32:17,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 00:32:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-11-07 00:32:17,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-11-07 00:32:17,652 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:32:17,652 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:32:17,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-11-07 00:32:17,653 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:32:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:32:17,653 INFO L82 PathProgramCache]: Analyzing trace with hash 470559535, now seen corresponding path program 56 times [2020-11-07 00:32:17,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:32:17,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734360128] [2020-11-07 00:32:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:32:17,655 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:32:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:17,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:32:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:17,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:32:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:18,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:18,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:18,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:18,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:18,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:18,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:19,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:32:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:19,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:19,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:19,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:20,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:20,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:20,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:20,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:21,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:21,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 65 proven. 109 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-11-07 00:32:21,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734360128] [2020-11-07 00:32:21,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:32:21,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-11-07 00:32:21,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376784315] [2020-11-07 00:32:21,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 00:32:21,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:32:21,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 00:32:21,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1866, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 00:32:21,863 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 45 states. [2020-11-07 00:32:24,089 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:32:24,488 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:32:24,800 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:32:25,264 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:32:25,779 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:32:26,150 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:32:26,658 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:32:27,071 WARN L194 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:32:27,398 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:32:27,842 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:32:28,246 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:32:28,558 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:32:29,010 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:32:29,411 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:32:29,729 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:32:30,188 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:32:30,585 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:32:30,887 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:32:36,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:32:36,094 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2020-11-07 00:32:36,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 00:32:36,097 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 195 [2020-11-07 00:32:36,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:32:36,099 INFO L225 Difference]: With dead ends: 110 [2020-11-07 00:32:36,099 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 00:32:36,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=608, Invalid=6364, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 00:32:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 00:32:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2020-11-07 00:32:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-07 00:32:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2020-11-07 00:32:36,146 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 195 [2020-11-07 00:32:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:32:36,146 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2020-11-07 00:32:36,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 00:32:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2020-11-07 00:32:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 00:32:36,147 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:32:36,147 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:32:36,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-11-07 00:32:36,147 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:32:36,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:32:36,148 INFO L82 PathProgramCache]: Analyzing trace with hash 289242404, now seen corresponding path program 57 times [2020-11-07 00:32:36,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:32:36,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776578289] [2020-11-07 00:32:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:32:36,150 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:32:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:36,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:32:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:36,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:32:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:36,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:36,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:36,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:36,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:37,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:37,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:37,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:37,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 00:32:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:38,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 15 proven. 54 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-11-07 00:32:38,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776578289] [2020-11-07 00:32:38,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:32:38,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-11-07 00:32:38,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821927992] [2020-11-07 00:32:38,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 00:32:38,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:32:38,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 00:32:38,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-11-07 00:32:38,261 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand 31 states. [2020-11-07 00:32:39,843 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-11-07 00:32:40,153 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 00:32:40,389 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-07 00:32:45,950 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-11-07 00:32:46,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:32:46,471 INFO L93 Difference]: Finished difference Result 110 states and 140 transitions. [2020-11-07 00:32:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 00:32:46,474 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-11-07 00:32:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:32:46,476 INFO L225 Difference]: With dead ends: 110 [2020-11-07 00:32:46,476 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 00:32:46,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=469, Invalid=3563, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 00:32:46,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 00:32:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 00:32:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 00:32:46,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2020-11-07 00:32:46,508 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 125 [2020-11-07 00:32:46,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:32:46,509 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2020-11-07 00:32:46,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 00:32:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2020-11-07 00:32:46,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-11-07 00:32:46,510 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:32:46,510 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:32:46,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-11-07 00:32:46,510 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:32:46,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:32:46,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2070355772, now seen corresponding path program 58 times [2020-11-07 00:32:46,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:32:46,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088517568] [2020-11-07 00:32:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:32:46,513 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:32:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:46,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:32:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:46,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:32:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:46,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:46,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:47,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:47,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:47,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:47,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:48,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:48,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 00:32:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:48,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:48,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:48,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:48,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:48,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:48,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:48,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 57 proven. 