/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:25:06,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:25:06,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:25:06,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:25:06,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:25:06,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:25:06,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:25:06,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:25:06,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:25:06,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:25:06,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:25:06,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:25:06,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:25:06,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:25:06,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:25:06,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:25:06,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:25:06,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:25:06,735 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:25:06,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:25:06,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:25:06,741 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:25:06,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:25:06,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:25:06,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:25:06,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:25:06,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:25:06,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:25:06,744 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:25:06,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:25:06,744 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:25:06,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:25:06,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:25:06,746 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:25:06,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:25:06,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:25:06,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:25:06,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:25:06,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:25:06,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:25:06,748 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:25:07,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:25:07,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:25:07,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:25:07,264 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:25:07,265 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:25:07,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-10-24 02:25:07,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/500b6f7df/a70eccca99c84a559710f3aadce218c4/FLAGb6b5e7805 [2020-10-24 02:25:08,041 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:25:08,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-10-24 02:25:08,049 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/500b6f7df/a70eccca99c84a559710f3aadce218c4/FLAGb6b5e7805 [2020-10-24 02:25:08,386 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/500b6f7df/a70eccca99c84a559710f3aadce218c4 [2020-10-24 02:25:08,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:25:08,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:25:08,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:25:08,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:25:08,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:25:08,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4894a538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08, skipping insertion in model container [2020-10-24 02:25:08,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:25:08,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:25:08,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:25:08,654 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:25:08,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:25:08,694 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:25:08,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08 WrapperNode [2020-10-24 02:25:08,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:25:08,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:25:08,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:25:08,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:25:08,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,734 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... [2020-10-24 02:25:08,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:25:08,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:25:08,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:25:08,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:25:08,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:25:08,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:25:08,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:25:08,836 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:25:08,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:25:08,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:25:08,836 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:25:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:25:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 02:25:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 02:25:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:25:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:25:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:25:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:25:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:25:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:25:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:25:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:25:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:25:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:25:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:25:09,182 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:25:09,182 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-24 02:25:09,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:25:09 BoogieIcfgContainer [2020-10-24 02:25:09,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:25:09,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:25:09,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:25:09,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:25:09,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:25:08" (1/3) ... [2020-10-24 02:25:09,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13026c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:25:09, skipping insertion in model container [2020-10-24 02:25:09,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:08" (2/3) ... [2020-10-24 02:25:09,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13026c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:25:09, skipping insertion in model container [2020-10-24 02:25:09,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:25:09" (3/3) ... [2020-10-24 02:25:09,196 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-10-24 02:25:09,210 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:25:09,215 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:25:09,231 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:25:09,269 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:25:09,269 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:25:09,270 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:25:09,270 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:25:09,270 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:25:09,270 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:25:09,270 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:25:09,271 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:25:09,291 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-10-24 02:25:09,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-24 02:25:09,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:09,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:09,304 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:09,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:09,312 INFO L82 PathProgramCache]: Analyzing trace with hash -234938568, now seen corresponding path program 1 times [2020-10-24 02:25:09,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:09,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740947533] [2020-10-24 02:25:09,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:09,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:09,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740947533] [2020-10-24 02:25:09,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:25:09,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:25:09,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869870882] [2020-10-24 02:25:09,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:25:09,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:09,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:25:09,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:25:09,754 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2020-10-24 02:25:09,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:09,966 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-10-24 02:25:09,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:25:09,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-24 02:25:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:09,978 INFO L225 Difference]: With dead ends: 73 [2020-10-24 02:25:09,978 INFO L226 Difference]: Without dead ends: 37 [2020-10-24 02:25:09,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:25:10,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-24 02:25:10,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-24 02:25:10,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-24 02:25:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-24 02:25:10,033 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 23 [2020-10-24 02:25:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:10,034 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-24 02:25:10,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:25:10,034 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-24 02:25:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-24 02:25:10,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:10,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:10,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:25:10,036 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:10,038 INFO L82 PathProgramCache]: Analyzing trace with hash 872969255, now seen corresponding path program 1 times [2020-10-24 02:25:10,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:10,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864626819] [2020-10-24 02:25:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:10,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864626819] [2020-10-24 02:25:10,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:25:10,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:25:10,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409409597] [2020-10-24 02:25:10,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:25:10,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:10,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:25:10,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:25:10,176 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2020-10-24 02:25:10,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:10,420 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-10-24 02:25:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:25:10,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-24 02:25:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:10,426 INFO L225 Difference]: With dead ends: 67 [2020-10-24 02:25:10,426 INFO L226 Difference]: Without dead ends: 51 [2020-10-24 02:25:10,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:25:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-24 02:25:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2020-10-24 02:25:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-24 02:25:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-24 02:25:10,456 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 25 [2020-10-24 02:25:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:10,457 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-24 02:25:10,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:25:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-24 02:25:10,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-24 02:25:10,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:10,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:10,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:25:10,459 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:10,460 INFO L82 PathProgramCache]: Analyzing trace with hash -568340233, now seen corresponding path program 1 times [2020-10-24 02:25:10,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:10,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110590292] [2020-10-24 02:25:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:10,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110590292] [2020-10-24 02:25:10,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:10,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:25:10,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049706736] [2020-10-24 02:25:10,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:25:10,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:10,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:25:10,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:25:10,588 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 6 states. [2020-10-24 02:25:10,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:10,722 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-10-24 02:25:10,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:25:10,722 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-24 02:25:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:10,724 INFO L225 Difference]: With dead ends: 78 [2020-10-24 02:25:10,724 INFO L226 Difference]: Without dead ends: 58 [2020-10-24 02:25:10,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:25:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-24 02:25:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-10-24 02:25:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-24 02:25:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-24 02:25:10,736 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 32 [2020-10-24 02:25:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:10,737 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-24 02:25:10,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:25:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-24 02:25:10,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-24 02:25:10,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:10,738 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:10,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:25:10,739 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:10,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:10,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1329424935, now seen corresponding path program 2 times [2020-10-24 02:25:10,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:10,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696758075] [2020-10-24 02:25:10,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:25:10,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696758075] [2020-10-24 02:25:10,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:25:10,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 02:25:10,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446683423] [2020-10-24 02:25:10,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:25:10,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:10,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:25:10,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:25:10,857 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 6 states. [2020-10-24 02:25:11,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:11,039 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-24 02:25:11,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:25:11,039 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-24 02:25:11,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:11,042 INFO L225 Difference]: With dead ends: 57 [2020-10-24 02:25:11,042 INFO L226 Difference]: Without dead ends: 49 [2020-10-24 02:25:11,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:25:11,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-24 02:25:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-24 02:25:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-24 02:25:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-24 02:25:11,061 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 39 [2020-10-24 02:25:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:11,062 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-24 02:25:11,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:25:11,062 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-24 02:25:11,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-24 02:25:11,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:11,066 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 02:25:11,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:25:11,067 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:11,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:11,067 INFO L82 PathProgramCache]: Analyzing trace with hash 821039234, now seen corresponding path program 1 times [2020-10-24 02:25:11,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:11,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067887702] [2020-10-24 02:25:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:11,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:25:11,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067887702] [2020-10-24 02:25:11,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:11,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:25:11,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70563931] [2020-10-24 02:25:11,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:25:11,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:11,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:25:11,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:25:11,234 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 8 states. [2020-10-24 02:25:11,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:11,555 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2020-10-24 02:25:11,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 02:25:11,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-24 02:25:11,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:11,557 INFO L225 Difference]: With dead ends: 69 [2020-10-24 02:25:11,557 INFO L226 Difference]: Without dead ends: 58 [2020-10-24 02:25:11,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:25:11,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-24 02:25:11,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-10-24 02:25:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-24 02:25:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-24 02:25:11,578 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 46 [2020-10-24 02:25:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:11,580 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-24 02:25:11,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:25:11,581 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-24 02:25:11,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-24 02:25:11,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:11,585 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:11,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:25:11,588 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:11,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1394712007, now seen corresponding path program 2 times [2020-10-24 02:25:11,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:11,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135441472] [2020-10-24 02:25:11,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:11,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:11,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135441472] [2020-10-24 02:25:11,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:11,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:25:11,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285065748] [2020-10-24 02:25:11,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:25:11,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:11,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:25:11,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:25:11,765 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 8 states. [2020-10-24 02:25:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:11,953 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-10-24 02:25:11,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 02:25:11,953 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-24 02:25:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:11,955 INFO