/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:38:20,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:38:20,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:38:20,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:38:20,773 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 02:38:20,785 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:38:20,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:38:20,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:38:20,787 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:38:20,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:38:20,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:38:20,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:38:20,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:38:20,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:38:20,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:38:20,789 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:38:20,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:38:20,790 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:38:20,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:38:20,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:38:20,791 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:38:20,791 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:38:20,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:38:20,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:38:20,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:38:20,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:38:20,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:38:20,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:38:21,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:38:21,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:38:21,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:38:21,208 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:38:21,209 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:38:21,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-10-24 02:38:21,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98294f937/0a77b7e0985b4bbea61c38ec1ff5762e/FLAG5769004d5 [2020-10-24 02:38:21,895 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:38:21,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-10-24 02:38:21,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98294f937/0a77b7e0985b4bbea61c38ec1ff5762e/FLAG5769004d5 [2020-10-24 02:38:22,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98294f937/0a77b7e0985b4bbea61c38ec1ff5762e [2020-10-24 02:38:22,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:38:22,283 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:38:22,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:38:22,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:38:22,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:38:22,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:38:22" (1/1) ... [2020-10-24 02:38:22,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@114944e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:22, skipping insertion in model container [2020-10-24 02:38:22,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:38:22" (1/1) ... [2020-10-24 02:38:22,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:38:22,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:38:22,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:38:22,535 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:38:22,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:38:22,572 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:38:22,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:22 WrapperNode [2020-10-24 02:38:22,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:38:22,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:38:22,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:38:22,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:38:22,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:22" (1/1) ... [2020-10-24 02:38:22,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:22" (1/1) ... [2020-10-24 02:38:22,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:22" (1/1) ... [2020-10-24 02:38:22,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:22" (1/1) ... [2020-10-24 02:38:22,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:22" (1/1) ... [2020-10-24 02:38:22,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:22" (1/1) ... [2020-10-24 02:38:22,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:22" (1/1) ... [2020-10-24 02:38:22,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:38:22,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:38:22,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:38:22,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:38:22,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:22" (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 02:38:22,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:38:22,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:38:22,719 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:38:22,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:38:22,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:38:22,720 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:38:22,720 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:38:22,720 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:38:22,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:38:22,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:38:22,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:38:22,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:38:22,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:38:22,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:38:22,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:38:22,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:38:22,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:38:23,062 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:38:23,063 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:38:23,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:38:23 BoogieIcfgContainer [2020-10-24 02:38:23,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:38:23,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:38:23,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:38:23,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:38:23,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:38:22" (1/3) ... [2020-10-24 02:38:23,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a82ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:38:23, skipping insertion in model container [2020-10-24 02:38:23,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:22" (2/3) ... [2020-10-24 02:38:23,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a82ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:38:23, skipping insertion in model container [2020-10-24 02:38:23,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:38:23" (3/3) ... [2020-10-24 02:38:23,110 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_12.c [2020-10-24 02:38:23,143 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:38:23,163 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:38:23,191 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:38:23,236 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:38:23,237 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:38:23,239 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:38:23,240 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:38:23,240 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:38:23,240 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:38:23,241 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:38:23,241 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:38:23,271 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-24 02:38:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-24 02:38:23,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:23,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:38:23,289 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:23,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:23,299 INFO L82 PathProgramCache]: Analyzing trace with hash -901635656, now seen corresponding path program 1 times [2020-10-24 02:38:23,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:23,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877207185] [2020-10-24 02:38:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:23,771 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-24 02:38:23,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:23,831 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 02:38:23,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877207185] [2020-10-24 02:38:23,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:38:23,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:38:23,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581475723] [2020-10-24 02:38:23,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:38:23,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:23,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:38:23,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:38:23,876 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-24 02:38:24,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:24,044 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-24 02:38:24,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:38:24,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-24 02:38:24,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:24,065 INFO L225 Difference]: With dead ends: 50 [2020-10-24 02:38:24,065 INFO L226 Difference]: Without dead ends: 27 [2020-10-24 02:38:24,071 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 02:38:24,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-24 02:38:24,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-24 02:38:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 02:38:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-24 02:38:24,143 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2020-10-24 02:38:24,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:24,144 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-24 02:38:24,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:38:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-24 02:38:24,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-24 02:38:24,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:24,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:38:24,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:38:24,149 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:24,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:24,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1302443770, now seen corresponding path program 1 times [2020-10-24 02:38:24,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:24,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134428384] [2020-10-24 02:38:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:24,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:24,329 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 02:38:24,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134428384] [2020-10-24 02:38:24,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:38:24,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 02:38:24,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081008873] [2020-10-24 02:38:24,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:38:24,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:24,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:38:24,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:38:24,334 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 6 states. [2020-10-24 02:38:24,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:24,620 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-24 02:38:24,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:38:24,621 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-24 02:38:24,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:24,622 INFO L225 Difference]: With dead ends: 39 [2020-10-24 02:38:24,622 INFO L226 Difference]: Without dead ends: 33 [2020-10-24 02:38:24,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:38:24,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-24 02:38:24,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-24 02:38:24,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-24 02:38:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-24 02:38:24,636 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2020-10-24 02:38:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:24,637 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-24 02:38:24,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:38:24,637 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-24 02:38:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-24 02:38:24,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:24,638 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] [2020-10-24 02:38:24,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:38:24,639 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:24,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:24,640 INFO L82 PathProgramCache]: Analyzing trace with hash 642832942, now seen corresponding path program 1 times [2020-10-24 02:38:24,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:24,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906675591] [2020-10-24 02:38:24,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:24,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:24,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906675591] [2020-10-24 02:38:24,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:38:24,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:38:24,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384934170] [2020-10-24 02:38:24,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:38:24,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:24,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:38:24,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:38:24,746 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 4 states. [2020-10-24 02:38:24,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:24,841 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-24 02:38:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:38:24,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-24 02:38:24,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:24,843 INFO L225 Difference]: With dead ends: 48 [2020-10-24 02:38:24,843 INFO L226 Difference]: Without dead ends: 36 [2020-10-24 02:38:24,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:38:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-24 02:38:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-24 02:38:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-24 02:38:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-24 02:38:24,860 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2020-10-24 02:38:24,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:24,861 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-24 02:38:24,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:38:24,861 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-24 02:38:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-24 02:38:24,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:24,863 INFO L422 BasicCegarLoop]: trace histogram [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 02:38:24,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:38:24,863 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:24,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:24,864 INFO L82 PathProgramCache]: Analyzing trace with hash -466055855, now seen corresponding path program 1 times [2020-10-24 02:38:24,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:24,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650238611] [2020-10-24 02:38:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:25,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:25,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650238611] [2020-10-24 