75 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-11-07 00:32:48,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088517568] [2020-11-07 00:32:48,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:32:48,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 00:32:48,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80141827] [2020-11-07 00:32:48,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 00:32:48,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:32:48,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 00:32:48,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2020-11-07 00:32:48,518 INFO L87 Difference]: Start difference. First operand 98 states and 128 transitions. Second operand 28 states. [2020-11-07 00:32:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:32:56,094 INFO L93 Difference]: Finished difference Result 110 states and 139 transitions. [2020-11-07 00:32:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 00:32:56,098 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 185 [2020-11-07 00:32:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:32:56,099 INFO L225 Difference]: With dead ends: 110 [2020-11-07 00:32:56,100 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 00:32:56,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=455, Invalid=3205, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 00:32:56,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 00:32:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 00:32:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 00:32:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2020-11-07 00:32:56,147 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 185 [2020-11-07 00:32:56,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:32:56,147 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2020-11-07 00:32:56,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 00:32:56,147 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2020-11-07 00:32:56,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-11-07 00:32:56,148 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:32:56,149 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:32:56,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-11-07 00:32:56,149 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:32:56,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:32:56,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1197337913, now seen corresponding path program 59 times [2020-11-07 00:32:56,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:32:56,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813709751] [2020-11-07 00:32:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:32:56,151 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:32:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:56,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:32:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:56,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:32:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:56,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:56,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:56,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:57,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:57,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:57,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:57,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:58,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 00:32:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:58,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:58,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:58,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:59,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:59,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:32:59,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:32:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:00,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:00,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 64 proven. 115 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-11-07 00:33:00,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813709751] [2020-11-07 00:33:00,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:33:00,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-11-07 00:33:00,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006576451] [2020-11-07 00:33:00,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 00:33:00,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:33:00,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 00:33:00,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1866, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 00:33:00,626 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand 45 states. [2020-11-07 00:33:02,909 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:33:03,355 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:33:03,687 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:33:04,163 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:33:04,692 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:33:05,073 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:05,594 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:06,036 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:33:06,351 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:06,832 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:07,259 WARN L194 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:33:07,597 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:08,073 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:08,499 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:33:08,820 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:09,287 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:09,710 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:33:10,031 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:10,518 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:10,951 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:33:11,270 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:33:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:33:14,853 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2020-11-07 00:33:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 00:33:14,857 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 195 [2020-11-07 00:33:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:33:14,859 INFO L225 Difference]: With dead ends: 110 [2020-11-07 00:33:14,859 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 00:33:14,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=570, Invalid=5910, Unknown=0, NotChecked=0, Total=6480 [2020-11-07 00:33:14,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 00:33:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 00:33:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 00:33:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2020-11-07 00:33:14,906 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 195 [2020-11-07 00:33:14,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:33:14,906 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2020-11-07 00:33:14,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 00:33:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2020-11-07 00:33:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 00:33:14,907 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:33:14,908 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:33:14,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-11-07 00:33:14,908 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:33:14,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:33:14,908 INFO L82 PathProgramCache]: Analyzing trace with hash -377365276, now seen corresponding path program 60 times [2020-11-07 00:33:14,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:33:14,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780597015] [2020-11-07 00:33:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:33:14,910 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:33:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:15,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:33:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:15,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:33:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:15,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:15,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:15,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:15,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:15,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:16,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:16,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:16,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 00:33:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:17,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:17,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:17,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:18,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:18,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 47 proven. 92 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-11-07 00:33:18,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780597015] [2020-11-07 00:33:18,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:33:18,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-11-07 00:33:18,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049319504] [2020-11-07 00:33:18,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 00:33:18,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:33:18,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 00:33:18,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 00:33:18,534 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand 39 states. [2020-11-07 00:33:20,561 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:33:20,966 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-11-07 00:33:21,269 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:33:21,702 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:33:22,198 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:33:22,548 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:23,029 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:23,424 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:33:23,746 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:24,188 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:24,592 WARN L194 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:33:24,912 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:25,484 WARN L194 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:25,986 WARN L194 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:33:26,308 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:33:30,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:33:30,000 INFO L93 Difference]: Finished difference Result 110 states and 137 transitions. [2020-11-07 00:33:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 00:33:30,004 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-11-07 00:33:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:33:30,006 INFO L225 Difference]: With dead ends: 110 [2020-11-07 00:33:30,006 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 00:33:30,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=505, Invalid=4607, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 00:33:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 00:33:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 00:33:30,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 00:33:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 125 transitions. [2020-11-07 00:33:30,048 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 125 transitions. Word has length 165 [2020-11-07 00:33:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:33:30,048 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 125 transitions. [2020-11-07 00:33:30,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 00:33:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 125 transitions. [2020-11-07 00:33:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 00:33:30,049 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:33:30,049 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:33:30,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-11-07 00:33:30,050 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:33:30,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:33:30,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1714688260, now seen corresponding path program 61 times [2020-11-07 00:33:30,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:33:30,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229107639] [2020-11-07 00:33:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:33:30,052 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:33:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:30,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:33:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:30,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:33:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:30,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:30,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:30,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:30,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:31,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:31,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:31,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:32,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 00:33:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:32,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:32,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:32,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 37 proven. 