L225 Difference]: With dead ends: 95 [2020-10-24 02:25:11,955 INFO L226 Difference]: Without dead ends: 68 [2020-10-24 02:25:11,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:25:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-24 02:25:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2020-10-24 02:25:11,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-24 02:25:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-24 02:25:11,966 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 53 [2020-10-24 02:25:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:11,967 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-24 02:25:11,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:25:11,967 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-24 02:25:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-24 02:25:11,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:11,968 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:11,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:25:11,969 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:11,969 INFO L82 PathProgramCache]: Analyzing trace with hash -876567913, now seen corresponding path program 3 times [2020-10-24 02:25:11,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:11,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644434742] [2020-10-24 02:25:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:12,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644434742] [2020-10-24 02:25:12,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:12,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:25:12,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396997694] [2020-10-24 02:25:12,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:25:12,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:12,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:25:12,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:25:12,129 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 10 states. [2020-10-24 02:25:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:12,363 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-10-24 02:25:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:25:12,364 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-24 02:25:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:12,365 INFO L225 Difference]: With dead ends: 102 [2020-10-24 02:25:12,365 INFO L226 Difference]: Without dead ends: 75 [2020-10-24 02:25:12,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:25:12,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-24 02:25:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-10-24 02:25:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-24 02:25:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-24 02:25:12,376 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 60 [2020-10-24 02:25:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:12,377 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-24 02:25:12,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:25:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-24 02:25:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-24 02:25:12,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:12,378 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:12,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:25:12,378 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:12,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:12,379 INFO L82 PathProgramCache]: Analyzing trace with hash 501846983, now seen corresponding path program 4 times [2020-10-24 02:25:12,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:12,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296594305] [2020-10-24 02:25:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:12,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296594305] [2020-10-24 02:25:12,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:12,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:25:12,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935587868] [2020-10-24 02:25:12,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:25:12,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:12,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:25:12,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:25:12,532 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 12 states. [2020-10-24 02:25:12,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:12,828 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2020-10-24 02:25:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:25:12,829 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-24 02:25:12,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:12,830 INFO L225 Difference]: With dead ends: 109 [2020-10-24 02:25:12,830 INFO L226 Difference]: Without dead ends: 82 [2020-10-24 02:25:12,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:25:12,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-24 02:25:12,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2020-10-24 02:25:12,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-24 02:25:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-24 02:25:12,842 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 67 [2020-10-24 02:25:12,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:12,843 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-24 02:25:12,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:25:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-24 02:25:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-24 02:25:12,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:12,844 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:12,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:25:12,845 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash 70773911, now seen corresponding path program 5 times [2020-10-24 02:25:12,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:12,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415435944] [2020-10-24 02:25:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:13,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:13,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415435944] [2020-10-24 02:25:13,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:13,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-24 02:25:13,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029643544] [2020-10-24 02:25:13,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 02:25:13,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:13,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 02:25:13,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:25:13,059 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 14 states. [2020-10-24 02:25:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:13,405 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2020-10-24 02:25:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 02:25:13,405 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-10-24 02:25:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:13,407 INFO L225 Difference]: With dead ends: 116 [2020-10-24 02:25:13,407 INFO L226 Difference]: Without dead ends: 89 [2020-10-24 02:25:13,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-24 02:25:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-24 02:25:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2020-10-24 02:25:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-24 02:25:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-24 02:25:13,420 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 74 [2020-10-24 02:25:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:13,421 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-24 02:25:13,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 02:25:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-24 02:25:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-24 02:25:13,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:13,422 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:13,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:25:13,423 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:13,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:13,424 INFO L82 PathProgramCache]: Analyzing trace with hash -661976633, now seen corresponding path program 6 times [2020-10-24 02:25:13,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:13,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10999858] [2020-10-24 02:25:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:13,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:13,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10999858] [2020-10-24 02:25:13,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:13,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:25:13,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748095018] [2020-10-24 02:25:13,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:25:13,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:13,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:25:13,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:25:13,727 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 16 states. [2020-10-24 02:25:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:14,171 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2020-10-24 02:25:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-24 02:25:14,174 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2020-10-24 02:25:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:14,176 INFO L225 Difference]: With dead ends: 123 [2020-10-24 02:25:14,176 INFO L226 Difference]: Without dead ends: 96 [2020-10-24 02:25:14,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:25:14,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-24 02:25:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-10-24 02:25:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-24 02:25:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-24 02:25:14,188 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 81 [2020-10-24 02:25:14,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:14,189 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-24 02:25:14,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:25:14,189 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-24 02:25:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-24 02:25:14,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:14,191 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:14,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:25:14,191 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:14,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:14,191 INFO L82 PathProgramCache]: Analyzing trace with hash 220575383, now seen corresponding path program 7 times [2020-10-24 02:25:14,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:14,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862662483] [2020-10-24 02:25:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:14,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:14,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862662483] [2020-10-24 02:25:14,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:14,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:25:14,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043711532] [2020-10-24 02:25:14,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:25:14,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:14,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:25:14,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:25:14,447 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 18 states. [2020-10-24 02:25:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:14,923 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2020-10-24 02:25:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 02:25:14,923 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 88 [2020-10-24 02:25:14,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:14,924 INFO L225 Difference]: With dead ends: 130 [2020-10-24 02:25:14,925 INFO L226 Difference]: Without dead ends: 103 [2020-10-24 02:25:14,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-10-24 02:25:14,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-24 02:25:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-10-24 02:25:14,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-24 02:25:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-24 02:25:14,939 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 88 [2020-10-24 02:25:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:14,939 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-24 02:25:14,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:25:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-24 02:25:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-24 02:25:14,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:14,941 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:14,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:25:14,941 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:14,942 INFO L82 PathProgramCache]: Analyzing trace with hash 140902343, now seen corresponding path program 8 times [2020-10-24 02:25:14,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:14,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025347102] [2020-10-24 02:25:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:15,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:15,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025347102] [2020-10-24 02:25:15,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:15,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-24 02:25:15,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330447547] [2020-10-24 02:25:15,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 02:25:15,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:15,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 02:25:15,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:25:15,235 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 20 states. [2020-10-24 02:25:15,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:15,768 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2020-10-24 02:25:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-24 02:25:15,768 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2020-10-24 02:25:15,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:15,769 INFO L225 Difference]: With dead ends: 137 [2020-10-24 02:25:15,770 INFO L226 Difference]: Without dead ends: 110 [2020-10-24 02:25:15,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 02:25:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-24 02:25:15,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2020-10-24 02:25:15,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-24 02:25:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-10-24 02:25:15,784 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2020-10-24 02:25:15,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:15,785 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-10-24 02:25:15,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 02:25:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-10-24 02:25:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-24 02:25:15,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:15,787 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:15,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:25:15,787 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:15,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:15,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1792409449, now seen corresponding path program 9 times [2020-10-24 02:25:15,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:15,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859590488] [2020-10-24 02:25:15,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:16,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:16,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859590488] [2020-10-24 02:25:16,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:16,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 02:25:16,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247376891] [2020-10-24 02:25:16,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 02:25:16,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:16,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 02:25:16,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-24 02:25:16,149 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 22 states. [2020-10-24 02:25:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:16,712 INFO L93 Difference]: Finished difference Result 144 states and 148 transitions. [2020-10-24 02:25:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-24 02:25:16,713 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2020-10-24 02:25:16,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:16,714 INFO L225 Difference]: With dead ends: 144 [2020-10-24 02:25:16,714 INFO L226 Difference]: Without dead ends: 117 [2020-10-24 02:25:16,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:25:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-24 02:25:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-10-24 02:25:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-24 02:25:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-24 02:25:16,730 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 102 [2020-10-24 02:25:16,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:16,731 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-24 02:25:16,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 02:25:16,731 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-24 02:25:16,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-24 02:25:16,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:16,736 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:16,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 02:25:16,736 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:16,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1255830983, now seen corresponding path program 10 times [2020-10-24 02:25:16,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:16,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170573807] [2020-10-24 02:25:16,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:17,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:17,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170573807] [2020-10-24 02:25:17,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:17,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-24 02:25:17,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600454226] [2020-10-24 02:25:17,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-24 02:25:17,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:17,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-24 02:25:17,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-10-24 02:25:17,300 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 24 states. [2020-10-24 02:25:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:18,012 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2020-10-24 02:25:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-24 02:25:18,013 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 109 [2020-10-24 02:25:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:18,014 INFO L225 Difference]: With dead ends: 151 [2020-10-24 02:25:18,014 INFO L226 Difference]: Without dead ends: 124 [2020-10-24 02:25:18,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 02:25:18,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-24 02:25:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2020-10-24 02:25:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-24 02:25:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-10-24 02:25:18,031 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 109 [2020-10-24 02:25:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:18,032 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-10-24 02:25:18,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-24 02:25:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-10-24 02:25:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-24 02:25:18,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:18,034 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:18,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 02:25:18,034 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:18,035 INFO L82 PathProgramCache]: Analyzing trace with hash 853854871, now seen corresponding path program 11 times [2020-10-24 02:25:18,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:18,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832885562] [2020-10-24 02:25:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:18,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:18,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832885562] [2020-10-24 02:25:18,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:18,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-24 02:25:18,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954313811] [2020-10-24 02:25:18,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-24 02:25:18,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:18,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-24 02:25:18,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-10-24 02:25:18,459 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 26 states. [2020-10-24 02:25:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:19,258 