02:38:25,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:25,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:38:25,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461798147] [2020-10-24 02:38:25,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:38:25,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:25,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:38:25,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:38:25,035 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 6 states. [2020-10-24 02:38:25,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:25,388 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-24 02:38:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:38:25,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-24 02:38:25,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:25,392 INFO L225 Difference]: With dead ends: 53 [2020-10-24 02:38:25,392 INFO L226 Difference]: Without dead ends: 41 [2020-10-24 02:38:25,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:38:25,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-24 02:38:25,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-24 02:38:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-24 02:38:25,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-24 02:38:25,427 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 32 [2020-10-24 02:38:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:25,430 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-24 02:38:25,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:38:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-24 02:38:25,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-24 02:38:25,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:25,432 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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 02:38:25,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:38:25,434 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:25,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1843550222, now seen corresponding path program 2 times [2020-10-24 02:38:25,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:25,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947315124] [2020-10-24 02:38:25,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:25,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:25,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947315124] [2020-10-24 02:38:25,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:25,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:38:25,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599137534] [2020-10-24 02:38:25,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:38:25,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:25,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:38:25,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:38:25,707 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 8 states. [2020-10-24 02:38:26,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:26,168 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-10-24 02:38:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 02:38:26,169 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-24 02:38:26,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:26,170 INFO L225 Difference]: With dead ends: 58 [2020-10-24 02:38:26,170 INFO L226 Difference]: Without dead ends: 46 [2020-10-24 02:38:26,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:38:26,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-24 02:38:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-24 02:38:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-24 02:38:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-24 02:38:26,186 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-10-24 02:38:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:26,186 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-24 02:38:26,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:38:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-24 02:38:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 02:38:26,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:26,188 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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 02:38:26,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:38:26,189 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:26,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2068495217, now seen corresponding path program 3 times [2020-10-24 02:38:26,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:26,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545171021] [2020-10-24 02:38:26,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:26,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:26,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545171021] [2020-10-24 02:38:26,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:26,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:38:26,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937442635] [2020-10-24 02:38:26,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:38:26,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:26,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:38:26,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:38:26,483 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 10 states. [2020-10-24 02:38:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:26,993 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-10-24 02:38:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:38:26,994 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-24 02:38:26,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:26,996 INFO L225 Difference]: With dead ends: 63 [2020-10-24 02:38:26,996 INFO L226 Difference]: Without dead ends: 51 [2020-10-24 02:38:26,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:38:26,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-24 02:38:27,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-24 02:38:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-24 02:38:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-24 02:38:27,013 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 42 [2020-10-24 02:38:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:27,013 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-24 02:38:27,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:38:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-24 02:38:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-24 02:38:27,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:27,015 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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 02:38:27,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:38:27,015 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:27,016 INFO L82 PathProgramCache]: Analyzing trace with hash 664272366, now seen corresponding path program 4 times [2020-10-24 02:38:27,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:27,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656552977] [2020-10-24 02:38:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:27,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:27,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656552977] [2020-10-24 02:38:27,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:27,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:38:27,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339270651] [2020-10-24 02:38:27,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:38:27,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:27,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:38:27,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:38:27,265 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 12 states. [2020-10-24 02:38:27,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:27,971 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-10-24 02:38:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:38:27,973 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-24 02:38:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:27,975 INFO L225 Difference]: With dead ends: 68 [2020-10-24 02:38:27,975 INFO L226 Difference]: Without dead ends: 56 [2020-10-24 02:38:27,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:38:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-24 02:38:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-24 02:38:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-24 02:38:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-24 02:38:27,993 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2020-10-24 02:38:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:27,993 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-24 02:38:27,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:38:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-24 02:38:27,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-24 02:38:27,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:27,997 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 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 02:38:27,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:38:27,997 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:27,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1735278191, now seen corresponding path program 5 times [2020-10-24 02:38:27,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:27,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706558752] [2020-10-24 02:38:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:28,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:28,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706558752] [2020-10-24 02:38:28,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:28,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-24 02:38:28,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188575845] [2020-10-24 02:38:28,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 02:38:28,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:28,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 02:38:28,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:38:28,294 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 14 states. [2020-10-24 02:38:29,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:29,205 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-10-24 02:38:29,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 02:38:29,206 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-10-24 02:38:29,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:29,207 INFO L225 Difference]: With dead ends: 73 [2020-10-24 02:38:29,207 INFO L226 Difference]: Without dead ends: 61 [2020-10-24 02:38:29,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:38:29,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-24 02:38:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-10-24 02:38:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-24 02:38:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-24 02:38:29,249 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2020-10-24 02:38:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:29,249 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-24 02:38:29,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 02:38:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-24 02:38:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-24 02:38:29,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:29,251 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 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 02:38:29,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:38:29,252 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:29,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1302344754, now seen corresponding path program 6 times [2020-10-24 02:38:29,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:29,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595911366] [2020-10-24 02:38:29,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:29,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 25 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:29,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595911366] [2020-10-24 02:38:29,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:29,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:38:29,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308376895] [2020-10-24 02:38:29,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:38:29,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:29,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:38:29,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:38:29,628 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 16 states. [2020-10-24 02:38:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:30,750 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-10-24 02:38:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-24 02:38:30,750 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-24 02:38:30,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:30,752 INFO L225 Difference]: With dead ends: 78 [2020-10-24 02:38:30,752 INFO L226 Difference]: Without dead ends: 66 [2020-10-24 02:38:30,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 02:38:30,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-24 02:38:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-10-24 02:38:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-24 02:38:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-24 02:38:30,797 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-10-24 02:38:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:30,799 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-24 02:38:30,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:38:30,799 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-24 02:38:30,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-24 02:38:30,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:30,806 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 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 02:38:30,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:38:30,807 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:30,809 INFO L82 PathProgramCache]: Analyzing trace with hash 31432625, now seen corresponding path program 7 times [2020-10-24 02:38:30,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:30,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130228548] [2020-10-24 02:38:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:31,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 29 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:31,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130228548] [2020-10-24 02:38:31,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:31,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:38:31,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094190283] [2020-10-24 02:38:31,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:38:31,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:31,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:38:31,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:38:31,237 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 18 states. [2020-10-24 02:38:32,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:32,673 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-10-24 02:38:32,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 02:38:32,673 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-10-24 02:38:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:32,674 INFO L225 Difference]: With dead ends: 83 [2020-10-24 02:38:32,675 INFO L226 Difference]: Without dead ends: 71 [2020-10-24 02:38:32,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:38:32,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-24 02:38:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-10-24 02:38:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-24 02:38:32,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-24 02:38:32,696 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 62 [2020-10-24 02:38:32,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:32,696 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-24 02:38:32,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:38:32,696 