72 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-07 00:33:33,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229107639] [2020-11-07 00:33:33,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:33:33,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-11-07 00:33:33,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558702084] [2020-11-07 00:33:33,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 00:33:33,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:33:33,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 00:33:33,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 00:33:33,022 INFO L87 Difference]: Start difference. First operand 98 states and 125 transitions. Second operand 35 states. [2020-11-07 00:33:35,046 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:33:35,432 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:33:35,749 WARN L194 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:33:36,189 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:33:36,691 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:33:37,058 WARN L194 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:37,537 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:37,916 WARN L194 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:33:38,223 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:33:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:33:43,895 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2020-11-07 00:33:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 00:33:43,895 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-11-07 00:33:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:33:43,896 INFO L225 Difference]: With dead ends: 110 [2020-11-07 00:33:43,896 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 00:33:43,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=487, Invalid=4069, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 00:33:43,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 00:33:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 00:33:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 00:33:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2020-11-07 00:33:43,945 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 145 [2020-11-07 00:33:43,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:33:43,945 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2020-11-07 00:33:43,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 00:33:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2020-11-07 00:33:43,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-11-07 00:33:43,946 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:33:43,947 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:33:43,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-11-07 00:33:43,947 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:33:43,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:33:43,947 INFO L82 PathProgramCache]: Analyzing trace with hash -26534748, now seen corresponding path program 62 times [2020-11-07 00:33:43,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:33:43,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242476783] [2020-11-07 00:33:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:33:43,950 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:33:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:44,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:33:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:44,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:33:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:44,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:44,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:44,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:44,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:45,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:45,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:45,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:45,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 00:33:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:46,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:46,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:46,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:47,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:47,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:47,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:48,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:48,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:48,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:33:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:33:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 69 proven. 120 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2020-11-07 00:33:49,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242476783] [2020-11-07 00:33:49,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:33:49,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-11-07 00:33:49,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283749599] [2020-11-07 00:33:49,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-07 00:33:49,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:33:49,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-07 00:33:49,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2043, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 00:33:49,220 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand 47 states. [2020-11-07 00:33:51,730 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:33:52,209 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:33:52,579 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:33:53,037 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:33:53,630 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:33:54,056 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:54,632 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:55,190 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:33:55,554 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:56,006 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:56,559 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:33:56,924 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:57,386 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:57,953 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:33:58,314 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:58,768 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:33:59,295 WARN L194 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:33:59,641 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:34:00,103 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:34:00,642 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:34:01,005 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:34:05,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:34:05,989 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-11-07 00:34:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 00:34:05,993 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 205 [2020-11-07 00:34:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:34:05,995 INFO L225 Difference]: With dead ends: 110 [2020-11-07 00:34:05,995 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 00:34:05,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=617, Invalid=6693, Unknown=0, NotChecked=0, Total=7310 [2020-11-07 00:34:05,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 00:34:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 00:34:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 00:34:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 123 transitions. [2020-11-07 00:34:06,038 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 123 transitions. Word has length 205 [2020-11-07 00:34:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:34:06,039 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 123 transitions. [2020-11-07 00:34:06,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-07 00:34:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 123 transitions. [2020-11-07 00:34:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 00:34:06,040 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:34:06,040 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:34:06,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-11-07 00:34:06,040 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:34:06,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:34:06,041 INFO L82 PathProgramCache]: Analyzing trace with hash -542475175, now seen corresponding path program 63 times [2020-11-07 00:34:06,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:34:06,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459961691] [2020-11-07 00:34:06,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:34:06,042 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:34:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:06,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:34:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:06,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:34:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:06,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:06,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:06,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:06,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:07,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:07,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:07,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:08,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 00:34:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:08,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:08,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-11-07 00:34:08,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459961691] [2020-11-07 00:34:08,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:34:08,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-11-07 00:34:08,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407335783] [2020-11-07 00:34:08,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 00:34:08,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:34:08,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 00:34:08,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 00:34:08,733 INFO L87 Difference]: Start difference. First operand 98 states and 123 transitions. Second operand 33 states. [2020-11-07 00:34:10,570 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:34:10,938 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:34:11,242 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:34:11,610 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:34:12,051 WARN L194 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:34:12,384 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:34:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:34:18,490 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2020-11-07 00:34:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 00:34:18,494 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-11-07 00:34:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:34:18,496 INFO L225 Difference]: With dead ends: 110 [2020-11-07 00:34:18,496 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 00:34:18,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=478, Invalid=3812, Unknown=0, NotChecked=0, Total=4290 [2020-11-07 00:34:18,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 00:34:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 00:34:18,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 00:34:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2020-11-07 00:34:18,534 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 135 [2020-11-07 00:34:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:34:18,534 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2020-11-07 00:34:18,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 00:34:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2020-11-07 00:34:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 00:34:18,535 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:34:18,535 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:34:18,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-11-07 00:34:18,535 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:34:18,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:34:18,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1905288711, now seen corresponding path program 64 times [2020-11-07 00:34:18,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:34:18,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553486116] [2020-11-07 00:34:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:34:18,537 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:34:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:18,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:34:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:18,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:34:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:18,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:19,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:19,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:19,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:19,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:19,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:20,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:20,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 00:34:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:21,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:21,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:21,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:21,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 42 proven. 