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-10-24 02:25:19,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-24 02:25:19,259 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 116 [2020-10-24 02:25:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:19,261 INFO L225 Difference]: With dead ends: 158 [2020-10-24 02:25:19,261 INFO L226 Difference]: Without dead ends: 131 [2020-10-24 02:25:19,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-10-24 02:25:19,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-24 02:25:19,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2020-10-24 02:25:19,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-24 02:25:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-24 02:25:19,284 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 116 [2020-10-24 02:25:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:19,285 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-24 02:25:19,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-24 02:25:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-24 02:25:19,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-24 02:25:19,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:19,286 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:19,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 02:25:19,288 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:19,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1430809543, now seen corresponding path program 12 times [2020-10-24 02:25:19,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:19,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852461846] [2020-10-24 02:25:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:19,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:19,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852461846] [2020-10-24 02:25:19,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:19,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-24 02:25:19,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16179401] [2020-10-24 02:25:19,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 02:25:19,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:19,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 02:25:19,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:25:19,870 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 28 states. [2020-10-24 02:25:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:20,774 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2020-10-24 02:25:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-24 02:25:20,774 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 123 [2020-10-24 02:25:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:20,776 INFO L225 Difference]: With dead ends: 165 [2020-10-24 02:25:20,776 INFO L226 Difference]: Without dead ends: 138 [2020-10-24 02:25:20,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-10-24 02:25:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-24 02:25:20,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2020-10-24 02:25:20,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-24 02:25:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2020-10-24 02:25:20,793 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 123 [2020-10-24 02:25:20,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:20,794 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2020-10-24 02:25:20,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 02:25:20,794 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2020-10-24 02:25:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-24 02:25:20,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:20,796 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:20,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 02:25:20,796 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:20,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1693848727, now seen corresponding path program 13 times [2020-10-24 02:25:20,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:20,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648677441] [2020-10-24 02:25:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:21,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:21,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648677441] [2020-10-24 02:25:21,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:21,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-24 02:25:21,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605860751] [2020-10-24 02:25:21,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-24 02:25:21,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:21,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-24 02:25:21,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:25:21,365 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 30 states. [2020-10-24 02:25:22,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:22,418 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2020-10-24 02:25:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-24 02:25:22,421 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 130 [2020-10-24 02:25:22,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:22,422 INFO L225 Difference]: With dead ends: 172 [2020-10-24 02:25:22,423 INFO L226 Difference]: Without dead ends: 145 [2020-10-24 02:25:22,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 02:25:22,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-24 02:25:22,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-10-24 02:25:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-24 02:25:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2020-10-24 02:25:22,439 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 130 [2020-10-24 02:25:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:22,440 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2020-10-24 02:25:22,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-24 02:25:22,440 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2020-10-24 02:25:22,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-24 02:25:22,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:22,442 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:22,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 02:25:22,442 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:22,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:22,443 INFO L82 PathProgramCache]: Analyzing trace with hash -183508537, now seen corresponding path program 14 times [2020-10-24 02:25:22,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:22,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548648986] [2020-10-24 02:25:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:23,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:23,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548648986] [2020-10-24 02:25:23,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:23,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-24 02:25:23,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9204746] [2020-10-24 02:25:23,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-24 02:25:23,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:23,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-24 02:25:23,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-10-24 02:25:23,055 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 32 states. [2020-10-24 02:25:24,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:24,235 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2020-10-24 02:25:24,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-24 02:25:24,235 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 137 [2020-10-24 02:25:24,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:24,237 INFO L225 Difference]: With dead ends: 179 [2020-10-24 02:25:24,237 INFO L226 Difference]: Without dead ends: 152 [2020-10-24 02:25:24,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 02:25:24,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-24 02:25:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-10-24 02:25:24,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-24 02:25:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2020-10-24 02:25:24,255 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 137 [2020-10-24 02:25:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:24,256 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2020-10-24 02:25:24,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-24 02:25:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2020-10-24 02:25:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-24 02:25:24,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:24,258 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:24,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 02:25:24,258 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:24,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:24,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1845633385, now seen corresponding path program 15 times [2020-10-24 02:25:24,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:24,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433378563] [2020-10-24 02:25:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:24,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:24,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433378563] [2020-10-24 02:25:24,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:24,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-24 02:25:24,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576681090] [2020-10-24 02:25:24,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-24 02:25:24,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:24,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-24 02:25:24,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 02:25:24,914 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 34 states. [2020-10-24 02:25:26,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:26,167 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2020-10-24 02:25:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-24 02:25:26,169 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 144 [2020-10-24 02:25:26,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:26,171 INFO L225 Difference]: With dead ends: 186 [2020-10-24 02:25:26,171 INFO L226 Difference]: Without dead ends: 159 [2020-10-24 02:25:26,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-10-24 02:25:26,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-24 02:25:26,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2020-10-24 02:25:26,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-24 02:25:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-10-24 02:25:26,192 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 144 [2020-10-24 02:25:26,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:26,192 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-10-24 02:25:26,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-24 02:25:26,192 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-10-24 02:25:26,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-24 02:25:26,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:26,194 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:26,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 02:25:26,195 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:26,195 INFO L82 PathProgramCache]: Analyzing trace with hash 261150663, now seen corresponding path program 16 times [2020-10-24 02:25:26,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:26,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528213617] [2020-10-24 02:25:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:26,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:26,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528213617] [2020-10-24 02:25:26,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:26,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-24 02:25:26,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289973202] [2020-10-24 02:25:26,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-24 02:25:26,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:26,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-24 02:25:26,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 02:25:26,959 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 36 states. [2020-10-24 02:25:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:28,350 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2020-10-24 02:25:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-24 02:25:28,351 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 151 [2020-10-24 02:25:28,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:28,353 INFO L225 Difference]: With dead ends: 193 [2020-10-24 02:25:28,353 INFO L226 Difference]: Without dead ends: 166 [2020-10-24 02:25:28,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-10-24 02:25:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-24 02:25:28,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2020-10-24 02:25:28,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-24 02:25:28,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2020-10-24 02:25:28,372 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 151 [2020-10-24 02:25:28,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:28,372 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2020-10-24 02:25:28,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-24 02:25:28,372 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2020-10-24 02:25:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-24 02:25:28,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:28,375 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:28,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 02:25:28,375 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:28,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:28,375 INFO L82 PathProgramCache]: Analyzing trace with hash 144451735, now seen corresponding path program 17 times [2020-10-24 02:25:28,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:28,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334957900] [2020-10-24 02:25:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:29,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:29,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334957900] [2020-10-24 02:25:29,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:29,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-24 02:25:29,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467431208] [2020-10-24 02:25:29,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-24 02:25:29,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:29,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-24 02:25:29,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 02:25:29,243 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 38 states. [2020-10-24 02:25:30,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:30,790 INFO L93 Difference]: Finished difference Result 200 states and 204 transitions. [2020-10-24 02:25:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-24 02:25:30,791 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 158 [2020-10-24 02:25:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:30,793 INFO L225 Difference]: With dead ends: 200 [2020-10-24 02:25:30,793 INFO L226 Difference]: Without dead ends: 173 [2020-10-24 02:25:30,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-10-24 02:25:30,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-24 02:25:30,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2020-10-24 02:25:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-24 02:25:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-10-24 02:25:30,818 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 158 [2020-10-24 02:25:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:30,818 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-10-24 02:25:30,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-24 02:25:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-10-24 02:25:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-24 02:25:30,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:30,821 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:30,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-24 02:25:30,821 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1574220345, now seen corresponding path program 18 times [2020-10-24 02:25:30,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:30,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057001508] [2020-10-24 02:25:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:31,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:31,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057001508] [2020-10-24 02:25:31,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:31,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-24 02:25:31,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426813682] [2020-10-24 02:25:31,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-24 02:25:31,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:31,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-24 02:25:31,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:25:31,741 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 40 states. [2020-10-24 02:25:33,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:33,444 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2020-10-24 02:25:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-24 02:25:33,444 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 165 [2020-10-24 02:25:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:33,446 INFO L225 Difference]: With dead ends: 207 [2020-10-24 02:25:33,446 INFO L226 Difference]: Without dead ends: 180 [2020-10-24 02:25:33,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-10-24 02:25:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-24 02:25:33,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2020-10-24 02:25:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-24 02:25:33,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2020-10-24 02:25:33,468 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 165 [2020-10-24 02:25:33,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:33,469 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2020-10-24 02:25:33,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-24 02:25:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2020-10-24 02:25:33,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-24 02:25:33,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:33,470 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:33,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-24 02:25:33,471 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:33,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:33,471 INFO L82 PathProgramCache]: Analyzing trace with hash -9375081, now seen corresponding path program 19 times [2020-10-24 02:25:33,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:33,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800321288] [2020-10-24 02:25:33,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:34,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:34,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800321288] [2020-10-24 02:25:34,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:34,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-24 02:25:34,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761319828] [2020-10-24 02:25:34,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-24 02:25:34,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:34,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-24 02:25:34,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-10-24 02:25:34,536 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 42 states. [2020-10-24 02:25:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:36,288 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2020-10-24 02:25:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-24 02:25:36,289 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 172 [2020-10-24 02:25:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:36,291 INFO L225 Difference]: With dead ends: 214 [2020-10-24 02:25:36,291 INFO L226 Difference]: Without dead ends: 187 [2020-10-24 02:25:36,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-10-24 02:25:36,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-24 02:25:36,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2020-10-24 02:25:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-24 02:25:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2020-10-24 02:25:36,315 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 172 [2020-10-24 02:25:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:36,315 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2020-10-24 02:25:36,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-24 02:25:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2020-10-24 02:25:36,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-24 02:25:36,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:36,317 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:36,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-24 02:25:36,317 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:36,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:36,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1036041273, now seen corresponding path