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-24 02:38:32,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-24 02:38:32,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:32,698 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 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 02:38:32,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:38:32,698 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:32,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:32,699 INFO L82 PathProgramCache]: Analyzing trace with hash 463978926, now seen corresponding path program 8 times [2020-10-24 02:38:32,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:32,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127390197] [2020-10-24 02:38:32,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:33,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 33 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:33,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127390197] [2020-10-24 02:38:33,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:33,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-24 02:38:33,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180081102] [2020-10-24 02:38:33,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 02:38:33,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:33,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 02:38:33,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:38:33,132 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 20 states. [2020-10-24 02:38:34,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:34,695 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-10-24 02:38:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-24 02:38:34,696 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-10-24 02:38:34,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:34,697 INFO L225 Difference]: With dead ends: 88 [2020-10-24 02:38:34,697 INFO L226 Difference]: Without dead ends: 76 [2020-10-24 02:38:34,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=224, Invalid=1756, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 02:38:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-24 02:38:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-24 02:38:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-24 02:38:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-24 02:38:34,731 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2020-10-24 02:38:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:34,731 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-24 02:38:34,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 02:38:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-24 02:38:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-24 02:38:34,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:34,742 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 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 02:38:34,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:38:34,743 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:34,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:34,744 INFO L82 PathProgramCache]: Analyzing trace with hash -561621551, now seen corresponding path program 9 times [2020-10-24 02:38:34,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:34,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314148281] [2020-10-24 02:38:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:35,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 37 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:35,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314148281] [2020-10-24 02:38:35,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:35,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 02:38:35,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130735256] [2020-10-24 02:38:35,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 02:38:35,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:35,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 02:38:35,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-10-24 02:38:35,268 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 22 states. [2020-10-24 02:38:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:37,144 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-10-24 02:38:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-24 02:38:37,145 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-24 02:38:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:37,146 INFO L225 Difference]: With dead ends: 93 [2020-10-24 02:38:37,146 INFO L226 Difference]: Without dead ends: 81 [2020-10-24 02:38:37,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2020-10-24 02:38:37,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-24 02:38:37,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-10-24 02:38:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-24 02:38:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-24 02:38:37,166 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 72 [2020-10-24 02:38:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:37,167 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-24 02:38:37,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 02:38:37,167 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-24 02:38:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-24 02:38:37,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:37,168 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 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 02:38:37,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:38:37,169 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:37,169 INFO L82 PathProgramCache]: Analyzing trace with hash -10625138, now seen corresponding path program 10 times [2020-10-24 02:38:37,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:37,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569714318] [2020-10-24 02:38:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:37,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 41 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:37,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569714318] [2020-10-24 02:38:37,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:37,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-24 02:38:37,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029986710] [2020-10-24 02:38:37,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-24 02:38:37,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:37,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-24 02:38:37,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-24 02:38:37,722 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 24 states. [2020-10-24 02:38:39,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:39,842 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2020-10-24 02:38:39,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-24 02:38:39,843 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2020-10-24 02:38:39,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:39,844 INFO L225 Difference]: With dead ends: 98 [2020-10-24 02:38:39,845 INFO L226 Difference]: Without dead ends: 86 [2020-10-24 02:38:39,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=278, Invalid=2692, Unknown=0, NotChecked=0, Total=2970 [2020-10-24 02:38:39,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-24 02:38:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-10-24 02:38:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-24 02:38:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-24 02:38:39,871 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2020-10-24 02:38:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:39,872 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-24 02:38:39,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-24 02:38:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-24 02:38:39,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-24 02:38:39,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:39,873 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 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 02:38:39,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 02:38:39,873 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:39,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:39,874 INFO L82 PathProgramCache]: Analyzing trace with hash -682105871, now seen corresponding path program 11 times [2020-10-24 02:38:39,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:39,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149262821] [2020-10-24 02:38:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:40,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:40,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149262821] [2020-10-24 02:38:40,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:40,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-24 02:38:40,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923024329] [2020-10-24 02:38:40,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-24 02:38:40,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:40,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-24 02:38:40,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-10-24 02:38:40,500 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 26 states. [2020-10-24 02:38:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:43,048 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2020-10-24 02:38:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-24 02:38:43,048 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2020-10-24 02:38:43,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:43,050 INFO L225 Difference]: With dead ends: 103 [2020-10-24 02:38:43,050 INFO L226 Difference]: Without dead ends: 91 [2020-10-24 02:38:43,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 02:38:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-24 02:38:43,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-10-24 02:38:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-24 02:38:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-24 02:38:43,069 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 82 [2020-10-24 02:38:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:43,069 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-24 02:38:43,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-24 02:38:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-24 02:38:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-24 02:38:43,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:43,070 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 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 02:38:43,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 02:38:43,070 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:43,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:43,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1743791470, now seen corresponding path program 12 times [2020-10-24 02:38:43,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:43,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833859272] [2020-10-24 02:38:43,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:43,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 49 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:43,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833859272] [2020-10-24 02:38:43,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:43,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-24 02:38:43,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118916113] [2020-10-24 02:38:43,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 02:38:43,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:43,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 02:38:43,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:38:43,746 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 28 states. [2020-10-24 02:38:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:46,806 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-10-24 02:38:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-24 02:38:46,806 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 87 [2020-10-24 02:38:46,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:46,808 INFO L225 Difference]: With dead ends: 108 [2020-10-24 02:38:46,808 INFO L226 Difference]: Without dead ends: 96 [2020-10-24 02:38:46,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=332, Invalid=3828, Unknown=0, NotChecked=0, Total=4160 [2020-10-24 02:38:46,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-24 02:38:46,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-24 02:38:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-24 02:38:46,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-24 02:38:46,829 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2020-10-24 02:38:46,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:46,829 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-24 02:38:46,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 02:38:46,830 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-24 02:38:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-24 02:38:46,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:46,830 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 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 02:38:46,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 02:38:46,831 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:46,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:46,831 INFO L82 PathProgramCache]: Analyzing trace with hash 916867601, now seen corresponding path program 13 times [2020-10-24 02:38:46,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:46,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448188861] [2020-10-24 02:38:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:47,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 53 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:47,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448188861] [2020-10-24 02:38:47,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:47,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-24 02:38:47,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202778162] [2020-10-24 02:38:47,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-24 02:38:47,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:47,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-24 02:38:47,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:38:47,655 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 30 states. [2020-10-24 02:38:51,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:51,009 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-10-24 02:38:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-24 02:38:51,010 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 92 [2020-10-24 02:38:51,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:51,011 INFO L225 Difference]: With dead ends: 113 [2020-10-24 02:38:51,011 INFO L226 Difference]: Without dead ends: 101 [2020-10-24 02:38:51,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=359, Invalid=4471, Unknown=0, NotChecked=0, Total=4830 [2020-10-24 02:38:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-24 02:38:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2020-10-24 02:38:51,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-24 02:38:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-10-24 02:38:51,035 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 92 [2020-10-24 02:38:51,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:51,036 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-10-24 02:38:51,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-24 02:38:51,036 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-10-24 02:38:51,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-24 02:38:51,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:51,037 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 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 02:38:51,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 02:38:51,038 