82 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-11-07 00:34:22,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553486116] [2020-11-07 00:34:22,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:34:22,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-11-07 00:34:22,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332846715] [2020-11-07 00:34:22,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 00:34:22,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:34:22,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 00:34:22,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 00:34:22,208 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand 37 states. [2020-11-07 00:34:24,728 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:34:25,166 WARN L194 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:34:25,505 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:34:25,943 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:34:26,539 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:34:26,966 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:34:27,525 WARN L194 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:34:28,043 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:34:28,390 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:34:28,820 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:34:29,307 WARN L194 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:34:29,644 WARN L194 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:34:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:34:35,605 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2020-11-07 00:34:35,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 00:34:35,609 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-11-07 00:34:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:34:35,611 INFO L225 Difference]: With dead ends: 110 [2020-11-07 00:34:35,611 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 00:34:35,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=496, Invalid=4334, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 00:34:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 00:34:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 00:34:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 00:34:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-11-07 00:34:35,660 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 155 [2020-11-07 00:34:35,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:34:35,661 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-11-07 00:34:35,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 00:34:35,661 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-11-07 00:34:35,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 00:34:35,662 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:34:35,662 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:34:35,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-11-07 00:34:35,662 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:34:35,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:34:35,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1380368281, now seen corresponding path program 65 times [2020-11-07 00:34:35,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:34:35,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198778558] [2020-11-07 00:34:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:34:35,665 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:34:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:35,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:34:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:35,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:34:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:36,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:36,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:36,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:36,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:36,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:37,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:37,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:37,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 00:34:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:38,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:38,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:38,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:39,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:39,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:40,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 52 proven. 102 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-11-07 00:34:40,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198778558] [2020-11-07 00:34:40,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:34:40,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-11-07 00:34:40,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39065214] [2020-11-07 00:34:40,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 00:34:40,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:34:40,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 00:34:40,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 00:34:40,348 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 41 states. [2020-11-07 00:34:43,062 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:34:43,553 WARN L194 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:34:43,935 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:34:44,418 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:34:45,081 WARN L194 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:34:45,530 WARN L194 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:34:46,140 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:34:46,711 WARN L194 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:34:47,097 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:34:47,584 WARN L194 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:34:48,184 WARN L194 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:34:48,562 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:34:49,053 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:34:49,632 WARN L194 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:34:50,015 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:34:50,453 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:34:50,964 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:34:51,315 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:34:54,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:34:54,955 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2020-11-07 00:34:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 00:34:54,960 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-11-07 00:34:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:34:54,961 INFO L225 Difference]: With dead ends: 110 [2020-11-07 00:34:54,961 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 00:34:54,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=514, Invalid=4888, Unknown=0, NotChecked=0, Total=5402 [2020-11-07 00:34:54,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 00:34:55,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2020-11-07 00:34:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-07 00:34:55,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2020-11-07 00:34:55,013 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 175 [2020-11-07 00:34:55,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:34:55,013 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2020-11-07 00:34:55,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 00:34:55,013 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2020-11-07 00:34:55,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 00:34:55,014 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:34:55,014 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:34:55,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-11-07 00:34:55,015 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:34:55,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:34:55,015 INFO L82 PathProgramCache]: Analyzing trace with hash -558382087, now seen corresponding path program 66 times [2020-11-07 00:34:55,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:34:55,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520181599] [2020-11-07 00:34:55,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:34:55,017 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:34:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:55,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:34:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:55,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:34:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:55,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:55,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 00:34:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:55,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:55,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:56,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:56,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:56,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:56,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:57,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:57,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:57,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:58,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:34:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:34:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 52 proven. 