program 20 times [2020-10-24 02:25:36,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:36,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836126176] [2020-10-24 02:25:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:37,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 1350 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:37,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836126176] [2020-10-24 02:25:37,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:37,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-24 02:25:37,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022072608] [2020-10-24 02:25:37,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-24 02:25:37,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:37,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-24 02:25:37,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 02:25:37,401 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 44 states. [2020-10-24 02:25:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:39,222 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2020-10-24 02:25:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-24 02:25:39,222 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 179 [2020-10-24 02:25:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:39,224 INFO L225 Difference]: With dead ends: 221 [2020-10-24 02:25:39,225 INFO L226 Difference]: Without dead ends: 194 [2020-10-24 02:25:39,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-10-24 02:25:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-24 02:25:39,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 189. [2020-10-24 02:25:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-24 02:25:39,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2020-10-24 02:25:39,250 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 179 [2020-10-24 02:25:39,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:39,250 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2020-10-24 02:25:39,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-24 02:25:39,251 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2020-10-24 02:25:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-24 02:25:39,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:39,252 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:39,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-24 02:25:39,252 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:39,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:39,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1793311593, now seen corresponding path program 21 times [2020-10-24 02:25:39,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:39,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951071844] [2020-10-24 02:25:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:40,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1491 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:40,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951071844] [2020-10-24 02:25:40,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:40,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-24 02:25:40,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809045603] [2020-10-24 02:25:40,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-24 02:25:40,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:40,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-24 02:25:40,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 02:25:40,427 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 46 states. [2020-10-24 02:25:42,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:42,327 INFO L93 Difference]: Finished difference Result 228 states and 232 transitions. [2020-10-24 02:25:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-24 02:25:42,328 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 186 [2020-10-24 02:25:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:42,329 INFO L225 Difference]: With dead ends: 228 [2020-10-24 02:25:42,329 INFO L226 Difference]: Without dead ends: 201 [2020-10-24 02:25:42,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-10-24 02:25:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-24 02:25:42,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 196. [2020-10-24 02:25:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-24 02:25:42,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2020-10-24 02:25:42,354 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 186 [2020-10-24 02:25:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:42,354 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2020-10-24 02:25:42,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-24 02:25:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2020-10-24 02:25:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-24 02:25:42,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:42,356 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:42,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-24 02:25:42,356 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:42,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:42,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1658013241, now seen corresponding path program 22 times [2020-10-24 02:25:42,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:42,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626986106] [2020-10-24 02:25:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:43,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1639 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:43,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626986106] [2020-10-24 02:25:43,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:43,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-24 02:25:43,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759832333] [2020-10-24 02:25:43,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-24 02:25:43,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:43,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-24 02:25:43,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-10-24 02:25:43,726 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 48 states. [2020-10-24 02:25:45,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:45,961 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2020-10-24 02:25:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-24 02:25:45,962 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 193 [2020-10-24 02:25:45,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:45,964 INFO L225 Difference]: With dead ends: 235 [2020-10-24 02:25:45,964 INFO L226 Difference]: Without dead ends: 208 [2020-10-24 02:25:45,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-10-24 02:25:45,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-24 02:25:45,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2020-10-24 02:25:45,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-24 02:25:45,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2020-10-24 02:25:45,990 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 193 [2020-10-24 02:25:45,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:45,990 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2020-10-24 02:25:45,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-24 02:25:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2020-10-24 02:25:45,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-24 02:25:45,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:45,992 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:45,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-24 02:25:45,992 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:45,993 INFO L82 PathProgramCache]: Analyzing trace with hash -801241449, now seen corresponding path program 23 times [2020-10-24 02:25:45,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:45,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080933354] [2020-10-24 02:25:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:47,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 1794 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:47,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080933354] [2020-10-24 02:25:47,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:47,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-24 02:25:47,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972231898] [2020-10-24 02:25:47,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-24 02:25:47,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:47,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-24 02:25:47,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-10-24 02:25:47,385 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 50 states. [2020-10-24 02:25:49,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:49,830 INFO L93 Difference]: Finished difference Result 242 states and 246 transitions. [2020-10-24 02:25:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-24 02:25:49,831 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 200 [2020-10-24 02:25:49,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:49,833 INFO L225 Difference]: With dead ends: 242 [2020-10-24 02:25:49,833 INFO L226 Difference]: Without dead ends: 215 [2020-10-24 02:25:49,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-10-24 02:25:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-24 02:25:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2020-10-24 02:25:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-24 02:25:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2020-10-24 02:25:49,862 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 200 [2020-10-24 02:25:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:49,863 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2020-10-24 02:25:49,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-24 02:25:49,863 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2020-10-24 02:25:49,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-24 02:25:49,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:49,864 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:49,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-24 02:25:49,864 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:49,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2018750407, now seen corresponding path program 24 times [2020-10-24 02:25:49,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:49,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211217993] [2020-10-24 02:25:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:51,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1967 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:51,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211217993] [2020-10-24 02:25:51,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:51,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-24 02:25:51,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582657407] [2020-10-24 02:25:51,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-24 02:25:51,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:51,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-24 02:25:51,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-10-24 02:25:51,418 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 52 states. [2020-10-24 02:25:54,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:54,014 INFO L93 Difference]: Finished difference Result 249 states and 253 transitions. [2020-10-24 02:25:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-24 02:25:54,014 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 207 [2020-10-24 02:25:54,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:54,017 INFO L225 Difference]: With dead ends: 249 [2020-10-24 02:25:54,017 INFO L226 Difference]: Without dead ends: 222 [2020-10-24 02:25:54,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-10-24 02:25:54,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-24 02:25:54,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2020-10-24 02:25:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-24 02:25:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2020-10-24 02:25:54,047 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 207 [2020-10-24 02:25:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:54,047 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2020-10-24 02:25:54,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-24 02:25:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2020-10-24 02:25:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-24 02:25:54,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:54,049 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:54,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-24 02:25:54,049 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1619636073, now seen corresponding path program 25 times [2020-10-24 02:25:54,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:54,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555558858] [2020-10-24 02:25:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:55,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 0 proven. 2125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:25:55,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555558858] [2020-10-24 02:25:55,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:55,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-24 02:25:55,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111964277] [2020-10-24 02:25:55,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-24 02:25:55,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:55,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-24 02:25:55,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-10-24 02:25:55,724 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 54 states. [2020-10-24 02:25:58,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:58,336 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2020-10-24 02:25:58,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-24 02:25:58,337 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 214 [2020-10-24 02:25:58,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:58,339 INFO L225 Difference]: With dead ends: 256 [2020-10-24 02:25:58,339 INFO L226 Difference]: Without dead ends: 229 [2020-10-24 02:25:58,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-10-24 02:25:58,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-24 02:25:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 224. [2020-10-24 02:25:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-24 02:25:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2020-10-24 02:25:58,381 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 214 [2020-10-24 02:25:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:58,382 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2020-10-24 02:25:58,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-24 02:25:58,382 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2020-10-24 02:25:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-24 02:25:58,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:58,383 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:58,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-24 02:25:58,384 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:58,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:58,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1324079673, now seen corresponding path program 26 times [2020-10-24 02:25:58,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:58,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26758435] [2020-10-24 02:25:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:00,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:26:00,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26758435] [2020-10-24 02:26:00,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:00,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-24 02:26:00,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379786859] [2020-10-24 02:26:00,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-24 02:26:00,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:00,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-24 02:26:00,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 02:26:00,187 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand 56 states. [2020-10-24 02:26:03,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:03,311 INFO L93 Difference]: Finished difference Result 263 states and 267 transitions. [2020-10-24 02:26:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-24 02:26:03,312 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 221 [2020-10-24 02:26:03,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:03,314 INFO L225 Difference]: With dead ends: 263 [2020-10-24 02:26:03,315 INFO L226 Difference]: Without dead ends: 236 [2020-10-24 02:26:03,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-10-24 02:26:03,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-24 02:26:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 231. [2020-10-24 02:26:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-24 02:26:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2020-10-24 02:26:03,349 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 221 [2020-10-24 02:26:03,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:03,349 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2020-10-24 02:26:03,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-24 02:26:03,350 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2020-10-24 02:26:03,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-24 02:26:03,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:03,351 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:03,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-24 02:26:03,352 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:03,352 INFO L82 PathProgramCache]: Analyzing trace with hash -647685481, now seen corresponding path program 27 times [2020-10-24 02:26:03,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:03,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498122560] [2020-10-24 02:26:03,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:05,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2495 backedges. 0 proven. 2484 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:26:05,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498122560] [2020-10-24 02:26:05,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:05,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-24 02:26:05,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369089976] [2020-10-24 02:26:05,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-24 02:26:05,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:05,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-24 02:26:05,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-10-24 02:26:05,257 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 58 states. [2020-10-24 02:26:08,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:08,560 INFO L93 Difference]: Finished difference Result 270 states and 274 transitions. [2020-10-24 02:26:08,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-24 02:26:08,560 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 228 [2020-10-24 02:26:08,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:08,563 INFO L225 Difference]: With dead ends: 270 [2020-10-24 02:26:08,563 INFO L226 Difference]: Without dead ends: 243 [2020-10-24 02:26:08,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-10-24 02:26:08,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-24 02:26:08,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 238. [2020-10-24 02:26:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-24 02:26:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 240 transitions. [2020-10-24 02:26:08,594 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 240 transitions. Word has length 228 [2020-10-24 02:26:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:08,595 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 240 transitions. [2020-10-24 02:26:08,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-24 02:26:08,595 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 240 transitions. [2020-10-24 02:26:08,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-24 02:26:08,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:08,596 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:08,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-24 02:26:08,597 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:08,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:08,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1127343161, now seen corresponding path program 28 times [2020-10-24 02:26:08,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:08,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125012574] [2020-10-24 02:26:08,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:10,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2685 backedges. 0 proven. 