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:51,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:51,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1370713266, now seen corresponding path program 14 times [2020-10-24 02:38:51,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:51,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525264027] [2020-10-24 02:38:51,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:51,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 57 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:51,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525264027] [2020-10-24 02:38:51,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:51,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-24 02:38:51,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914522340] [2020-10-24 02:38:51,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-24 02:38:51,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:51,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-24 02:38:51,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-10-24 02:38:51,967 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 32 states. [2020-10-24 02:38:55,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:55,803 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-10-24 02:38:55,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-24 02:38:55,804 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 97 [2020-10-24 02:38:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:55,805 INFO L225 Difference]: With dead ends: 118 [2020-10-24 02:38:55,805 INFO L226 Difference]: Without dead ends: 106 [2020-10-24 02:38:55,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=386, Invalid=5164, Unknown=0, NotChecked=0, Total=5550 [2020-10-24 02:38:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-24 02:38:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-10-24 02:38:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-24 02:38:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-24 02:38:55,828 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2020-10-24 02:38:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:55,829 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-24 02:38:55,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-24 02:38:55,829 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-24 02:38:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-24 02:38:55,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:55,830 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 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 02:38:55,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 02:38:55,830 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:55,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:55,831 INFO L82 PathProgramCache]: Analyzing trace with hash 138643505, now seen corresponding path program 15 times [2020-10-24 02:38:55,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:55,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926971301] [2020-10-24 02:38:55,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:56,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 61 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:56,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926971301] [2020-10-24 02:38:56,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:56,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-24 02:38:56,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438270821] [2020-10-24 02:38:56,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-24 02:38:56,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:56,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-24 02:38:56,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 02:38:56,833 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 34 states. [2020-10-24 02:39:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:01,077 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2020-10-24 02:39:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-24 02:39:01,079 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 102 [2020-10-24 02:39:01,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:01,080 INFO L225 Difference]: With dead ends: 123 [2020-10-24 02:39:01,080 INFO L226 Difference]: Without dead ends: 111 [2020-10-24 02:39:01,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=413, Invalid=5907, Unknown=0, NotChecked=0, Total=6320 [2020-10-24 02:39:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-24 02:39:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-24 02:39:01,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-24 02:39:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2020-10-24 02:39:01,103 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 102 [2020-10-24 02:39:01,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:01,103 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2020-10-24 02:39:01,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-24 02:39:01,104 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2020-10-24 02:39:01,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-24 02:39:01,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:01,105 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 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 02:39:01,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 02:39:01,105 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:01,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:01,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1507928366, now seen corresponding path program 16 times [2020-10-24 02:39:01,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:01,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662203282] [2020-10-24 02:39:01,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:02,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 65 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:02,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662203282] [2020-10-24 02:39:02,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:02,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-24 02:39:02,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466084348] [2020-10-24 02:39:02,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-24 02:39:02,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:02,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-24 02:39:02,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 02:39:02,215 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 36 states. [2020-10-24 02:39:06,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:06,911 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2020-10-24 02:39:06,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-24 02:39:06,912 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 107 [2020-10-24 02:39:06,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:06,913 INFO L225 Difference]: With dead ends: 128 [2020-10-24 02:39:06,913 INFO L226 Difference]: Without dead ends: 116 [2020-10-24 02:39:06,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=440, Invalid=6700, Unknown=0, NotChecked=0, Total=7140 [2020-10-24 02:39:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-24 02:39:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-24 02:39:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-24 02:39:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-24 02:39:06,940 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 107 [2020-10-24 02:39:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:06,940 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-24 02:39:06,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-24 02:39:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-24 02:39:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-24 02:39:06,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:06,941 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 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 02:39:06,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 02:39:06,942 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:06,942 INFO L82 PathProgramCache]: Analyzing trace with hash 964795985, now seen corresponding path program 17 times [2020-10-24 02:39:06,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:06,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240641897] [2020-10-24 02:39:06,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:07,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 69 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:08,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240641897] [2020-10-24 02:39:08,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:08,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-24 02:39:08,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106480570] [2020-10-24 02:39:08,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-24 02:39:08,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:08,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-24 02:39:08,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 02:39:08,013 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 38 states. [2020-10-24 02:39:13,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:13,200 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2020-10-24 02:39:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-24 02:39:13,201 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 112 [2020-10-24 02:39:13,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:13,202 INFO L225 Difference]: With dead ends: 133 [2020-10-24 02:39:13,203 INFO L226 Difference]: Without dead ends: 121 [2020-10-24 02:39:13,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=467, Invalid=7543, Unknown=0, NotChecked=0, Total=8010 [2020-10-24 02:39:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-24 02:39:13,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2020-10-24 02:39:13,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-24 02:39:13,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-10-24 02:39:13,233 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 112 [2020-10-24 02:39:13,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:13,233 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-10-24 02:39:13,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-24 02:39:13,235 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-10-24 02:39:13,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-24 02:39:13,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:13,237 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 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 02:39:13,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 02:39:13,238 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:13,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:13,238 INFO L82 PathProgramCache]: Analyzing trace with hash 10217230, now seen corresponding path program 18 times [2020-10-24 02:39:13,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:13,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230503029] [2020-10-24 02:39:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:14,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 73 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:14,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230503029] [2020-10-24 02:39:14,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:14,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-24 02:39:14,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779330293] [2020-10-24 02:39:14,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-24 02:39:14,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:14,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-24 02:39:14,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:39:14,616 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 40 states. [2020-10-24 02:39:20,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:20,377 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2020-10-24 02:39:20,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-24 02:39:20,378 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 117 [2020-10-24 02:39:20,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:20,379 INFO L225 Difference]: With dead ends: 138 [2020-10-24 02:39:20,380 INFO L226 Difference]: Without dead ends: 126 [2020-10-24 02:39:20,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=494, Invalid=8436, Unknown=0, NotChecked=0, Total=8930 [2020-10-24 02:39:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-24 02:39:20,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-10-24 02:39:20,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-24 02:39:20,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-10-24 02:39:20,402 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 117 [2020-10-24 02:39:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:20,402 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-10-24 02:39:20,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-24 02:39:20,402 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-10-24 02:39:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-24 02:39:20,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:20,404 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 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 02:39:20,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-24 02:39:20,404 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:20,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:20,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1187869583, now seen corresponding path program 19 times [2020-10-24 02:39:20,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:20,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106923138] [2020-10-24 02:39:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:21,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 77 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:21,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106923138] [2020-10-24 02:39:21,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:21,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-24 02:39:21,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763154026] [2020-10-24 02:39:21,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-24 02:39:21,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:21,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-24 02:39:21,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1622, Unknown=0, NotChecked=0, Total=1722 [2020-10-24 02:39:21,887 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 42 states. [2020-10-24 02:39:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:28,266 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-10-24 02:39:28,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-24 02:39:28,270 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 122 [2020-10-24 02:39:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:28,271 INFO L225 Difference]: With dead ends: 143 [2020-10-24 02:39:28,271 INFO L226 Difference]: Without dead ends: 131 [2020-10-24 02:39:28,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=521, Invalid=9379, Unknown=0, NotChecked=0, Total=9900 [2020-10-24 02:39:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-24 02:39:28,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-10-24 02:39:28,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-24 02:39:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2020-10-24 02:39:28,294 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 122 [2020-10-24 02:39:28,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:28,295 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2020-10-24 02:39:28,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-24 02:39:28,295 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2020-10-24 02:39:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-24 02:39:28,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:28,296 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 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 02:39:28,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-24 02:39:28,296 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:28,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:28,297 INFO L82 PathProgramCache]: Analyzing