41 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-11-07 00:34:58,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520181599] [2020-11-07 00:34:58,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:34:58,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-11-07 00:34:58,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975691050] [2020-11-07 00:34:58,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 00:34:58,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:34:58,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 00:34:58,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 00:34:58,622 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand 37 states. [2020-11-07 00:35:01,047 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-11-07 00:35:01,493 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 00:35:01,832 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-07 00:35:04,222 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 00:35:05,247 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 00:35:13,379 WARN L194 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 00:35:13,647 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-11-07 00:35:13,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:35:13,653 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2020-11-07 00:35:13,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 00:35:13,653 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-11-07 00:35:13,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:35:13,654 INFO L225 Difference]: With dead ends: 115 [2020-11-07 00:35:13,654 INFO L226 Difference]: Without dead ends: 108 [2020-11-07 00:35:13,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=610, Invalid=5552, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 00:35:13,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-07 00:35:13,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2020-11-07 00:35:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 00:35:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-11-07 00:35:13,692 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 155 [2020-11-07 00:35:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:35:13,692 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-11-07 00:35:13,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 00:35:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-11-07 00:35:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 00:35:13,693 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:35:13,693 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:35:13,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-11-07 00:35:13,694 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:35:13,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:35:13,694 INFO L82 PathProgramCache]: Analyzing trace with hash -789275676, now seen corresponding path program 67 times [2020-11-07 00:35:13,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:35:13,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344066467] [2020-11-07 00:35:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:35:13,696 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:35:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:13,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:35:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:13,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:35:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:14,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:14,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:14,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 00:35:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:14,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:15,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:15,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:15,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:15,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:16,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:16,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:16,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:17,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:17,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 54 proven. 70 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-11-07 00:35:18,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344066467] [2020-11-07 00:35:18,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:35:18,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-11-07 00:35:18,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598964392] [2020-11-07 00:35:18,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 00:35:18,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:35:18,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 00:35:18,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 00:35:18,023 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 39 states. [2020-11-07 00:35:20,635 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:35:21,068 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:35:21,413 WARN L194 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:35:21,858 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:35:22,460 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:35:22,884 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:35:25,627 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:35:26,754 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:35:27,891 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:35:29,085 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:35:31,339 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:35:32,504 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:35:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:35:35,712 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-11-07 00:35:35,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 00:35:35,718 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-11-07 00:35:35,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:35:35,719 INFO L225 Difference]: With dead ends: 119 [2020-11-07 00:35:35,719 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 00:35:35,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=619, Invalid=5861, Unknown=0, NotChecked=0, Total=6480 [2020-11-07 00:35:35,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 00:35:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-11-07 00:35:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 00:35:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-11-07 00:35:35,759 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 165 [2020-11-07 00:35:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:35:35,759 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-11-07 00:35:35,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 00:35:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-11-07 00:35:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 00:35:35,760 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:35:35,760 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:35:35,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-11-07 00:35:35,760 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:35:35,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:35:35,761 INFO L82 PathProgramCache]: Analyzing trace with hash -838607975, now seen corresponding path program 68 times [2020-11-07 00:35:35,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:35:35,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628997116] [2020-11-07 00:35:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:35:35,763 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:35:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:36,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:35:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:36,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:35:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:36,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:36,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:36,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:37,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 00:35:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:37,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:37,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:37,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:38,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:38,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:38,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:39,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:39,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:39,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:40,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:35:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:35:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 58 proven. 81 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-11-07 00:35:40,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628997116] [2020-11-07 00:35:40,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:35:40,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-11-07 00:35:40,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619419016] [2020-11-07 00:35:40,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 00:35:40,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:35:40,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 00:35:40,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 00:35:40,603 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 41 states. [2020-11-07 00:35:43,809 WARN L194 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:35:44,359 WARN L194 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:35:44,771 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:35:45,411 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:35:46,127 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:35:46,660 WARN L194 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:35:47,376 WARN L194 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:35:47,955 WARN L194 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:35:48,388 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:35:49,826 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 00:35:51,468 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:35:52,766 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:35:55,118 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:35:56,407 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:35:57,662 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:36:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:36:01,337 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-11-07 00:36:01,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 00:36:01,343 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-11-07 00:36:01,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:36:01,345 INFO L225 Difference]: With dead ends: 119 [2020-11-07 00:36:01,345 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 00:36:01,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=628, Invalid=6178, Unknown=0, NotChecked=0, Total=6806 [2020-11-07 00:36:01,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 00:36:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-11-07 00:36:01,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 00:36:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-11-07 00:36:01,394 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 175 [2020-11-07 00:36:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:36:01,395 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-11-07 00:36:01,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 00:36:01,395 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-11-07 00:36:01,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-11-07 00:36:01,395 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:36:01,396 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:36:01,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-11-07 00:36:01,396 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:36:01,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:36:01,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1140911676, now seen corresponding path program 69 times [2020-11-07 00:36:01,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:36:01,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975065443] [2020-11-07 00:36:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:36:01,398 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:36:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:01,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:36:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:01,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:36:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:01,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:02,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:02,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:02,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:03,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 00:36:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:03,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:03,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:04,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:04,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:04,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:05,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:05,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:06,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:06,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:07,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 62 proven. 92 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-11-07 00:36:07,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975065443] [2020-11-07 00:36:07,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:36:07,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-11-07 00:36:07,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154929393] [2020-11-07 00:36:07,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 00:36:07,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:36:07,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 00:36:07,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 00:36:07,509 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 43 states. [2020-11-07 00:36:10,654 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:36:11,245 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:36:11,684 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:36:12,259 WARN L194 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:36:13,006 WARN L194 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:36:13,528 WARN L194 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:36:14,221 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:36:14,874 WARN L194 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:36:15,323 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:36:15,910 WARN L194 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:36:16,585 WARN L194 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:36:17,060 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:36:18,298 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 00:36:20,159 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:36:21,522 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:36:22,883 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:36:24,232 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:36:25,621 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:36:26,648 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 00:36:27,069 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 00:36:28,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:36:28,336 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-11-07 00:36:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 00:36:28,342 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 185 [2020-11-07 00:36:28,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:36:28,344 INFO L225 Difference]: With dead ends: 119 [2020-11-07 00:36:28,344 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 00:36:28,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=637, Invalid=6503, Unknown=0, NotChecked=0, Total=7140 [2020-11-07 00:36:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 00:36:28,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-11-07 00:36:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 00:36:28,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-11-07 00:36:28,391 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 185 [2020-11-07 00:36:28,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:36:28,391 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-11-07 00:36:28,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 00:36:28,392 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-11-07 00:36:28,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-11-07 00:36:28,393 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:36:28,393 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:36:28,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-11-07 00:36:28,393 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:36:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:36:28,394 INFO L82 PathProgramCache]: Analyzing trace with hash 763558713, now seen corresponding path program 70 times [2020-11-07 00:36:28,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:36:28,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092988788] [2020-11-07 00:36:28,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:36:28,396 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:36:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:28,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:36:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:28,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:36:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:28,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:29,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:29,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:29,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:30,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:30,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:36:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:30,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:31,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:31,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:31,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:32,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:32,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:33,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:33,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:34,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:34,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:36:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:36:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 66 proven. 103 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-11-07 00:36:35,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092988788] [2020-11-07 00:36:35,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:36:35,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-11-07 00:36:35,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623796206] [2020-11-07 00:36:35,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 00:36:35,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:36:35,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 00:36:35,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1866, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 00:36:35,365 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 45 states. [2020-11-07 00:36:38,991 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:36:39,635 WARN L194 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:36:40,105 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:36:40,823 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 00:36:41,675 WARN L194 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:36:42,254 WARN L194 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:36:43,068 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:36:43,724 WARN L194 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:36:44,215 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:36:44,950 WARN L194 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:36:45,595 WARN L194 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:36:46,086 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:36:46,838 WARN L194 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:36:47,532 WARN L194 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:36:48,031 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:36:49,676 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 00:36:51,526 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:36:52,521 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:36:53,039 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:36:54,029 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:36:54,569 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:36:55,568 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:36:56,097 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:36:59,225 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 00:36:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:36:59,811 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-11-07 00:36:59,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 00:36:59,818 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 195 [2020-11-07 00:36:59,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:36:59,820 INFO L225 Difference]: With dead ends: 119 [2020-11-07 00:36:59,820 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 00:36:59,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=646, Invalid=6836, Unknown=0, NotChecked=0, Total=7482 [2020-11-07 00:36:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 00:36:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-11-07 00:36:59,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 00:36:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-11-07 00:36:59,870 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 195 [2020-11-07 00:36:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:36:59,874 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-11-07 00:36:59,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 00:36:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-11-07 00:36:59,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-11-07 00:36:59,876 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:36:59,876 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:36:59,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-11-07 00:36:59,876 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:36:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:36:59,884 INFO L82 PathProgramCache]: Analyzing trace with hash -826818652, now seen corresponding path program 71 times [2020-11-07 00:36:59,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:36:59,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063826959] [2020-11-07 00:36:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:36:59,886 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:36:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:00,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:37:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:00,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:37:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:00,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:00,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:00,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:00,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:01,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:01,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:01,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:02,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:37:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:02,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:04,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:04,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:04,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:05,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:05,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:06,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:06,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:07,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:07,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 70 proven. 114 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2020-11-07 00:37:08,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063826959] [2020-11-07 00:37:08,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:37:08,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-11-07 00:37:08,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332936321] [2020-11-07 00:37:08,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-07 00:37:08,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:37:08,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-07 00:37:08,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2043, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 00:37:08,395 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 47 states. [2020-11-07 00:37:12,228 WARN L194 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:37:12,874 WARN L194 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:37:13,375 WARN L194 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:37:14,126 WARN L194 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:37:15,007 WARN L194 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:37:15,593 WARN L194 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:16,428 WARN L194 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:17,076 WARN L194 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:37:17,585 WARN L194 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:18,326 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:18,981 WARN L194 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:37:19,481 WARN L194 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:20,256 WARN L194 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:20,916 WARN L194 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:37:21,434 WARN L194 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:22,205 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:22,858 WARN L194 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:37:23,364 WARN L194 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:37:25,116 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 00:37:25,776 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:37:26,534 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:37:27,100 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:37:27,505 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:37:28,194 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:37:28,764 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:37:29,161 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:37:29,815 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:37:30,346 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:37:30,743 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:37:33,955 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 00:37:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:37:34,236 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-11-07 00:37:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 00:37:34,236 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 205 [2020-11-07 00:37:34,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:37:34,237 INFO L225 Difference]: With dead ends: 119 [2020-11-07 00:37:34,237 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 00:37:34,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=655, Invalid=7177, Unknown=0, NotChecked=0, Total=7832 [2020-11-07 00:37:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 00:37:34,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-11-07 00:37:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 00:37:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-11-07 00:37:34,300 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 205 [2020-11-07 00:37:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:37:34,301 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-11-07 00:37:34,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-07 00:37:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-11-07 00:37:34,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-11-07 00:37:34,302 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:37:34,302 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:37:34,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-11-07 00:37:34,302 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:37:34,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:37:34,303 INFO L82 PathProgramCache]: Analyzing trace with hash 744694489, now seen corresponding path program 72 times [2020-11-07 00:37:34,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:37:34,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284338665] [2020-11-07 00:37:34,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:37:34,305 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:37:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:34,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:37:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:34,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:37:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:34,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:35,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:35,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:35,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:35,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:36,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:36,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:37,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 00:37:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:37,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:38,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:38,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:39,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:39,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:40,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:40,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:41,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:41,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:42,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:37:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:37:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 74 proven. 125 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-11-07 00:37:43,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284338665] [2020-11-07 00:37:43,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:37:43,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-11-07 00:37:43,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748150020] [2020-11-07 00:37:43,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-07 00:37:43,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:37:43,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-07 00:37:43,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2228, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 00:37:43,054 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 49 states. [2020-11-07 00:37:46,565 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 00:37:47,280 WARN L194 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:37:48,010 WARN L194 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:37:48,555 WARN L194 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:37:49,280 WARN L194 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:37:50,242 WARN L194 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:37:50,917 WARN L194 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:51,826 WARN L194 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:52,677 WARN L194 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:37:53,225 WARN L194 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:53,937 WARN L194 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:54,775 WARN L194 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:37:55,330 WARN L194 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:56,053 WARN L194 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:56,929 WARN L194 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:37:57,490 WARN L194 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:58,181 WARN L194 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:37:59,004 WARN L194 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:37:59,554 WARN L194 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:38:00,265 WARN L194 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:38:01,148 WARN L194 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:38:01,701 WARN L194 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:38:02,278 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 00:38:03,293 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 00:38:04,031 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:05,040 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:05,781 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:38:06,215 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:06,835 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:07,598 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:38:08,037 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:11,656 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 00:38:11,973 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 00:38:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:38:12,098 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2020-11-07 00:38:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 00:38:12,106 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 215 [2020-11-07 00:38:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:38:12,108 INFO L225 Difference]: With dead ends: 115 [2020-11-07 00:38:12,108 INFO L226 Difference]: Without dead ends: 108 [2020-11-07 00:38:12,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=664, Invalid=7526, Unknown=0, NotChecked=0, Total=8190 [2020-11-07 00:38:12,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-07 00:38:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2020-11-07 00:38:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-07 00:38:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 122 transitions. [2020-11-07 00:38:12,147 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 122 transitions. Word has length 215 [2020-11-07 00:38:12,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:38:12,147 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 122 transitions. [2020-11-07 00:38:12,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-07 00:38:12,147 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 122 transitions. [2020-11-07 00:38:12,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 00:38:12,148 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:38:12,148 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:38:12,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-11-07 00:38:12,148 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:38:12,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:38:12,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1119135524, now seen corresponding path program 73 times [2020-11-07 00:38:12,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:38:12,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738438125] [2020-11-07 00:38:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:38:12,150 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:38:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:12,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:38:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:12,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:38:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:12,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:12,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:13,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:13,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:13,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:14,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:14,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:15,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:15,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-11-07 00:38:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:16,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:16,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:17,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:17,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-11-07 00:38:17,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738438125] [2020-11-07 00:38:17,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:38:17,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-11-07 00:38:17,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939713768] [2020-11-07 00:38:17,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 00:38:17,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:38:17,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 00:38:17,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 00:38:17,823 INFO L87 Difference]: Start difference. First operand 99 states and 122 transitions. Second operand 39 states. [2020-11-07 00:38:20,709 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 00:38:21,300 WARN L194 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:38:21,900 WARN L194 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 00:38:22,365 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:38:23,046 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 00:38:23,826 WARN L194 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:38:24,389 WARN L194 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:38:25,153 WARN L194 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:38:25,758 WARN L194 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:38:26,240 WARN L194 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:38:26,962 WARN L194 