2674 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:26:10,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125012574] [2020-10-24 02:26:10,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:10,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-24 02:26:10,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564829388] [2020-10-24 02:26:10,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-24 02:26:10,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:10,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-24 02:26:10,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 02:26:10,707 INFO L87 Difference]: Start difference. First operand 238 states and 240 transitions. Second operand 60 states. [2020-10-24 02:26:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:14,064 INFO L93 Difference]: Finished difference Result 277 states and 281 transitions. [2020-10-24 02:26:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-24 02:26:14,064 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 235 [2020-10-24 02:26:14,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:14,067 INFO L225 Difference]: With dead ends: 277 [2020-10-24 02:26:14,067 INFO L226 Difference]: Without dead ends: 250 [2020-10-24 02:26:14,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-10-24 02:26:14,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-24 02:26:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 245. [2020-10-24 02:26:14,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-24 02:26:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2020-10-24 02:26:14,107 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 235 [2020-10-24 02:26:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:14,108 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2020-10-24 02:26:14,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-24 02:26:14,108 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2020-10-24 02:26:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-24 02:26:14,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:14,110 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:14,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-24 02:26:14,110 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:14,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:14,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1017799831, now seen corresponding path program 29 times [2020-10-24 02:26:14,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:14,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137321500] [2020-10-24 02:26:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:16,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2871 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:26:16,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137321500] [2020-10-24 02:26:16,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:16,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-24 02:26:16,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53434993] [2020-10-24 02:26:16,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-24 02:26:16,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:16,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-24 02:26:16,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-10-24 02:26:16,374 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 62 states. [2020-10-24 02:26:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:20,160 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2020-10-24 02:26:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-24 02:26:20,161 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2020-10-24 02:26:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:20,163 INFO L225 Difference]: With dead ends: 284 [2020-10-24 02:26:20,163 INFO L226 Difference]: Without dead ends: 257 [2020-10-24 02:26:20,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-10-24 02:26:20,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-24 02:26:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 252. [2020-10-24 02:26:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-24 02:26:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 254 transitions. [2020-10-24 02:26:20,206 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 254 transitions. Word has length 242 [2020-10-24 02:26:20,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:20,206 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 254 transitions. [2020-10-24 02:26:20,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-24 02:26:20,206 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 254 transitions. [2020-10-24 02:26:20,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-24 02:26:20,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:20,208 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:20,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-24 02:26:20,208 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:20,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:20,209 INFO L82 PathProgramCache]: Analyzing trace with hash 685871559, now seen corresponding path program 30 times [2020-10-24 02:26:20,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:20,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107660871] [2020-10-24 02:26:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:22,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3086 backedges. 0 proven. 3075 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:26:22,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107660871] [2020-10-24 02:26:22,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:22,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-24 02:26:22,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235483823] [2020-10-24 02:26:22,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-24 02:26:22,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:22,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-24 02:26:22,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-10-24 02:26:22,544 INFO L87 Difference]: Start difference. First operand 252 states and 254 transitions. Second operand 64 states. [2020-10-24 02:26:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:26,693 INFO L93 Difference]: Finished difference Result 291 states and 295 transitions. [2020-10-24 02:26:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-10-24 02:26:26,694 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 249 [2020-10-24 02:26:26,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:26,696 INFO L225 Difference]: With dead ends: 291 [2020-10-24 02:26:26,696 INFO L226 Difference]: Without dead ends: 264 [2020-10-24 02:26:26,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-10-24 02:26:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-24 02:26:26,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 259. [2020-10-24 02:26:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-24 02:26:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2020-10-24 02:26:26,740 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 249 [2020-10-24 02:26:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:26,740 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2020-10-24 02:26:26,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-24 02:26:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2020-10-24 02:26:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-24 02:26:26,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:26,742 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:26,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-24 02:26:26,742 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:26,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:26,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1877356183, now seen corresponding path program 31 times [2020-10-24 02:26:26,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:26,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408805743] [2020-10-24 02:26:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:29,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3297 backedges. 0 proven. 3286 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:26:29,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408805743] [2020-10-24 02:26:29,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:29,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-24 02:26:29,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504334329] [2020-10-24 02:26:29,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-24 02:26:29,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:29,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-24 02:26:29,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-10-24 02:26:29,300 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand 66 states. [2020-10-24 02:26:33,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:33,679 INFO L93 Difference]: Finished difference Result 298 states and 302 transitions. [2020-10-24 02:26:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-10-24 02:26:33,680 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 256 [2020-10-24 02:26:33,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:33,682 INFO L225 Difference]: With dead ends: 298 [2020-10-24 02:26:33,682 INFO L226 Difference]: Without dead ends: 271 [2020-10-24 02:26:33,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-10-24 02:26:33,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-24 02:26:33,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 266. [2020-10-24 02:26:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-24 02:26:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 268 transitions. [2020-10-24 02:26:33,729 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 268 transitions. Word has length 256 [2020-10-24 02:26:33,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:33,730 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 268 transitions. [2020-10-24 02:26:33,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-24 02:26:33,730 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 268 transitions. [2020-10-24 02:26:33,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-24 02:26:33,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:33,732 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:33,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-24 02:26:33,732 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:33,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:33,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1699838009, now seen corresponding path program 32 times [2020-10-24 02:26:33,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:33,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663585035] [2020-10-24 02:26:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:36,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 0 proven. 3504 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:26:36,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663585035] [2020-10-24 02:26:36,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:36,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-24 02:26:36,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873427942] [2020-10-24 02:26:36,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-24 02:26:36,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:36,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-24 02:26:36,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-10-24 02:26:36,562 INFO L87 Difference]: Start difference. First operand 266 states and 268 transitions. Second operand 68 states. [2020-10-24 02:26:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:40,868 INFO L93 Difference]: Finished difference Result 305 states and 309 transitions. [2020-10-24 02:26:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-10-24 02:26:40,869 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 263 [2020-10-24 02:26:40,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:40,872 INFO L225 Difference]: With dead ends: 305 [2020-10-24 02:26:40,872 INFO L226 Difference]: Without dead ends: 278 [2020-10-24 02:26:40,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-10-24 02:26:40,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-24 02:26:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 273. [2020-10-24 02:26:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-24 02:26:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2020-10-24 02:26:40,927 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 263 [2020-10-24 02:26:40,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:40,927 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2020-10-24 02:26:40,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-24 02:26:40,927 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2020-10-24 02:26:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-24 02:26:40,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:40,929 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:40,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-24 02:26:40,929 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:40,930 INFO L82 PathProgramCache]: Analyzing trace with hash 28866711, now seen corresponding path program 33 times [2020-10-24 02:26:40,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:40,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476556133] [2020-10-24 02:26:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:43,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3740 backedges. 0 proven. 3729 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:26:43,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476556133] [2020-10-24 02:26:43,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:43,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-24 02:26:43,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655741598] [2020-10-24 02:26:43,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-24 02:26:43,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:43,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-24 02:26:43,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-10-24 02:26:43,940 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand 70 states. [2020-10-24 02:26:48,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:48,907 INFO L93 Difference]: Finished difference Result 312 states and 316 transitions. [2020-10-24 02:26:48,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-10-24 02:26:48,908 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 270 [2020-10-24 02:26:48,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:48,910 INFO L225 Difference]: With dead ends: 312 [2020-10-24 02:26:48,910 INFO L226 Difference]: Without dead ends: 285 [2020-10-24 02:26:48,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-10-24 02:26:48,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-24 02:26:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 280. [2020-10-24 02:26:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-24 02:26:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2020-10-24 02:26:48,964 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 270 [2020-10-24 02:26:48,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:48,965 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2020-10-24 02:26:48,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-24 02:26:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2020-10-24 02:26:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-24 02:26:48,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:48,967 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:48,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-24 02:26:48,967 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:48,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:48,967 INFO L82 PathProgramCache]: Analyzing trace with hash -812319289, now seen corresponding path program 34 times [2020-10-24 02:26:48,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:48,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313726024] [2020-10-24 02:26:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:52,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 0 proven. 3961 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:26:52,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313726024] [2020-10-24 02:26:52,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:52,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-24 02:26:52,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43934377] [2020-10-24 02:26:52,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-24 02:26:52,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:52,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-24 02:26:52,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-10-24 02:26:52,136 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand 72 states. [2020-10-24 02:26:57,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:57,451 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2020-10-24 02:26:57,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-24 02:26:57,452 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 277 [2020-10-24 02:26:57,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:57,454 INFO L225 Difference]: With dead ends: 319 [2020-10-24 02:26:57,454 INFO L226 Difference]: Without dead ends: 292 [2020-10-24 02:26:57,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-10-24 02:26:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-24 02:26:57,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 287. [2020-10-24 02:26:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-24 02:26:57,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 289 transitions. [2020-10-24 02:26:57,499 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 289 transitions. Word has length 277 [2020-10-24 02:26:57,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:57,499 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 289 transitions. [2020-10-24 02:26:57,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-24 02:26:57,499 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 289 transitions. [2020-10-24 02:26:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-10-24 02:26:57,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:57,501 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:26:57,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-24 02:26:57,501 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:57,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:57,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1757495959, now seen corresponding path program 35 times [2020-10-24 02:26:57,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:57,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229167261] [2020-10-24 02:26:57,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:00,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4211 backedges. 0 proven. 4200 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:27:01,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229167261] [2020-10-24 02:27:01,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:01,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-24 02:27:01,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801534095] [2020-10-24 02:27:01,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-24 02:27:01,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:01,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-24 02:27:01,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-10-24 02:27:01,007 INFO L87 Difference]: Start difference. First operand 287 states and 289 transitions. Second operand 74 states. [2020-10-24 02:27:06,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:06,698 INFO L93 Difference]: Finished difference Result 326 states and 330 transitions. [2020-10-24 02:27:06,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-10-24 02:27:06,699 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 284 [2020-10-24 02:27:06,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:06,701 INFO L225 Difference]: With dead ends: 326 [2020-10-24 02:27:06,701 INFO L226 Difference]: Without dead ends: 299 [2020-10-24 02:27:06,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-10-24 02:27:06,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-24 02:27:06,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 294. [2020-10-24 02:27:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-24 02:27:06,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 296 transitions. [2020-10-24 02:27:06,763 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 296 transitions. Word has length 284 [2020-10-24 02:27:06,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:06,763 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 296 transitions. [2020-10-24 02:27:06,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-24 02:27:06,764 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 296 transitions. [2020-10-24 02:27:06,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-24 02:27:06,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:06,766 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:27:06,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-24 02:27:06,766 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:06,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:06,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1661668409, now seen corresponding path program 36 times [2020-10-24 02:27:06,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:06,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805908549] [2020-10-24 02:27:06,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:10,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4457 backedges. 0 proven. 