trace with hash 652922094, now seen corresponding path program 20 times [2020-10-24 02:39:28,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:28,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213132516] [2020-10-24 02:39:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:29,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 81 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:29,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213132516] [2020-10-24 02:39:29,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:29,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-24 02:39:29,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604663851] [2020-10-24 02:39:29,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-24 02:39:29,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:29,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-24 02:39:29,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 02:39:29,884 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 44 states. [2020-10-24 02:39:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:36,850 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2020-10-24 02:39:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-24 02:39:36,851 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 127 [2020-10-24 02:39:36,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:36,852 INFO L225 Difference]: With dead ends: 148 [2020-10-24 02:39:36,853 INFO L226 Difference]: Without dead ends: 136 [2020-10-24 02:39:36,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=548, Invalid=10372, Unknown=0, NotChecked=0, Total=10920 [2020-10-24 02:39:36,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-24 02:39:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-24 02:39:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-24 02:39:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-10-24 02:39:36,883 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 127 [2020-10-24 02:39:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:36,884 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-10-24 02:39:36,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-24 02:39:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-10-24 02:39:36,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-24 02:39:36,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:36,885 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 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 02:39:36,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-24 02:39:36,886 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:36,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:36,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1750576495, now seen corresponding path program 21 times [2020-10-24 02:39:36,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:36,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318001649] [2020-10-24 02:39:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:38,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 85 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:38,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318001649] [2020-10-24 02:39:38,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:38,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-24 02:39:38,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354028443] [2020-10-24 02:39:38,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-24 02:39:38,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:38,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-24 02:39:38,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1960, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 02:39:38,620 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 46 states. [2020-10-24 02:39:46,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:46,227 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2020-10-24 02:39:46,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-24 02:39:46,228 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 132 [2020-10-24 02:39:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:46,230 INFO L225 Difference]: With dead ends: 153 [2020-10-24 02:39:46,230 INFO L226 Difference]: Without dead ends: 141 [2020-10-24 02:39:46,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=575, Invalid=11415, Unknown=0, NotChecked=0, Total=11990 [2020-10-24 02:39:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-24 02:39:46,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2020-10-24 02:39:46,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-24 02:39:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2020-10-24 02:39:46,266 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 132 [2020-10-24 02:39:46,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:46,266 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2020-10-24 02:39:46,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-24 02:39:46,266 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2020-10-24 02:39:46,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-24 02:39:46,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:46,268 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 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 02:39:46,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-24 02:39:46,268 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:46,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:46,269 INFO L82 PathProgramCache]: Analyzing trace with hash 532404942, now seen corresponding path program 22 times [2020-10-24 02:39:46,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:46,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537906492] [2020-10-24 02:39:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:48,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 89 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:48,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537906492] [2020-10-24 02:39:48,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:48,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-24 02:39:48,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871413600] [2020-10-24 02:39:48,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-24 02:39:48,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:48,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-24 02:39:48,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2020-10-24 02:39:48,192 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 48 states. [2020-10-24 02:39:56,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:56,686 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-10-24 02:39:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-24 02:39:56,687 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2020-10-24 02:39:56,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:56,688 INFO L225 Difference]: With dead ends: 158 [2020-10-24 02:39:56,689 INFO L226 Difference]: Without dead ends: 146 [2020-10-24 02:39:56,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=602, Invalid=12508, Unknown=0, NotChecked=0, Total=13110 [2020-10-24 02:39:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-24 02:39:56,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2020-10-24 02:39:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-24 02:39:56,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-10-24 02:39:56,720 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 137 [2020-10-24 02:39:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:56,720 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-10-24 02:39:56,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-24 02:39:56,721 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-10-24 02:39:56,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-24 02:39:56,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:56,722 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 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 02:39:56,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-24 02:39:56,723 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:56,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:56,723 INFO L82 PathProgramCache]: Analyzing trace with hash 649392305, now seen corresponding path program 23 times [2020-10-24 02:39:56,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:56,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515590581] [2020-10-24 02:39:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:58,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 93 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:58,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515590581] [2020-10-24 02:39:58,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:58,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-24 02:39:58,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661685905] [2020-10-24 02:39:58,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-24 02:39:58,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:58,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-24 02:39:58,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2020-10-24 02:39:58,795 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 50 states. [2020-10-24 02:40:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:07,885 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2020-10-24 02:40:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-24 02:40:07,886 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 142 [2020-10-24 02:40:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:07,887 INFO L225 Difference]: With dead ends: 163 [2020-10-24 02:40:07,887 INFO L226 Difference]: Without dead ends: 151 [2020-10-24 02:40:07,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=629, Invalid=13651, Unknown=0, NotChecked=0, Total=14280 [2020-10-24 02:40:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-24 02:40:07,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2020-10-24 02:40:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-24 02:40:07,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2020-10-24 02:40:07,925 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 142 [2020-10-24 02:40:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:07,926 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2020-10-24 02:40:07,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-24 02:40:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2020-10-24 02:40:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-24 02:40:07,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:07,927 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 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 02:40:07,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-24 02:40:07,928 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:07,929 INFO L82 PathProgramCache]: Analyzing trace with hash -327348050, now seen corresponding path program 24 times [2020-10-24 02:40:07,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:07,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540716478] [2020-10-24 02:40:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:10,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 97 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:10,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540716478] [2020-10-24 02:40:10,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:10,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-24 02:40:10,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826180833] [2020-10-24 02:40:10,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-24 02:40:10,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:10,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-24 02:40:10,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-10-24 02:40:10,245 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 52 states. [2020-10-24 02:40:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:20,089 INFO L93 Difference]: Finished difference Result 168 states and 172 transitions. [2020-10-24 02:40:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-24 02:40:20,090 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 147 [2020-10-24 02:40:20,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:20,092 INFO L225 Difference]: With dead ends: 168 [2020-10-24 02:40:20,093 INFO L226 Difference]: Without dead ends: 156 [2020-10-24 02:40:20,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=656, Invalid=14844, Unknown=0, NotChecked=0, Total=15500 [2020-10-24 02:40:20,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-24 02:40:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2020-10-24 02:40:20,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-24 02:40:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-10-24 02:40:20,121 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 147 [2020-10-24 02:40:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:20,121 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-10-24 02:40:20,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-24 02:40:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-10-24 02:40:20,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-24 02:40:20,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:20,122 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 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 02:40:20,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-24 02:40:20,123 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:20,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:20,123 INFO L82 PathProgramCache]: Analyzing trace with hash 430597841, now seen corresponding path program 25 times [2020-10-24 02:40:20,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:20,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263743154] [2020-10-24 02:40:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:22,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 101 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:22,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263743154] [2020-10-24 02:40:22,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:22,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-24 02:40:22,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252368651] [2020-10-24 02:40:22,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-24 02:40:22,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:22,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-24 02:40:22,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2020-10-24 02:40:22,604 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 54 states. [2020-10-24 02:40:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:33,190 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2020-10-24 02:40:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-24 02:40:33,191 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 152 [2020-10-24 02:40:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:33,193 INFO L225 Difference]: With dead ends: 173 [2020-10-24 02:40:33,194 INFO L226 Difference]: Without dead ends: 161 [2020-10-24 02:40:33,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=683, Invalid=16087, Unknown=0, NotChecked=0, Total=16770 [2020-10-24 02:40:33,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-24 02:40:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2020-10-24 02:40:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-24 02:40:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2020-10-24 02:40:33,226 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 152 [2020-10-24 02:40:33,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:33,227 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2020-10-24 02:40:33,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-24 02:40:33,227 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2020-10-24 02:40:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-24 02:40:33,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:33,228 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 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 02:40:33,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-24 02:40:33,228 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:33,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:33,229 INFO L82 PathProgramCache]: Analyzing trace with hash 488402574, now seen corresponding path program 26 times [2020-10-24 02:40:33,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:33,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081295817] [2020-10-24 02:40:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:35,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 105 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:35,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081295817] [2020-10-24 02:40:35,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:35,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-24 02:40:35,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202494708] [2020-10-24 02:40:35,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-24 02:40:35,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:35,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-24 02:40:35,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2945, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 02:40:35,950 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 56 states. [2020-10-24 02:40:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:47,573 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2020-10-24 02:40:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-24 02:40:47,574 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 157 [2020-10-24 02:40:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:47,576 INFO L225 Difference]: With dead ends: 178 [2020-10-24 02:40:47,576 INFO L226 Difference]: Without dead ends: 166 [2020-10-24 02:40:47,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=710, Invalid=17380, Unknown=0, NotChecked=0, Total=18090 [2020-10-24 02:40:47,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-24 02:40:47,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-10-24 02:40:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-24 02:40:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2020-10-24 02:40:47,616 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 157 [2020-10-24 02:40:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:47,616 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2020-10-24 02:40:47,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-24 02:40:47,616 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2020-10-24 02:40:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-24 02:40:47,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:47,618 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 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 02:40:47,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-24 02:40:47,618 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:47,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1520782095, now seen corresponding path program 27 times [2020-10-24 02:40:47,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:47,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096028263] [2020-10-24 02:40:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:50,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 109 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:50,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096028263] [2020-10-24 02:40:50,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:50,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-24 02:40:50,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489341801] [2020-10-24 02:40:50,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-24 02:40:50,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:50,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-24 02:40:50,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3166, Unknown=0, NotChecked=0, Total=3306 [2020-10-24 02:40:50,775 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 58 states. [2020-10-24 02:41:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:41:03,532 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2020-10-24 02:41:03,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-24 02:41:03,533 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 162 [2020-10-24 02:41:03,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:41:03,535 INFO L225 Difference]: With dead ends: 183 [2020-10-24 02:41:03,535 INFO L226 Difference]: Without dead ends: 171 [2020-10-24 02:41:03,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3322 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=737, Invalid=18723, Unknown=0, NotChecked=0, Total=19460 [2020-10-24 02:41:03,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-24 02:41:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-10-24 02:41:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-24 02:41:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2020-10-24 02:41:03,593 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 162 [2020-10-24 02:41:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:41:03,594 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2020-10-24 02:41:03,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-24 02:41:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2020-10-24 02:41:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-24 02:41:03,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:41:03,596 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 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 02:41:03,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-24 02:41:03,596 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:41:03,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:41:03,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1341655954, now seen corresponding path program 28 times [2020-10-24 02:41:03,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:41:03,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303229972] [2020-10-24 02:41:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:41:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:07,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:41:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 113 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:41:07,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303229972] [2020-10-24 02:41:07,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:41:07,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-24 02:41:07,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941277642] [2020-10-24 02:41:07,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-24 02:41:07,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:41:07,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-24 02:41:07,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 02:41:07,111 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 60 states. [2020-10-24 02:41:21,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:41:21,028 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2020-10-24 02:41:21,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-24 02:41:21,029 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 167 [2020-10-24 02:41:21,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:41:21,031 INFO L225 Difference]: With dead ends: 188 [2020-10-24 02:41:21,032 INFO L226 Difference]: Without dead ends: 176 [2020-10-24 02:41:21,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=764, Invalid=20116, Unknown=0, NotChecked=0, Total=20880 [2020-10-24 02:41:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-24 02:41:21,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2020-10-24 02:41:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-24 02:41:21,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2020-10-24 02:41:21,082 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 167 [2020-10-24 02:41:21,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:41:21,082 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2020-10-24 02:41:21,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-24 02:41:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2020-10-24 02:41:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-24 02:41:21,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:41:21,084 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 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 02:41:21,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-24 02:41:21,085 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:41:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:41:21,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1609049327, now seen corresponding path program 29 times [2020-10-24 02:41:21,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:41:21,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306006834] [2020-10-24 02:41:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:41:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:24,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:41:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 117 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:41:24,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306006834] [2020-10-24 02:41:24,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:41:24,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-24 02:41:24,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489695254] [2020-10-24 02:41:24,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-24 02:41:24,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:41:24,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-24 02:41:24,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2020-10-24 02:41:24,847 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand 62 states. [2020-10-24 02:41:39,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:41:39,867 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2020-10-24 02:41:39,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-24 02:41:39,868 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 172 [2020-10-24 02:41:39,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:41:39,870 INFO L225 Difference]: With dead ends: 193 [2020-10-24 02:41:39,871 INFO L226 Difference]: Without dead ends: 181 [2020-10-24 02:41:39,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=791, Invalid=21559, Unknown=0, NotChecked=0, Total=22350 [2020-10-24 02:41:39,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-24 02:41:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2020-10-24 02:41:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-24 02:41:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2020-10-24 02:41:39,911 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 172 [2020-10-24 02:41:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:41:39,912 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2020-10-24 02:41:39,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-24 02:41:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2020-10-24 02:41:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-24 02:41:39,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:41:39,913 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 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 02:41:39,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-24 02:41:39,914 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:41:39,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:41:39,914 INFO L82 PathProgramCache]: Analyzing trace with hash -231890354, now seen corresponding path program 30 times [2020-10-24 02:41:39,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:41:39,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545753008] [2020-10-24 02:41:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:41:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:43,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:41:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 121 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:41:43,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545753008] [2020-10-24 02:41:43,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:41:43,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-24 02:41:43,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009492831] [2020-10-24 02:41:43,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-24 02:41:43,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:41:43,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-24 02:41:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3877, Unknown=0, NotChecked=0, Total=4032 [2020-10-24 02:41:43,952 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 64 states. [2020-10-24 02:42:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:42:01,183 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2020-10-24 02:42:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-10-24 02:42:01,184 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 177 [2020-10-24 02:42:01,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:42:01,187 INFO L225 Difference]: With dead ends: 198 [2020-10-24 02:42:01,187 INFO L226 Difference]: Without dead ends: 186 [2020-10-24 02:42:01,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=818, Invalid=23052, Unknown=0, NotChecked=0, Total=23870 [2020-10-24 02:42:01,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-24 02:42:01,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-10-24 02:42:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-24 02:42:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2020-10-24 02:42:01,243 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 177 [2020-10-24 02:42:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:42:01,244 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2020-10-24 02:42:01,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-24 02:42:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2020-10-24 02:42:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-24 02:42:01,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:42:01,246 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 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 02:42:01,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-24 02:42:01,246 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:42:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:42:01,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1582048975, now seen corresponding path program 31 times [2020-10-24 02:42:01,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:42:01,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683715521] [2020-10-24 02:42:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:42:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:42:05,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:42:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:42:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 125 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:42:05,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683715521] [2020-10-24 02:42:05,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:42:05,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-24 02:42:05,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219200268] [2020-10-24 02:42:05,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-24 02:42:05,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:42:05,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-24 02:42:05,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=4130, Unknown=0, NotChecked=0, Total=4290 [2020-10-24 02:42:05,909 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 66 states. [2020-10-24 02:42:25,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:42:25,418 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2020-10-24 02:42:25,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-10-24 02:42:25,419 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 182 [2020-10-24 02:42:25,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:42:25,421 INFO L225 Difference]: With dead ends: 203 [2020-10-24 02:42:25,421 INFO L226 Difference]: Without dead ends: 191 [2020-10-24 02:42:25,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4372 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=845, Invalid=24595, Unknown=0, NotChecked=0, Total=25440 [2020-10-24 02:42:25,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-24 02:42:25,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2020-10-24 02:42:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-24 02:42:25,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2020-10-24 02:42:25,477 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 182 [2020-10-24 02:42:25,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:42:25,478 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2020-10-24 02:42:25,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-24 02:42:25,478 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2020-10-24 02:42:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-24 02:42:25,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:42:25,480 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 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 02:42:25,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-24 02:42:25,480 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:42:25,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:42:25,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1593538606, now seen corresponding path program 32 times [2020-10-24 02:42:25,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:42:25,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206098466] [2020-10-24 02:42:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:42:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:42:30,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:42:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:42:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 129 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:42:30,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206098466] [2020-10-24 02:42:30,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:42:30,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-24 02:42:30,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339176162] [2020-10-24 02:42:30,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-24 02:42:30,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:42:30,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-24 02:42:30,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2020-10-24 02:42:30,688 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 68 states. [2020-10-24 02:42:51,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:42:51,520 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2020-10-24 02:42:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-10-24 02:42:51,521 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 187 [2020-10-24 02:42:51,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:42:51,523 INFO L225 Difference]: With dead ends: 208 [2020-10-24 02:42:51,523 INFO L226 Difference]: Without dead ends: 196 [2020-10-24 02:42:51,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4657 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=872, Invalid=26188, Unknown=0, NotChecked=0, Total=27060 [2020-10-24 02:42:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-24 02:42:51,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2020-10-24 02:42:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-24 02:42:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2020-10-24 02:42:51,574 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 187 [2020-10-24 02:42:51,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:42:51,575 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2020-10-24 02:42:51,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-24 02:42:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2020-10-24 02:42:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-24 02:42:51,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:42:51,577 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 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 02:42:51,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-24 02:42:51,577 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:42:51,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:42:51,577 INFO L82 PathProgramCache]: Analyzing trace with hash 595636049, now seen corresponding path program 33 times [2020-10-24 02:42:51,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:42:51,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072171472] [2020-10-24 02:42:51,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:42:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:42:57,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:42:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:42:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 133 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:42:57,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072171472] [2020-10-24 02:42:57,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:42:57,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-24 02:42:57,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534672443] [2020-10-24 02:42:57,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-24 02:42:57,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:42:57,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-24 02:42:57,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4660, Unknown=0, NotChecked=0, Total=4830 [2020-10-24 02:42:57,490 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 70 states. [2020-10-24 02:43:20,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:43:20,871 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2020-10-24 02:43:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-10-24 02:43:20,872 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 192 [2020-10-24 02:43:20,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:43:20,874 INFO L225 Difference]: With dead ends: 213 [2020-10-24 02:43:20,874 INFO L226 Difference]: Without dead ends: 201 [2020-10-24 02:43:20,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=899, Invalid=27831, Unknown=0, NotChecked=0, Total=28730 [2020-10-24 02:43:20,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-24 02:43:20,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-10-24 02:43:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-24 02:43:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2020-10-24 02:43:20,944 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 192 [2020-10-24 02:43:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:43:20,945 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2020-10-24 02:43:20,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-24 02:43:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2020-10-24 02:43:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-24 02:43:20,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:43:20,947 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 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 02:43:20,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-24 02:43:20,947 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:43:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:43:20,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2141227506, now seen corresponding path program 34 times [2020-10-24 02:43:20,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:43:20,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046522005] [2020-10-24 02:43:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:43:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:27,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:43:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:43:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 137 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:43:27,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046522005] [2020-10-24 02:43:27,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:43:27,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-24 02:43:27,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795958478] [2020-10-24 02:43:27,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-24 02:43:27,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:43:27,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-24 02:43:27,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4937, Unknown=0, NotChecked=0, Total=5112 [2020-10-24 02:43:27,306 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 72 states. [2020-10-24 02:43:53,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:43:53,280 INFO L93 Difference]: Finished difference Result 218 states and 222 transitions. [2020-10-24 02:43:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-24 02:43:53,281 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 197 [2020-10-24 02:43:53,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:43:53,283 INFO L225 Difference]: With dead ends: 218 [2020-10-24 02:43:53,283 INFO L226 Difference]: Without dead ends: 206 [2020-10-24 02:43:53,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5254 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=926, Invalid=29524, Unknown=0, NotChecked=0, Total=30450 [2020-10-24 02:43:53,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-24 02:43:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2020-10-24 02:43:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-24 02:43:53,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2020-10-24 02:43:53,329 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 197 [2020-10-24 02:43:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:43:53,329 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2020-10-24 02:43:53,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-24 02:43:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2020-10-24 02:43:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-24 02:43:53,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:43:53,331 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 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 02:43:53,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-24 02:43:53,331 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:43:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:43:53,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1605345935, now seen corresponding path program 35 times [2020-10-24 02:43:53,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:43:53,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875042475] [2020-10-24 02:43:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:43:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:00,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:44:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 141 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:44:00,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875042475] [2020-10-24 02:44:00,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:44:00,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-24 02:44:00,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061305208] [2020-10-24 02:44:00,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-24 02:44:00,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:44:00,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-24 02:44:00,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=5222, Unknown=0, NotChecked=0, Total=5402 [2020-10-24 02:44:00,878 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand 74 states. [2020-10-24 02:44:30,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:44:30,202 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2020-10-24 02:44:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-10-24 02:44:30,203 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 202 [2020-10-24 02:44:30,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:44:30,204 INFO L225 Difference]: With dead ends: 223 [2020-10-24 02:44:30,205 INFO L226 Difference]: Without dead ends: 211 [2020-10-24 02:44:30,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5566 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=953, Invalid=31267, Unknown=0, NotChecked=0, Total=32220 [2020-10-24 02:44:30,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-24 02:44:30,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2020-10-24 02:44:30,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-24 02:44:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2020-10-24 02:44:30,274 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 202 [2020-10-24 02:44:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:44:30,274 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2020-10-24 02:44:30,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-24 02:44:30,275 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2020-10-24 02:44:30,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-24 02:44:30,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:44:30,276 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 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 02:44:30,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-24 02:44:30,276 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:44:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:44:30,276 INFO L82 PathProgramCache]: Analyzing trace with hash -825779218, now seen corresponding path program 36 times [2020-10-24 02:44:30,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:44:30,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924480410] [2020-10-24 02:44:30,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:44:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:37,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:44:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:44:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 145 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:44:37,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924480410] [2020-10-24 02:44:37,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:44:37,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-24 02:44:37,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777219848] [2020-10-24 02:44:37,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-24 02:44:37,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:44:37,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-24 02:44:37,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=5515, Unknown=0, NotChecked=0, Total=5700 [2020-10-24 02:44:37,222 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 76 states. [2020-10-24 02:45:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:45:10,595 INFO L93 Difference]: Finished difference Result 228 states and 232 transitions. [2020-10-24 02:45:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-10-24 02:45:10,597 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 207 [2020-10-24 02:45:10,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:45:10,600 INFO L225 Difference]: With dead ends: 228 [2020-10-24 02:45:10,600 INFO L226 Difference]: Without dead ends: 216 [2020-10-24 02:45:10,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5887 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=980, Invalid=33060, Unknown=0, NotChecked=0, Total=34040 [2020-10-24 02:45:10,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-24 02:45:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2020-10-24 02:45:10,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-24 02:45:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2020-10-24 02:45:10,673 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 207 [2020-10-24 02:45:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:45:10,673 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2020-10-24 02:45:10,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-24 02:45:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2020-10-24 02:45:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-24 02:45:10,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:45:10,675 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 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 02:45:10,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-24 02:45:10,675 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:45:10,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:45:10,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1267407983, now seen corresponding path program 37 times [2020-10-24 02:45:10,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:45:10,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286355461] [2020-10-24 02:45:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:45:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:45:20,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:45:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:45:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 149 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:45:20,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286355461] [2020-10-24 02:45:20,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:45:20,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-24 02:45:20,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189640575] [2020-10-24 02:45:20,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-24 02:45:20,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:45:20,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-24 02:45:20,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5816, Unknown=0, NotChecked=0, Total=6006 [2020-10-24 02:45:20,149 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand 78 states. [2020-10-24 02:45:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:45:58,415 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2020-10-24 02:45:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-10-24 02:45:58,417 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 212 [2020-10-24 02:45:58,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:45:58,418 INFO L225 Difference]: With dead ends: 233 [2020-10-24 02:45:58,418 INFO L226 Difference]: Without dead ends: 221 [2020-10-24 02:45:58,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=1007, Invalid=34903, Unknown=0, NotChecked=0, Total=35910 [2020-10-24 02:45:58,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-24 02:45:58,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2020-10-24 02:45:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-24 02:45:58,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2020-10-24 02:45:58,490 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 212 [2020-10-24 02:45:58,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:45:58,491 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2020-10-24 02:45:58,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-24 02:45:58,491 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2020-10-24 02:45:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-24 02:45:58,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:45:58,492 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 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 02:45:58,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-24 02:45:58,492 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:45:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:45:58,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1860048434, now seen corresponding path program 38 times [2020-10-24 02:45:58,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:45:58,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571788580] [2020-10-24 02:45:58,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:45:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:46:08,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:46:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:46:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 153 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:46:08,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571788580] [2020-10-24 02:46:08,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:46:08,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-24 02:46:08,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558382034] [2020-10-24 02:46:08,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-24 02:46:08,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:46:08,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-24 02:46:08,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=6125, Unknown=0, NotChecked=0, Total=6320 [2020-10-24 02:46:08,639 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand 80 states. [2020-10-24 02:46:50,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:46:50,728 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2020-10-24 02:46:50,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-10-24 02:46:50,730 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 217 [2020-10-24 02:46:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:46:50,732 INFO L225 Difference]: With dead ends: 238 [2020-10-24 02:46:50,732 INFO L226 Difference]: Without dead ends: 226 [2020-10-24 02:46:50,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6556 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=1034, Invalid=36796, Unknown=0, NotChecked=0, Total=37830 [2020-10-24 02:46:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-24 02:46:50,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2020-10-24 02:46:50,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-24 02:46:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2020-10-24 02:46:50,787 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 217 [2020-10-24 02:46:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:46:50,787 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2020-10-24 02:46:50,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-24 02:46:50,787 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2020-10-24 02:46:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-24 02:46:50,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:46:50,789 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 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 02:46:50,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-24 02:46:50,789 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:46:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:46:50,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1036009905, now seen corresponding path program 39 times [2020-10-24 02:46:50,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:46:50,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910546221] [2020-10-24 02:46:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:46:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:47:01,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:47:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:47:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 157 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:47:01,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910546221] [2020-10-24 02:47:01,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:47:01,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-24 02:47:01,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556161107] [2020-10-24 02:47:01,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-24 02:47:01,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:47:01,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-24 02:47:01,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=6442, Unknown=0, NotChecked=0, Total=6642 [2020-10-24 02:47:01,924 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand 82 states. [2020-10-24 02:47:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:47:50,375 INFO L93 Difference]: Finished difference Result 243 states and 247 transitions. [2020-10-24 02:47:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-10-24 02:47:50,379 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 222 [2020-10-24 02:47:50,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:47:50,381 INFO L225 Difference]: With dead ends: 243 [2020-10-24 02:47:50,382 INFO L226 Difference]: Without dead ends: 231 [2020-10-24 02:47:50,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6904 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=1061, Invalid=38739, Unknown=0, NotChecked=0, Total=39800 [2020-10-24 02:47:50,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-24 02:47:50,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2020-10-24 02:47:50,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-24 02:47:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2020-10-24 02:47:50,434 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 222 [2020-10-24 02:47:50,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:47:50,434 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2020-10-24 02:47:50,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-24 02:47:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2020-10-24 02:47:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-24 02:47:50,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:47:50,435 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 40, 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 02:47:50,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-24 02:47:50,435 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:47:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:47:50,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1126408274, now seen corresponding path program 40 times [2020-10-24 02:47:50,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:47:50,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514706220] [2020-10-24 02:47:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:47:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:48:03,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:48:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:48:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 161 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:48:03,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514706220] [2020-10-24 02:48:03,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:48:03,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-24 02:48:03,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302667132] [2020-10-24 02:48:03,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-24 02:48:03,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:48:03,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-24 02:48:03,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6767, Unknown=0, NotChecked=0, Total=6972 [2020-10-24 02:48:03,482 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 84 states. [2020-10-24 02:48:58,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:48:58,573 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2020-10-24 02:48:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-10-24 02:48:58,576 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 227 [2020-10-24 02:48:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:48:58,578 INFO L225 Difference]: With dead ends: 248 [2020-10-24 02:48:58,578 INFO L226 Difference]: Without dead ends: 236 [2020-10-24 02:48:58,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7261 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=1088, Invalid=40732, Unknown=0, NotChecked=0, Total=41820 [2020-10-24 02:48:58,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-24 02:48:58,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2020-10-24 02:48:58,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-24 02:48:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2020-10-24 02:48:58,661 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 227 [2020-10-24 02:48:58,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:48:58,662 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2020-10-24 02:48:58,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-24 02:48:58,662 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2020-10-24 02:48:58,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-24 02:48:58,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:48:58,664 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 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 02:48:58,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-24 02:48:58,664 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:48:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:48:58,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2072278993, now seen corresponding path program 41 times [2020-10-24 02:48:58,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:48:58,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548113784] [2020-10-24 02:48:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:48:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:49:13,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:49:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:49:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 165 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:49:13,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548113784] [2020-10-24 02:49:13,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:49:13,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-24 02:49:13,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179718897] [2020-10-24 02:49:13,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-24 02:49:13,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:49:13,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-24 02:49:13,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=7100, Unknown=0, NotChecked=0, Total=7310 [2020-10-24 02:49:13,209 INFO L87 Difference]: Start difference. First operand 234 states and 236 transitions. Second operand 86 states. [2020-10-24 02:50:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:50:15,178 INFO L93 Difference]: Finished difference Result 253 states and 257 transitions. [2020-10-24 02:50:15,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-10-24 02:50:15,182 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 232 [2020-10-24 02:50:15,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:50:15,185 INFO L225 Difference]: With dead ends: 253 [2020-10-24 02:50:15,185 INFO L226 Difference]: Without dead ends: 241 [2020-10-24 02:50:15,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7627 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=1115, Invalid=42775, Unknown=0, NotChecked=0, Total=43890 [2020-10-24 02:50:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-24 02:50:15,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2020-10-24 02:50:15,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-24 02:50:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2020-10-24 02:50:15,267 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 232 [2020-10-24 02:50:15,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:50:15,267 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2020-10-24 02:50:15,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-24 02:50:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2020-10-24 02:50:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-24 02:50:15,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:50:15,270 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 42, 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 02:50:15,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-24 02:50:15,270 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:50:15,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:50:15,270 INFO L82 PathProgramCache]: Analyzing trace with hash -706413170, now seen corresponding path program 42 times [2020-10-24 02:50:15,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:50:15,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863103611] [2020-10-24 02:50:15,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:50:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:31,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:50:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:50:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 169 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:50:31,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863103611] [2020-10-24 02:50:31,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:50:31,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-24 02:50:31,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522684900] [2020-10-24 02:50:31,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-24 02:50:31,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:50:31,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-24 02:50:31,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=7441, Unknown=0, NotChecked=0, Total=7656 [2020-10-24 02:50:31,778 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand 88 states.