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:38:27,584 WARN L194 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:38:28,064 WARN L194 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:38:28,639 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 00:38:29,129 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 00:38:29,484 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:30,069 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:30,555 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:38:30,908 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:31,487 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:31,992 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:38:32,351 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:32,939 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:33,454 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:38:33,820 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:34,678 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-11-07 00:38:35,997 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 00:38:36,460 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 00:38:36,734 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 00:38:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:38:38,093 INFO L93 Difference]: Finished difference Result 115 states and 148 transitions. [2020-11-07 00:38:38,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 00:38:38,101 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-11-07 00:38:38,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:38:38,102 INFO L225 Difference]: With dead ends: 115 [2020-11-07 00:38:38,102 INFO L226 Difference]: Without dead ends: 108 [2020-11-07 00:38:38,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=543, Invalid=5007, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 00:38:38,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-07 00:38:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2020-11-07 00:38:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 00:38:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2020-11-07 00:38:38,145 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 165 [2020-11-07 00:38:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:38:38,145 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2020-11-07 00:38:38,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 00:38:38,145 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2020-11-07 00:38:38,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 00:38:38,146 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:38:38,146 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:38:38,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-11-07 00:38:38,146 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:38:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:38:38,147 INFO L82 PathProgramCache]: Analyzing trace with hash -991195900, now seen corresponding path program 74 times [2020-11-07 00:38:38,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:38:38,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898959498] [2020-11-07 00:38:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:38:38,148 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:38:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:38,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:38:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:38,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:38:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:38,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:38,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:39,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:39,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:39,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:40,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:40,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:41,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:41,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-11-07 00:38:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:42,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:42,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:38:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:38:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 36 proven. 68 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-07 00:38:42,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898959498] [2020-11-07 00:38:42,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:38:42,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-11-07 00:38:42,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333301700] [2020-11-07 00:38:42,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 00:38:42,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:38:42,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 00:38:42,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 00:38:42,920 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand 35 states. [2020-11-07 00:38:45,653 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 00:38:46,208 WARN L194 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:38:46,823 WARN L194 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:38:47,281 WARN L194 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:38:47,957 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:38:48,706 WARN L194 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 00:38:49,272 WARN L194 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:38:49,899 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 00:38:50,341 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 00:38:50,669 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:51,208 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:51,675 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:38:51,996 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:52,540 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:53,002 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:38:53,335 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:53,882 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:54,328 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:38:54,656 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:55,215 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:55,661 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:38:55,995 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:56,534 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 00:38:56,915 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 00:39:00,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:39:00,391 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2020-11-07 00:39:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 00:39:00,398 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-11-07 00:39:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:39:00,399 INFO L225 Difference]: With dead ends: 115 [2020-11-07 00:39:00,399 INFO L226 Difference]: Without dead ends: 108 [2020-11-07 00:39:00,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=525, Invalid=4445, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 00:39:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-07 00:39:00,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2020-11-07 00:39:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 00:39:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2020-11-07 00:39:00,443 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 145 [2020-11-07 00:39:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:39:00,443 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2020-11-07 00:39:00,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 00:39:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2020-11-07 00:39:00,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 00:39:00,444 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:39:00,445 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:39:00,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-11-07 00:39:00,445 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:39:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:39:00,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1795469391, now seen corresponding path program 75 times [2020-11-07 00:39:00,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:39:00,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122644798] [2020-11-07 00:39:00,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:39:00,448 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:39:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:00,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:39:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:00,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:39:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:00,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:39:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:01,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:39:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:01,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:39:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:01,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:39:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:01,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:39:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:01,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:39:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:02,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:39:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:02,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:39:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:03,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-11-07 00:39:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:03,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:39:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:03,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:39:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:04,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:39:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:04,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:39:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:05,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:39:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:39:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 51 proven. 98 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-11-07 00:39:05,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122644798] [2020-11-07 00:39:05,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:39:05,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-11-07 00:39:05,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293660621] [2020-11-07 00:39:05,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 00:39:05,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:39:05,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 00:39:05,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 00:39:05,466 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand 41 states. [2020-11-07 00:39:08,047 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 00:39:08,670 WARN L194 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 00:39:09,263 WARN L194 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 00:39:09,679 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 00:39:10,199 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 00:39:10,912 WARN L194 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 00:39:11,416 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:39:12,095 WARN L194 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:39:12,743 WARN L194 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:39:13,160 WARN L194 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:39:13,714 WARN L194 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:39:14,379 WARN L194 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 00:39:14,813 WARN L194 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:39:15,349 WARN L194 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 00:39:15,990 WARN L194 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 00:39:16,433 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 00:39:17,410 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 00:39:17,763 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49