4446 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:27:10,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805908549] [2020-10-24 02:27:10,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:10,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-24 02:27:10,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086097520] [2020-10-24 02:27:10,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-24 02:27:10,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:10,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-24 02:27:10,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-10-24 02:27:10,369 INFO L87 Difference]: Start difference. First operand 294 states and 296 transitions. Second operand 76 states. [2020-10-24 02:27:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:16,189 INFO L93 Difference]: Finished difference Result 333 states and 337 transitions. [2020-10-24 02:27:16,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-10-24 02:27:16,190 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 291 [2020-10-24 02:27:16,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:16,193 INFO L225 Difference]: With dead ends: 333 [2020-10-24 02:27:16,193 INFO L226 Difference]: Without dead ends: 306 [2020-10-24 02:27:16,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-10-24 02:27:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-24 02:27:16,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2020-10-24 02:27:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-24 02:27:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 303 transitions. [2020-10-24 02:27:16,260 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 303 transitions. Word has length 291 [2020-10-24 02:27:16,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:16,260 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 303 transitions. [2020-10-24 02:27:16,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-24 02:27:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 303 transitions. [2020-10-24 02:27:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-24 02:27:16,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:16,263 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:27:16,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-24 02:27:16,263 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:16,263 INFO L82 PathProgramCache]: Analyzing trace with hash 60853399, now seen corresponding path program 37 times [2020-10-24 02:27:16,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:16,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461071461] [2020-10-24 02:27:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:20,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4699 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:27:20,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461071461] [2020-10-24 02:27:20,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:20,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-24 02:27:20,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872087656] [2020-10-24 02:27:20,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-24 02:27:20,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:20,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-24 02:27:20,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-10-24 02:27:20,144 INFO L87 Difference]: Start difference. First operand 301 states and 303 transitions. Second operand 78 states. [2020-10-24 02:27:26,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:26,122 INFO L93 Difference]: Finished difference Result 340 states and 344 transitions. [2020-10-24 02:27:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-10-24 02:27:26,123 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 298 [2020-10-24 02:27:26,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:26,126 INFO L225 Difference]: With dead ends: 340 [2020-10-24 02:27:26,126 INFO L226 Difference]: Without dead ends: 313 [2020-10-24 02:27:26,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-10-24 02:27:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-24 02:27:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 308. [2020-10-24 02:27:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-24 02:27:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 310 transitions. [2020-10-24 02:27:26,187 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 310 transitions. Word has length 298 [2020-10-24 02:27:26,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:26,188 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 310 transitions. [2020-10-24 02:27:26,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-24 02:27:26,188 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 310 transitions. [2020-10-24 02:27:26,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-24 02:27:26,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:26,190 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:27:26,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-24 02:27:26,190 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:26,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:26,191 INFO L82 PathProgramCache]: Analyzing trace with hash -265393721, now seen corresponding path program 38 times [2020-10-24 02:27:26,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:26,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463225844] [2020-10-24 02:27:26,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:30,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4959 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:27:30,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463225844] [2020-10-24 02:27:30,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:30,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-24 02:27:30,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554589820] [2020-10-24 02:27:30,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-24 02:27:30,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:30,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-24 02:27:30,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-10-24 02:27:30,339 INFO L87 Difference]: Start difference. First operand 308 states and 310 transitions. Second operand 80 states. [2020-10-24 02:27:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:36,708 INFO L93 Difference]: Finished difference Result 347 states and 351 transitions. [2020-10-24 02:27:36,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-10-24 02:27:36,709 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 305 [2020-10-24 02:27:36,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:36,711 INFO L225 Difference]: With dead ends: 347 [2020-10-24 02:27:36,712 INFO L226 Difference]: Without dead ends: 320 [2020-10-24 02:27:36,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-10-24 02:27:36,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-24 02:27:36,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 315. [2020-10-24 02:27:36,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-24 02:27:36,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 317 transitions. [2020-10-24 02:27:36,763 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 317 transitions. Word has length 305 [2020-10-24 02:27:36,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:36,763 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 317 transitions. [2020-10-24 02:27:36,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-24 02:27:36,764 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 317 transitions. [2020-10-24 02:27:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-24 02:27:36,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:36,766 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:27:36,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-24 02:27:36,766 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:36,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:36,767 INFO L82 PathProgramCache]: Analyzing trace with hash 418797207, now seen corresponding path program 39 times [2020-10-24 02:27:36,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:36,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547172944] [2020-10-24 02:27:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:41,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5237 backedges. 0 proven. 5226 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:27:41,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547172944] [2020-10-24 02:27:41,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:41,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-24 02:27:41,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932147872] [2020-10-24 02:27:41,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-24 02:27:41,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:41,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-24 02:27:41,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-10-24 02:27:41,389 INFO L87 Difference]: Start difference. First operand 315 states and 317 transitions. Second operand 82 states. [2020-10-24 02:27:48,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:48,576 INFO L93 Difference]: Finished difference Result 354 states and 358 transitions. [2020-10-24 02:27:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-10-24 02:27:48,577 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 312 [2020-10-24 02:27:48,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:48,579 INFO L225 Difference]: With dead ends: 354 [2020-10-24 02:27:48,579 INFO L226 Difference]: Without dead ends: 327 [2020-10-24 02:27:48,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-10-24 02:27:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-24 02:27:48,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 322. [2020-10-24 02:27:48,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-24 02:27:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 324 transitions. [2020-10-24 02:27:48,647 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 324 transitions. Word has length 312 [2020-10-24 02:27:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:48,648 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 324 transitions. [2020-10-24 02:27:48,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-24 02:27:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 324 transitions. [2020-10-24 02:27:48,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-24 02:27:48,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:48,650 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:27:48,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-24 02:27:48,650 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:48,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:48,651 INFO L82 PathProgramCache]: Analyzing trace with hash -828284985, now seen corresponding path program 40 times [2020-10-24 02:27:48,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:48,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407449086] [2020-10-24 02:27:48,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:53,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5511 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:27:53,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407449086] [2020-10-24 02:27:53,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:53,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-24 02:27:53,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899631403] [2020-10-24 02:27:53,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-24 02:27:53,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:53,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-24 02:27:53,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-10-24 02:27:53,485 INFO L87 Difference]: Start difference. First operand 322 states and 324 transitions. Second operand 84 states. [2020-10-24 02:28:01,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:01,677 INFO L93 Difference]: Finished difference Result 361 states and 365 transitions. [2020-10-24 02:28:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-10-24 02:28:01,678 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 319 [2020-10-24 02:28:01,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:01,681 INFO L225 Difference]: With dead ends: 361 [2020-10-24 02:28:01,681 INFO L226 Difference]: Without dead ends: 334 [2020-10-24 02:28:01,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-10-24 02:28:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-24 02:28:01,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 329. [2020-10-24 02:28:01,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-24 02:28:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 331 transitions. [2020-10-24 02:28:01,773 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 331 transitions. Word has length 319 [2020-10-24 02:28:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:01,773 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 331 transitions. [2020-10-24 02:28:01,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-24 02:28:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 331 transitions. [2020-10-24 02:28:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-24 02:28:01,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:01,776 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:01,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-24 02:28:01,777 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:01,777 INFO L82 PathProgramCache]: Analyzing trace with hash -681402217, now seen corresponding path program 41 times [2020-10-24 02:28:01,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:01,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025141439] [2020-10-24 02:28:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:07,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5792 backedges. 0 proven. 5781 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:28:07,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025141439] [2020-10-24 02:28:07,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:07,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-24 02:28:07,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418159519] [2020-10-24 02:28:07,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-24 02:28:07,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:07,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-24 02:28:07,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-10-24 02:28:07,152 INFO L87 Difference]: Start difference. First operand 329 states and 331 transitions. Second operand 86 states. [2020-10-24 02:28:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:15,949 INFO L93 Difference]: Finished difference Result 368 states and 372 transitions. [2020-10-24 02:28:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-10-24 02:28:15,950 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 326 [2020-10-24 02:28:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:15,953 INFO L225 Difference]: With dead ends: 368 [2020-10-24 02:28:15,953 INFO L226 Difference]: Without dead ends: 341 [2020-10-24 02:28:15,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-10-24 02:28:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-24 02:28:16,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 336. [2020-10-24 02:28:16,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-24 02:28:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 338 transitions. [2020-10-24 02:28:16,046 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 338 transitions. Word has length 326 [2020-10-24 02:28:16,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:16,046 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 338 transitions. [2020-10-24 02:28:16,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-24 02:28:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 338 transitions. [2020-10-24 02:28:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-24 02:28:16,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:16,049 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:16,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-24 02:28:16,049 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:16,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1437455815, now seen corresponding path program 42 times [2020-10-24 02:28:16,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:16,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794689948] [2020-10-24 02:28:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:21,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6080 backedges. 0 proven. 6069 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:28:21,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794689948] [2020-10-24 02:28:21,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:21,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-24 02:28:21,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341742699] [2020-10-24 02:28:21,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-24 02:28:21,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:21,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-24 02:28:21,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-10-24 02:28:21,707 INFO L87 Difference]: Start difference. First operand 336 states and 338 transitions. Second operand 88 states. [2020-10-24 02:28:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:31,446 INFO L93 Difference]: Finished difference Result 375 states and 379 transitions. [2020-10-24 02:28:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-10-24 02:28:31,452 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 333 [2020-10-24 02:28:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:31,454 INFO L225 Difference]: With dead ends: 375 [2020-10-24 02:28:31,454 INFO L226 Difference]: Without dead ends: 348 [2020-10-24 02:28:31,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-10-24 02:28:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-24 02:28:31,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 343. [2020-10-24 02:28:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-24 02:28:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 345 transitions. [2020-10-24 02:28:31,553 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 345 transitions. Word has length 333 [2020-10-24 02:28:31,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:31,553 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 345 transitions. [2020-10-24 02:28:31,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-24 02:28:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 345 transitions. [2020-10-24 02:28:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-10-24 02:28:31,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:31,556 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:31,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-24 02:28:31,557 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:31,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:31,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1434806935, now seen corresponding path program 43 times [2020-10-24 02:28:31,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:31,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259487574] [2020-10-24 02:28:31,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:37,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 0 proven. 6364 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:28:37,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259487574] [2020-10-24 02:28:37,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:37,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-10-24 02:28:37,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145723468] [2020-10-24 02:28:37,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-10-24 02:28:37,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:37,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-10-24 02:28:37,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-10-24 02:28:37,890 INFO L87 Difference]: Start difference. First operand 343 states and 345 transitions. Second operand 90 states. [2020-10-24 02:28:48,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:48,501 INFO L93 Difference]: Finished difference Result 382 states and 386 transitions. [2020-10-24 02:28:48,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-10-24 02:28:48,502 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 340 [2020-10-24 02:28:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:48,504 INFO L225 Difference]: With dead ends: 382 [2020-10-24 02:28:48,505 INFO L226 Difference]: Without dead ends: 355 [2020-10-24 02:28:48,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-10-24 02:28:48,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-24 02:28:48,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 350. [2020-10-24 02:28:48,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-24 02:28:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 352 transitions. [2020-10-24 02:28:48,589 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 352 transitions. Word has length 340 [2020-10-24 02:28:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:48,589 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 352 transitions. [2020-10-24 02:28:48,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-10-24 02:28:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 352 transitions. [2020-10-24 02:28:48,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-10-24 02:28:48,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:48,592 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:48,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-24 02:28:48,592 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:48,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1162622009, now seen corresponding path program 44 times [2020-10-24 02:28:48,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:48,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254244335] [2020-10-24 02:28:48,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:55,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6677 backedges. 0 proven. 6666 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:28:55,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254244335] [2020-10-24 02:28:55,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:55,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-10-24 02:28:55,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946470038] [2020-10-24 02:28:55,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-10-24 02:28:55,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:55,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-10-24 02:28:55,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-10-24 02:28:55,724 INFO L87 Difference]: Start difference. First operand 350 states and 352 transitions. Second operand 92 states. [2020-10-24 02:29:07,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:07,156 INFO L93 Difference]: Finished difference Result 389 states and 393 transitions. [2020-10-24 02:29:07,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-10-24 02:29:07,158 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 347 [2020-10-24 02:29:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:07,160 INFO L225 Difference]: With dead ends: 389 [2020-10-24 02:29:07,160 INFO L226 Difference]: Without dead ends: 362 [2020-10-24 02:29:07,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-10-24 02:29:07,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-24 02:29:07,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2020-10-24 02:29:07,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-24 02:29:07,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 359 transitions. [2020-10-24 02:29:07,236 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 359 transitions. Word has length 347 [2020-10-24 02:29:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:07,237 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 359 transitions. [2020-10-24 02:29:07,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-10-24 02:29:07,237 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 359 transitions. [2020-10-24 02:29:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-10-24 02:29:07,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:07,240 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:07,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-24 02:29:07,240 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:07,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:07,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1845578601, now seen corresponding path program 45 times [2020-10-24 02:29:07,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:07,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364065239] [2020-10-24 02:29:07,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:14,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6986 backedges. 0 proven. 6975 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:29:14,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364065239] [2020-10-24 02:29:14,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:14,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-10-24 02:29:14,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129336713] [2020-10-24 02:29:14,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-10-24 02:29:14,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:14,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-10-24 02:29:14,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-10-24 02:29:14,940 INFO L87 Difference]: Start difference. First operand 357 states and 359 transitions. Second operand 94 states. [2020-10-24 02:29:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:27,295 INFO L93 Difference]: Finished difference Result 396 states and 400 transitions. [2020-10-24 02:29:27,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-10-24 02:29:27,296 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 354 [2020-10-24 02:29:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:27,299 INFO L225 Difference]: With dead ends: 396 [2020-10-24 02:29:27,299 INFO L226 Difference]: Without dead ends: 369 [2020-10-24 02:29:27,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-10-24 02:29:27,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-24 02:29:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 364. [2020-10-24 02:29:27,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-24 02:29:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 366 transitions. [2020-10-24 02:29:27,378 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 366 transitions. Word has length 354 [2020-10-24 02:29:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:27,378 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 366 transitions. [2020-10-24 02:29:27,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-10-24 02:29:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 366 transitions. [2020-10-24 02:29:27,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-10-24 02:29:27,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:27,381 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:27,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-24 02:29:27,381 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:27,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1259553223, now seen corresponding path program 46 times [2020-10-24 02:29:27,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:27,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362673350] [2020-10-24 02:29:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:36,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7302 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:29:36,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362673350] [2020-10-24 02:29:36,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:36,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-10-24 02:29:36,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551765338] [2020-10-24 02:29:36,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-10-24 02:29:36,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:36,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-10-24 02:29:36,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-10-24 02:29:36,150 INFO L87 Difference]: Start difference. First operand 364 states and 366 transitions. Second operand 96 states. [2020-10-24 02:29:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:49,894 INFO L93 Difference]: Finished difference Result 403 states and 407 transitions. [2020-10-24 02:29:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-10-24 02:29:49,896 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 361 [2020-10-24 02:29:49,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:49,899 INFO L225 Difference]: With dead ends: 403 [2020-10-24 02:29:49,899 INFO L226 Difference]: Without dead ends: 376 [2020-10-24 02:29:49,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-10-24 02:29:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-24 02:29:49,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 371. [2020-10-24 02:29:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-24 02:29:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 373 transitions. [2020-10-24 02:29:49,992 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 373 transitions. Word has length 361 [2020-10-24 02:29:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:49,993 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 373 transitions. [2020-10-24 02:29:49,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-10-24 02:29:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 373 transitions. [2020-10-24 02:29:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-10-24 02:29:49,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:49,996 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:49,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-24 02:29:49,996 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:49,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:49,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1936621207, now seen corresponding path program 47 times [2020-10-24 02:29:49,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:49,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259377397] [2020-10-24 02:29:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:59,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7625 backedges. 0 proven. 7614 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:29:59,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259377397] [2020-10-24 02:29:59,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:59,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2020-10-24 02:29:59,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264778916] [2020-10-24 02:29:59,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-10-24 02:29:59,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:59,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-10-24 02:29:59,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-10-24 02:29:59,639 INFO L87 Difference]: Start difference. First operand 371 states and 373 transitions. Second operand 98 states. [2020-10-24 02:30:16,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:16,125 INFO L93 Difference]: Finished difference Result 410 states and 414 transitions. [2020-10-24 02:30:16,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-10-24 02:30:16,127 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 368 [2020-10-24 02:30:16,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:16,131 INFO L225 Difference]: With dead ends: 410 [2020-10-24 02:30:16,131 INFO L226 Difference]: Without dead ends: 383 [2020-10-24 02:30:16,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-10-24 02:30:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-24 02:30:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 378. [2020-10-24 02:30:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-24 02:30:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 380 transitions. [2020-10-24 02:30:16,210 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 380 transitions. Word has length 368 [2020-10-24 02:30:16,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:16,210 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 380 transitions. [2020-10-24 02:30:16,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-10-24 02:30:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 380 transitions. [2020-10-24 02:30:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-10-24 02:30:16,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:16,213 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:16,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-24 02:30:16,213 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:16,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1814837191, now seen corresponding path program 48 times [2020-10-24 02:30:16,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:16,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110442342] [2020-10-24 02:30:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:26,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7955 backedges. 0 proven. 7944 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:30:26,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110442342] [2020-10-24 02:30:26,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:26,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-10-24 02:30:26,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327484567] [2020-10-24 02:30:26,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-10-24 02:30:26,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:26,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-10-24 02:30:26,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-10-24 02:30:26,770 INFO L87 Difference]: Start difference. First operand 378 states and 380 transitions. Second operand 100 states. [2020-10-24 02:30:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:43,650 INFO L93 Difference]: Finished difference Result 417 states and 421 transitions. [2020-10-24 02:30:43,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-10-24 02:30:43,655 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 375 [2020-10-24 02:30:43,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:43,657 INFO L225 Difference]: With dead ends: 417 [2020-10-24 02:30:43,657 INFO L226 Difference]: Without dead ends: 390 [2020-10-24 02:30:43,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-10-24 02:30:43,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-24 02:30:43,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 385. [2020-10-24 02:30:43,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-24 02:30:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 387 transitions. [2020-10-24 02:30:43,755 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 387 transitions. Word has length 375 [2020-10-24 02:30:43,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:43,756 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 387 transitions. [2020-10-24 02:30:43,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-10-24 02:30:43,756 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 387 transitions. [2020-10-24 02:30:43,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-10-24 02:30:43,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:43,758 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:43,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-24 02:30:43,758 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:43,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:43,759 INFO L82 PathProgramCache]: Analyzing trace with hash -931870569, now seen corresponding path program 49 times [2020-10-24 02:30:43,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:43,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250793094] [2020-10-24 02:30:43,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:55,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8292 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:30:55,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250793094] [2020-10-24 02:30:55,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:55,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2020-10-24 02:30:55,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042923655] [2020-10-24 02:30:55,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-10-24 02:30:55,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:55,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-10-24 02:30:55,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-10-24 02:30:55,878 INFO L87 Difference]: Start difference. First operand 385 states and 387 transitions. Second operand 102 states. [2020-10-24 02:31:15,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:15,136 INFO L93 Difference]: Finished difference Result 424 states and 428 transitions. [2020-10-24 02:31:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-10-24 02:31:15,140 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 382 [2020-10-24 02:31:15,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:15,143 INFO L225 Difference]: With dead ends: 424 [2020-10-24 02:31:15,144 INFO L226 Difference]: Without dead ends: 397 [2020-10-24 02:31:15,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-10-24 02:31:15,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-24 02:31:15,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 392. [2020-10-24 02:31:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-24 02:31:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 394 transitions. [2020-10-24 02:31:15,252 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 394 transitions. Word has length 382 [2020-10-24 02:31:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:15,252 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 394 transitions. [2020-10-24 02:31:15,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-10-24 02:31:15,253 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 394 transitions. [2020-10-24 02:31:15,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-10-24 02:31:15,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:15,255 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:15,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-24 02:31:15,255 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:15,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:15,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1688293945, now seen corresponding path program 50 times [2020-10-24 02:31:15,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:15,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194932495] [2020-10-24 02:31:15,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:28,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8636 backedges. 0 proven. 8625 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:31:28,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194932495] [2020-10-24 02:31:28,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:28,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2020-10-24 02:31:28,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073908049] [2020-10-24 02:31:28,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-10-24 02:31:28,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:28,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-10-24 02:31:28,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-10-24 02:31:28,144 INFO L87 Difference]: Start difference. First operand 392 states and 394 transitions. Second operand 104 states. [2020-10-24 02:31:49,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:49,562 INFO L93 Difference]: Finished difference Result 431 states and 435 transitions. [2020-10-24 02:31:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-10-24 02:31:49,565 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 389 [2020-10-24 02:31:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:49,568 INFO L225 Difference]: With dead ends: 431 [2020-10-24 02:31:49,569 INFO L226 Difference]: Without dead ends: 404 [2020-10-24 02:31:49,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-10-24 02:31:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-24 02:31:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 399. [2020-10-24 02:31:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-24 02:31:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 401 transitions. [2020-10-24 02:31:49,664 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 401 transitions. Word has length 389 [2020-10-24 02:31:49,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:49,664 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 401 transitions. [2020-10-24 02:31:49,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-10-24 02:31:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 401 transitions. [2020-10-24 02:31:49,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-24 02:31:49,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:49,668 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:49,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-24 02:31:49,668 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:49,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1202819735, now seen corresponding path program 51 times [2020-10-24 02:31:49,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:49,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516297771] [2020-10-24 02:31:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:04,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8987 backedges. 0 proven. 8976 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:32:04,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516297771] [2020-10-24 02:32:04,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:04,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2020-10-24 02:32:04,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759456529] [2020-10-24 02:32:04,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-10-24 02:32:04,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:04,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-10-24 02:32:04,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-10-24 02:32:04,223 INFO L87 Difference]: Start difference. First operand 399 states and 401 transitions. Second operand 106 states. [2020-10-24 02:32:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:28,262 INFO L93 Difference]: Finished difference Result 438 states and 442 transitions. [2020-10-24 02:32:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-10-24 02:32:28,265 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 396 [2020-10-24 02:32:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:28,268 INFO L225 Difference]: With dead ends: 438 [2020-10-24 02:32:28,268 INFO L226 Difference]: Without dead ends: 411 [2020-10-24 02:32:28,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-10-24 02:32:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-24 02:32:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 406. [2020-10-24 02:32:28,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-10-24 02:32:28,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 408 transitions. [2020-10-24 02:32:28,368 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 408 transitions. Word has length 396 [2020-10-24 02:32:28,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:28,368 INFO L481 AbstractCegarLoop]: Abstraction has 406 states and 408 transitions. [2020-10-24 02:32:28,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-10-24 02:32:28,369 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 408 transitions. [2020-10-24 02:32:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2020-10-24 02:32:28,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:28,371 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:32:28,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-24 02:32:28,371 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:28,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:28,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1846191047, now seen corresponding path program 52 times [2020-10-24 02:32:28,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:28,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796567133] [2020-10-24 02:32:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:44,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9345 backedges. 0 proven. 9334 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:32:44,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796567133] [2020-10-24 02:32:44,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:44,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2020-10-24 02:32:44,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97917745] [2020-10-24 02:32:44,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-10-24 02:32:44,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:44,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-10-24 02:32:44,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-10-24 02:32:44,787 INFO L87 Difference]: Start difference. First operand 406 states and 408 transitions. Second operand 108 states. [2020-10-24 02:33:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:33:11,833 INFO L93 Difference]: Finished difference Result 445 states and 449 transitions. [2020-10-24 02:33:11,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-10-24 02:33:11,837 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 403 [2020-10-24 02:33:11,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:33:11,839 INFO L225 Difference]: With dead ends: 445 [2020-10-24 02:33:11,839 INFO L226 Difference]: Without dead ends: 418 [2020-10-24 02:33:11,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-10-24 02:33:11,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-10-24 02:33:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 413. [2020-10-24 02:33:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-10-24 02:33:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 415 transitions. [2020-10-24 02:33:11,943 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 415 transitions. Word has length 403 [2020-10-24 02:33:11,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:11,944 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 415 transitions. [2020-10-24 02:33:11,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-10-24 02:33:11,944 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 415 transitions. [2020-10-24 02:33:11,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-10-24 02:33:11,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:11,946 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:33:11,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-24 02:33:11,946 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:11,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:11,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1882923881, now seen corresponding path program 53 times [2020-10-24 02:33:11,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:11,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130119639] [2020-10-24 02:33:11,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:29,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9710 backedges. 0 proven. 9699 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:33:29,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130119639] [2020-10-24 02:33:29,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:29,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2020-10-24 02:33:29,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630300588] [2020-10-24 02:33:29,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-10-24 02:33:29,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:29,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-10-24 02:33:29,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-10-24 02:33:29,688 INFO L87 Difference]: Start difference. First operand 413 states and 415 transitions. Second operand 110 states. [2020-10-24 02:33:59,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:33:59,666 INFO L93 Difference]: Finished difference Result 452 states and 456 transitions. [2020-10-24 02:33:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-10-24 02:33:59,670 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 410 [2020-10-24 02:33:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:33:59,673 INFO L225 Difference]: With dead ends: 452 [2020-10-24 02:33:59,673 INFO L226 Difference]: Without dead ends: 425 [2020-10-24 02:33:59,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-10-24 02:33:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-10-24 02:33:59,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2020-10-24 02:33:59,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-10-24 02:33:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 422 transitions. [2020-10-24 02:33:59,831 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 422 transitions. Word has length 410 [2020-10-24 02:33:59,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:59,831 INFO L481 AbstractCegarLoop]: Abstraction has 420 states and 422 transitions. [2020-10-24 02:33:59,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-10-24 02:33:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 422 transitions. [2020-10-24 02:33:59,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-10-24 02:33:59,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:59,834 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:33:59,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-24 02:33:59,834 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:59,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1852827193, now seen corresponding path program 54 times [2020-10-24 02:33:59,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:59,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685462537] [2020-10-24 02:33:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:20,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:34:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10082 backedges. 0 proven. 10071 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:34:20,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685462537] [2020-10-24 02:34:20,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:34:20,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2020-10-24 02:34:20,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653424387] [2020-10-24 02:34:20,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-10-24 02:34:20,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:34:20,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-10-24 02:34:20,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-10-24 02:34:20,190 INFO L87 Difference]: Start difference. First operand 420 states and 422 transitions. Second operand 112 states. [2020-10-24 02:34:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:34:52,813 INFO L93 Difference]: Finished difference Result 459 states and 463 transitions. [2020-10-24 02:34:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-10-24 02:34:52,818 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 417 [2020-10-24 02:34:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:34:52,821 INFO L225 Difference]: With dead ends: 459 [2020-10-24 02:34:52,821 INFO L226 Difference]: Without dead ends: 432 [2020-10-24 02:34:52,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 47.8s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-10-24 02:34:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-24 02:34:52,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 427. [2020-10-24 02:34:52,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-24 02:34:52,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 429 transitions. [2020-10-24 02:34:52,932 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 429 transitions. Word has length 417 [2020-10-24 02:34:52,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:34:52,932 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 429 transitions. [2020-10-24 02:34:52,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-10-24 02:34:52,932 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 429 transitions. [2020-10-24 02:34:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-10-24 02:34:52,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:34:52,935 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:34:52,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-24 02:34:52,935 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:34:52,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:34:52,936 INFO L82 PathProgramCache]: Analyzing trace with hash 659465879, now seen corresponding path program 55 times [2020-10-24 02:34:52,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:34:52,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118698354] [2020-10-24 02:34:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:34:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:14,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:35:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10461 backedges. 0 proven. 10450 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:35:14,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118698354] [2020-10-24 02:35:14,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:35:14,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2020-10-24 02:35:14,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597394869] [2020-10-24 02:35:14,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-10-24 02:35:14,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:35:14,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-10-24 02:35:14,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-10-24 02:35:14,221 INFO L87 Difference]: Start difference. First operand 427 states and 429 transitions. Second operand 114 states. [2020-10-24 02:35:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:35:49,566 INFO L93 Difference]: Finished difference Result 466 states and 470 transitions. [2020-10-24 02:35:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-10-24 02:35:49,571 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 424 [2020-10-24 02:35:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:35:49,574 INFO L225 Difference]: With dead ends: 466 [2020-10-24 02:35:49,575 INFO L226 Difference]: Without dead ends: 439 [2020-10-24 02:35:49,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-10-24 02:35:49,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-24 02:35:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 434. [2020-10-24 02:35:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-10-24 02:35:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 436 transitions. [2020-10-24 02:35:49,691 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 436 transitions. Word has length 424 [2020-10-24 02:35:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:35:49,691 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 436 transitions. [2020-10-24 02:35:49,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-10-24 02:35:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 436 transitions. [2020-10-24 02:35:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-10-24 02:35:49,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:35:49,694 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:35:49,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-24 02:35:49,694 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:35:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:35:49,695 INFO L82 PathProgramCache]: Analyzing trace with hash -884011065, now seen corresponding path program 56 times [2020-10-24 02:35:49,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:35:49,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042585329] [2020-10-24 02:35:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:35:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:12,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:36:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10847 backedges. 0 proven. 10836 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:36:13,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042585329] [2020-10-24 02:36:13,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:36:13,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2020-10-24 02:36:13,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522123038] [2020-10-24 02:36:13,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-10-24 02:36:13,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:36:13,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-10-24 02:36:13,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-10-24 02:36:13,054 INFO L87 Difference]: Start difference. First operand 434 states and 436 transitions. Second operand 116 states. [2020-10-24 02:36:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:36:45,260 INFO L93 Difference]: Finished difference Result 473 states and 477 transitions. [2020-10-24 02:36:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-10-24 02:36:45,263 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 431 [2020-10-24 02:36:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:36:45,266 INFO L225 Difference]: With dead ends: 473 [2020-10-24 02:36:45,266 INFO L226 Difference]: Without dead ends: 446 [2020-10-24 02:36:45,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-10-24 02:36:45,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-24 02:36:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 441. [2020-10-24 02:36:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-24 02:36:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 443 transitions. [2020-10-24 02:36:45,378 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 443 transitions. Word has length 431 [2020-10-24 02:36:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:36:45,378 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 443 transitions. [2020-10-24 02:36:45,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-10-24 02:36:45,379 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 443 transitions. [2020-10-24 02:36:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-10-24 02:36:45,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:36:45,380 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:36:45,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-24 02:36:45,381 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:36:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:36:45,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2096033943, now seen corresponding path program 57 times [2020-10-24 02:36:45,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:36:45,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735981602] [2020-10-24 02:36:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:36:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:00,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:37:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11240 backedges. 0 proven. 11229 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:37:00,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735981602] [2020-10-24 02:37:00,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:37:00,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2020-10-24 02:37:00,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801087607] [2020-10-24 02:37:00,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-10-24 02:37:00,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:37:00,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-10-24 02:37:00,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-10-24 02:37:00,520 INFO L87 Difference]: Start difference. First operand 441 states and 443 transitions. Second operand 118 states. [2020-10-24 02:37:23,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:37:23,688 INFO L93 Difference]: Finished difference Result 480 states and 484 transitions. [2020-10-24 02:37:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-10-24 02:37:23,691 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 438 [2020-10-24 02:37:23,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:37:23,693 INFO L225 Difference]: With dead ends: 480 [2020-10-24 02:37:23,694 INFO L226 Difference]: Without dead ends: 453 [2020-10-24 02:37:23,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-10-24 02:37:23,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-10-24 02:37:23,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 448. [2020-10-24 02:37:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-10-24 02:37:23,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 450 transitions. [2020-10-24 02:37:23,855 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 450 transitions. Word has length 438 [2020-10-24 02:37:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:37:23,855 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 450 transitions. [2020-10-24 02:37:23,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-10-24 02:37:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 450 transitions. [2020-10-24 02:37:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-10-24 02:37:23,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:37:23,857 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:37:23,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-24 02:37:23,857 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:37:23,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:37:23,858 INFO L82 PathProgramCache]: Analyzing trace with hash -123238969, now seen corresponding path program 58 times [2020-10-24 02:37:23,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:37:23,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355283565] [2020-10-24 02:37:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:37:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:39,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:37:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11640 backedges. 0 proven. 11629 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:37:40,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355283565] [2020-10-24 02:37:40,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:37:40,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2020-10-24 02:37:40,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261773217] [2020-10-24 02:37:40,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-10-24 02:37:40,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:37:40,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-10-24 02:37:40,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-10-24 02:37:40,137 INFO L87 Difference]: Start difference. First operand 448 states and 450 transitions. Second operand 120 states. [2020-10-24 02:38:05,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:05,902 INFO L93 Difference]: Finished difference Result 487 states and 491 transitions. [2020-10-24 02:38:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-10-24 02:38:05,905 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 445 [2020-10-24 02:38:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:05,907 INFO L225 Difference]: With dead ends: 487 [2020-10-24 02:38:05,907 INFO L226 Difference]: Without dead ends: 460 [2020-10-24 02:38:05,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-10-24 02:38:05,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-24 02:38:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 455. [2020-10-24 02:38:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-24 02:38:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 457 transitions. [2020-10-24 02:38:06,041 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 457 transitions. Word has length 445 [2020-10-24 02:38:06,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:06,041 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 457 transitions. [2020-10-24 02:38:06,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-10-24 02:38:06,042 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 457 transitions. [2020-10-24 02:38:06,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-10-24 02:38:06,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:06,044 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:38:06,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-24 02:38:06,044 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:06,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:06,044 INFO L82 PathProgramCache]: Analyzing trace with hash -414860649, now seen corresponding path program 59 times [2020-10-24 02:38:06,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:06,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013535885] [2020-10-24 02:38:06,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat