/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --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/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 21:59:50,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 21:59:50,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 21:59:50,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 21:59:50,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 21:59:50,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 21:59:50,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 21:59:50,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 21:59:50,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 21:59:50,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 21:59:50,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 21:59:50,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 21:59:50,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 21:59:50,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 21:59:50,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 21:59:50,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 21:59:50,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 21:59:50,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 21:59:50,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 21:59:50,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 21:59:50,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 21:59:50,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 21:59:50,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 21:59:50,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 21:59:50,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 21:59:50,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 21:59:50,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 21:59:50,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 21:59:50,247 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 21:59:50,266 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 21:59:50,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 21:59:50,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 21:59:50,269 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 21:59:50,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 21:59:50,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 21:59:50,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 21:59:50,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 21:59:50,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 21:59:50,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 21:59:50,271 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 21:59:50,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 21:59:50,272 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 21:59:50,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 21:59:50,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 21:59:50,273 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 21:59:50,273 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 21:59:50,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 21:59:50,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 21:59:50,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 21:59:50,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 21:59:50,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 21:59:50,274 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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 [2020-09-04 21:59:50,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 21:59:50,751 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 21:59:50,756 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 21:59:50,758 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 21:59:50,758 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 21:59:50,759 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-09-04 21:59:50,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33e842f42/abd60b2c06f84c768fe0f3e141843704/FLAGe5c60ec59 [2020-09-04 21:59:51,411 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 21:59:51,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-09-04 21:59:51,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33e842f42/abd60b2c06f84c768fe0f3e141843704/FLAGe5c60ec59 [2020-09-04 21:59:51,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33e842f42/abd60b2c06f84c768fe0f3e141843704 [2020-09-04 21:59:51,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 21:59:51,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 21:59:51,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 21:59:51,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 21:59:51,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 21:59:51,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:59:51" (1/1) ... [2020-09-04 21:59:51,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc51459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:51, skipping insertion in model container [2020-09-04 21:59:51,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:59:51" (1/1) ... [2020-09-04 21:59:51,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 21:59:51,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 21:59:52,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:59:52,013 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 21:59:52,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:59:52,060 INFO L208 MainTranslator]: Completed translation [2020-09-04 21:59:52,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:52 WrapperNode [2020-09-04 21:59:52,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 21:59:52,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 21:59:52,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 21:59:52,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 21:59:52,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:52" (1/1) ... [2020-09-04 21:59:52,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:52" (1/1) ... [2020-09-04 21:59:52,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:52" (1/1) ... [2020-09-04 21:59:52,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:52" (1/1) ... [2020-09-04 21:59:52,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:52" (1/1) ... [2020-09-04 21:59:52,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:52" (1/1) ... [2020-09-04 21:59:52,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:52" (1/1) ... [2020-09-04 21:59:52,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 21:59:52,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 21:59:52,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 21:59:52,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 21:59:52,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 21:59:52,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 21:59:52,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 21:59:52,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 21:59:52,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 21:59:52,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 21:59:52,295 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 21:59:52,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 21:59:52,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 21:59:52,775 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 21:59:52,775 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 21:59:52,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:59:52 BoogieIcfgContainer [2020-09-04 21:59:52,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 21:59:52,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 21:59:52,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 21:59:52,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 21:59:52,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 09:59:51" (1/3) ... [2020-09-04 21:59:52,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529f8c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:59:52, skipping insertion in model container [2020-09-04 21:59:52,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:52" (2/3) ... [2020-09-04 21:59:52,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529f8c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:59:52, skipping insertion in model container [2020-09-04 21:59:52,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:59:52" (3/3) ... [2020-09-04 21:59:52,792 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-09-04 21:59:52,802 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 21:59:52,813 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 21:59:52,836 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 21:59:52,867 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 21:59:52,867 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 21:59:52,867 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 21:59:52,867 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 21:59:52,868 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 21:59:52,868 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 21:59:52,868 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 21:59:52,868 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 21:59:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-09-04 21:59:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 21:59:52,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:52,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:52,907 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:52,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:52,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1546178992, now seen corresponding path program 1 times [2020-09-04 21:59:52,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:52,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310504399] [2020-09-04 21:59:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:53,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:53,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310504399] [2020-09-04 21:59:53,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:53,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:53,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290037021] [2020-09-04 21:59:53,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:53,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:53,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:53,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:53,263 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 3 states. [2020-09-04 21:59:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:53,416 INFO L93 Difference]: Finished difference Result 279 states and 384 transitions. [2020-09-04 21:59:53,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:53,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-09-04 21:59:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:53,438 INFO L225 Difference]: With dead ends: 279 [2020-09-04 21:59:53,439 INFO L226 Difference]: Without dead ends: 192 [2020-09-04 21:59:53,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:53,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-04 21:59:53,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-09-04 21:59:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-09-04 21:59:53,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 252 transitions. [2020-09-04 21:59:53,528 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 252 transitions. Word has length 79 [2020-09-04 21:59:53,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:53,529 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 252 transitions. [2020-09-04 21:59:53,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 252 transitions. [2020-09-04 21:59:53,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-04 21:59:53,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:53,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:53,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 21:59:53,534 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:53,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:53,535 INFO L82 PathProgramCache]: Analyzing trace with hash 687152074, now seen corresponding path program 1 times [2020-09-04 21:59:53,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:53,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567552473] [2020-09-04 21:59:53,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:53,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:53,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567552473] [2020-09-04 21:59:53,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:53,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:53,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268249955] [2020-09-04 21:59:53,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:53,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:53,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:53,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:53,639 INFO L87 Difference]: Start difference. First operand 190 states and 252 transitions. Second operand 3 states. [2020-09-04 21:59:53,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:53,708 INFO L93 Difference]: Finished difference Result 466 states and 650 transitions. [2020-09-04 21:59:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:53,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-09-04 21:59:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:53,713 INFO L225 Difference]: With dead ends: 466 [2020-09-04 21:59:53,713 INFO L226 Difference]: Without dead ends: 325 [2020-09-04 21:59:53,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:53,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-09-04 21:59:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2020-09-04 21:59:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-09-04 21:59:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 442 transitions. [2020-09-04 21:59:53,778 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 442 transitions. Word has length 80 [2020-09-04 21:59:53,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:53,778 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 442 transitions. [2020-09-04 21:59:53,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:53,779 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 442 transitions. [2020-09-04 21:59:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-04 21:59:53,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:53,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:53,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 21:59:53,782 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:53,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:53,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1261830773, now seen corresponding path program 1 times [2020-09-04 21:59:53,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:53,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684093231] [2020-09-04 21:59:53,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:53,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:53,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684093231] [2020-09-04 21:59:53,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:53,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:53,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837566477] [2020-09-04 21:59:53,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:53,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:53,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:53,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:53,873 INFO L87 Difference]: Start difference. First operand 323 states and 442 transitions. Second operand 3 states. [2020-09-04 21:59:53,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:53,917 INFO L93 Difference]: Finished difference Result 397 states and 552 transitions. [2020-09-04 21:59:53,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:53,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-09-04 21:59:53,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:53,921 INFO L225 Difference]: With dead ends: 397 [2020-09-04 21:59:53,921 INFO L226 Difference]: Without dead ends: 395 [2020-09-04 21:59:53,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-09-04 21:59:53,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 323. [2020-09-04 21:59:53,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-09-04 21:59:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 440 transitions. [2020-09-04 21:59:53,958 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 440 transitions. Word has length 80 [2020-09-04 21:59:53,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:53,959 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 440 transitions. [2020-09-04 21:59:53,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:53,959 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 440 transitions. [2020-09-04 21:59:53,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-04 21:59:53,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:53,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:53,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 21:59:53,963 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:53,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:53,964 INFO L82 PathProgramCache]: Analyzing trace with hash 397182858, now seen corresponding path program 1 times [2020-09-04 21:59:53,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:53,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439902250] [2020-09-04 21:59:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:54,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:54,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439902250] [2020-09-04 21:59:54,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:54,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:54,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108012663] [2020-09-04 21:59:54,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:54,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:54,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:54,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:54,060 INFO L87 Difference]: Start difference. First operand 323 states and 440 transitions. Second operand 3 states. [2020-09-04 21:59:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:54,108 INFO L93 Difference]: Finished difference Result 395 states and 546 transitions. [2020-09-04 21:59:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:54,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-09-04 21:59:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:54,114 INFO L225 Difference]: With dead ends: 395 [2020-09-04 21:59:54,115 INFO L226 Difference]: Without dead ends: 393 [2020-09-04 21:59:54,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-09-04 21:59:54,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 323. [2020-09-04 21:59:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-09-04 21:59:54,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 438 transitions. [2020-09-04 21:59:54,145 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 438 transitions. Word has length 81 [2020-09-04 21:59:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:54,146 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 438 transitions. [2020-09-04 21:59:54,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:54,146 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 438 transitions. [2020-09-04 21:59:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-04 21:59:54,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:54,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:54,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 21:59:54,150 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:54,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:54,150 INFO L82 PathProgramCache]: Analyzing trace with hash -172878236, now seen corresponding path program 1 times [2020-09-04 21:59:54,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:54,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661454076] [2020-09-04 21:59:54,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:54,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:54,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661454076] [2020-09-04 21:59:54,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:54,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:54,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341691515] [2020-09-04 21:59:54,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:54,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:54,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:54,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:54,205 INFO L87 Difference]: Start difference. First operand 323 states and 438 transitions. Second operand 3 states. [2020-09-04 21:59:54,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:54,268 INFO L93 Difference]: Finished difference Result 859 states and 1200 transitions. [2020-09-04 21:59:54,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:54,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-09-04 21:59:54,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:54,272 INFO L225 Difference]: With dead ends: 859 [2020-09-04 21:59:54,273 INFO L226 Difference]: Without dead ends: 585 [2020-09-04 21:59:54,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-09-04 21:59:54,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 583. [2020-09-04 21:59:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-09-04 21:59:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 802 transitions. [2020-09-04 21:59:54,323 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 802 transitions. Word has length 81 [2020-09-04 21:59:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:54,324 INFO L479 AbstractCegarLoop]: Abstraction has 583 states and 802 transitions. [2020-09-04 21:59:54,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 802 transitions. [2020-09-04 21:59:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-04 21:59:54,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:54,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:54,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 21:59:54,327 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:54,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:54,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1064013698, now seen corresponding path program 1 times [2020-09-04 21:59:54,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:54,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175300277] [2020-09-04 21:59:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:54,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:54,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175300277] [2020-09-04 21:59:54,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:54,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:54,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869968449] [2020-09-04 21:59:54,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:54,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:54,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:54,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:54,397 INFO L87 Difference]: Start difference. First operand 583 states and 802 transitions. Second operand 3 states. [2020-09-04 21:59:54,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:54,525 INFO L93 Difference]: Finished difference Result 1627 states and 2276 transitions. [2020-09-04 21:59:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:54,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-09-04 21:59:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:54,533 INFO L225 Difference]: With dead ends: 1627 [2020-09-04 21:59:54,533 INFO L226 Difference]: Without dead ends: 1093 [2020-09-04 21:59:54,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2020-09-04 21:59:54,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1091. [2020-09-04 21:59:54,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2020-09-04 21:59:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1506 transitions. [2020-09-04 21:59:54,618 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1506 transitions. Word has length 82 [2020-09-04 21:59:54,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:54,619 INFO L479 AbstractCegarLoop]: Abstraction has 1091 states and 1506 transitions. [2020-09-04 21:59:54,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:54,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1506 transitions. [2020-09-04 21:59:54,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-04 21:59:54,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:54,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:54,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 21:59:54,627 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:54,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:54,635 INFO L82 PathProgramCache]: Analyzing trace with hash -637098359, now seen corresponding path program 1 times [2020-09-04 21:59:54,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:54,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694908537] [2020-09-04 21:59:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:54,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:54,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694908537] [2020-09-04 21:59:54,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:54,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:54,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807028787] [2020-09-04 21:59:54,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:54,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:54,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:54,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:54,724 INFO L87 Difference]: Start difference. First operand 1091 states and 1506 transitions. Second operand 3 states. [2020-09-04 21:59:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:54,833 INFO L93 Difference]: Finished difference Result 1343 states and 1876 transitions. [2020-09-04 21:59:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:54,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-09-04 21:59:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:54,841 INFO L225 Difference]: With dead ends: 1343 [2020-09-04 21:59:54,841 INFO L226 Difference]: Without dead ends: 1341 [2020-09-04 21:59:54,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2020-09-04 21:59:54,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1091. [2020-09-04 21:59:54,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2020-09-04 21:59:54,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1498 transitions. [2020-09-04 21:59:54,940 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1498 transitions. Word has length 82 [2020-09-04 21:59:54,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:54,940 INFO L479 AbstractCegarLoop]: Abstraction has 1091 states and 1498 transitions. [2020-09-04 21:59:54,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:54,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1498 transitions. [2020-09-04 21:59:54,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-04 21:59:54,942 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:54,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:54,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 21:59:54,943 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:54,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:54,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1659922654, now seen corresponding path program 1 times [2020-09-04 21:59:54,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:54,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377802714] [2020-09-04 21:59:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:54,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:54,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377802714] [2020-09-04 21:59:54,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:54,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:54,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710526606] [2020-09-04 21:59:54,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:54,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:54,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:54,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:54,986 INFO L87 Difference]: Start difference. First operand 1091 states and 1498 transitions. Second operand 3 states. [2020-09-04 21:59:55,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:55,081 INFO L93 Difference]: Finished difference Result 1335 states and 1852 transitions. [2020-09-04 21:59:55,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:55,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-09-04 21:59:55,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:55,090 INFO L225 Difference]: With dead ends: 1335 [2020-09-04 21:59:55,090 INFO L226 Difference]: Without dead ends: 1333 [2020-09-04 21:59:55,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2020-09-04 21:59:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1091. [2020-09-04 21:59:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2020-09-04 21:59:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1490 transitions. [2020-09-04 21:59:55,182 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1490 transitions. Word has length 83 [2020-09-04 21:59:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:55,183 INFO L479 AbstractCegarLoop]: Abstraction has 1091 states and 1490 transitions. [2020-09-04 21:59:55,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1490 transitions. [2020-09-04 21:59:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-04 21:59:55,185 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:55,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:55,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 21:59:55,185 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:55,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:55,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1375558424, now seen corresponding path program 1 times [2020-09-04 21:59:55,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:55,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857834921] [2020-09-04 21:59:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:55,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:55,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857834921] [2020-09-04 21:59:55,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:55,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:55,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709431207] [2020-09-04 21:59:55,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:55,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:55,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:55,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:55,246 INFO L87 Difference]: Start difference. First operand 1091 states and 1490 transitions. Second operand 3 states. [2020-09-04 21:59:55,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:55,444 INFO L93 Difference]: Finished difference Result 3127 states and 4308 transitions. [2020-09-04 21:59:55,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:55,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-09-04 21:59:55,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:55,457 INFO L225 Difference]: With dead ends: 3127 [2020-09-04 21:59:55,458 INFO L226 Difference]: Without dead ends: 2085 [2020-09-04 21:59:55,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2020-09-04 21:59:55,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 2083. [2020-09-04 21:59:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2020-09-04 21:59:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 2834 transitions. [2020-09-04 21:59:55,633 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 2834 transitions. Word has length 83 [2020-09-04 21:59:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:55,633 INFO L479 AbstractCegarLoop]: Abstraction has 2083 states and 2834 transitions. [2020-09-04 21:59:55,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 2834 transitions. [2020-09-04 21:59:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-04 21:59:55,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:55,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:55,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 21:59:55,637 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:55,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:55,638 INFO L82 PathProgramCache]: Analyzing trace with hash -146869603, now seen corresponding path program 1 times [2020-09-04 21:59:55,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:55,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086914275] [2020-09-04 21:59:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:55,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:55,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086914275] [2020-09-04 21:59:55,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:55,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:55,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972956254] [2020-09-04 21:59:55,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:55,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:55,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:55,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:55,689 INFO L87 Difference]: Start difference. First operand 2083 states and 2834 transitions. Second operand 3 states. [2020-09-04 21:59:55,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:55,906 INFO L93 Difference]: Finished difference Result 2535 states and 3476 transitions. [2020-09-04 21:59:55,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:55,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-09-04 21:59:55,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:55,920 INFO L225 Difference]: With dead ends: 2535 [2020-09-04 21:59:55,921 INFO L226 Difference]: Without dead ends: 2533 [2020-09-04 21:59:55,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2020-09-04 21:59:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2083. [2020-09-04 21:59:56,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2020-09-04 21:59:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 2818 transitions. [2020-09-04 21:59:56,062 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 2818 transitions. Word has length 84 [2020-09-04 21:59:56,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:56,063 INFO L479 AbstractCegarLoop]: Abstraction has 2083 states and 2818 transitions. [2020-09-04 21:59:56,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 2818 transitions. [2020-09-04 21:59:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-04 21:59:56,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:56,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:56,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 21:59:56,066 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:56,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:56,066 INFO L82 PathProgramCache]: Analyzing trace with hash -307116750, now seen corresponding path program 1 times [2020-09-04 21:59:56,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:56,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463273659] [2020-09-04 21:59:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:56,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:56,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463273659] [2020-09-04 21:59:56,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:56,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:56,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120627045] [2020-09-04 21:59:56,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:56,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:56,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:56,105 INFO L87 Difference]: Start difference. First operand 2083 states and 2818 transitions. Second operand 3 states. [2020-09-04 21:59:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:56,350 INFO L93 Difference]: Finished difference Result 6055 states and 8228 transitions. [2020-09-04 21:59:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:56,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-09-04 21:59:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:56,371 INFO L225 Difference]: With dead ends: 6055 [2020-09-04 21:59:56,371 INFO L226 Difference]: Without dead ends: 4021 [2020-09-04 21:59:56,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:56,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2020-09-04 21:59:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 4019. [2020-09-04 21:59:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4019 states. [2020-09-04 21:59:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4019 states to 4019 states and 5394 transitions. [2020-09-04 21:59:56,645 INFO L78 Accepts]: Start accepts. Automaton has 4019 states and 5394 transitions. Word has length 84 [2020-09-04 21:59:56,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:56,645 INFO L479 AbstractCegarLoop]: Abstraction has 4019 states and 5394 transitions. [2020-09-04 21:59:56,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:56,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4019 states and 5394 transitions. [2020-09-04 21:59:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 21:59:56,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:56,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:56,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 21:59:56,651 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:56,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:56,651 INFO L82 PathProgramCache]: Analyzing trace with hash -322854350, now seen corresponding path program 1 times [2020-09-04 21:59:56,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:56,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336611711] [2020-09-04 21:59:56,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:56,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:56,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336611711] [2020-09-04 21:59:56,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:56,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:56,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576567455] [2020-09-04 21:59:56,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:56,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:56,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:56,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:56,703 INFO L87 Difference]: Start difference. First operand 4019 states and 5394 transitions. Second operand 3 states. [2020-09-04 21:59:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:57,008 INFO L93 Difference]: Finished difference Result 4855 states and 6548 transitions. [2020-09-04 21:59:57,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:57,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-09-04 21:59:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:57,033 INFO L225 Difference]: With dead ends: 4855 [2020-09-04 21:59:57,033 INFO L226 Difference]: Without dead ends: 4853 [2020-09-04 21:59:57,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4853 states. [2020-09-04 21:59:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4853 to 4019. [2020-09-04 21:59:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4019 states. [2020-09-04 21:59:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4019 states to 4019 states and 5362 transitions. [2020-09-04 21:59:57,317 INFO L78 Accepts]: Start accepts. Automaton has 4019 states and 5362 transitions. Word has length 85 [2020-09-04 21:59:57,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:57,317 INFO L479 AbstractCegarLoop]: Abstraction has 4019 states and 5362 transitions. [2020-09-04 21:59:57,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 4019 states and 5362 transitions. [2020-09-04 21:59:57,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 21:59:57,323 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:57,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:57,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 21:59:57,323 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:57,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:57,324 INFO L82 PathProgramCache]: Analyzing trace with hash -930439220, now seen corresponding path program 1 times [2020-09-04 21:59:57,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:57,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993796868] [2020-09-04 21:59:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:57,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:57,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993796868] [2020-09-04 21:59:57,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:57,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:57,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541670277] [2020-09-04 21:59:57,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:57,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:57,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:57,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:57,363 INFO L87 Difference]: Start difference. First operand 4019 states and 5362 transitions. Second operand 3 states. [2020-09-04 21:59:57,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:57,846 INFO L93 Difference]: Finished difference Result 11767 states and 15732 transitions. [2020-09-04 21:59:57,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:57,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-09-04 21:59:57,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:57,885 INFO L225 Difference]: With dead ends: 11767 [2020-09-04 21:59:57,885 INFO L226 Difference]: Without dead ends: 7797 [2020-09-04 21:59:57,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:57,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7797 states. [2020-09-04 21:59:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7797 to 7795. [2020-09-04 21:59:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7795 states. [2020-09-04 21:59:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 10290 transitions. [2020-09-04 21:59:58,388 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 10290 transitions. Word has length 85 [2020-09-04 21:59:58,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:58,389 INFO L479 AbstractCegarLoop]: Abstraction has 7795 states and 10290 transitions. [2020-09-04 21:59:58,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 10290 transitions. [2020-09-04 21:59:58,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 21:59:58,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:58,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:58,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 21:59:58,395 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:58,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:58,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1483413839, now seen corresponding path program 1 times [2020-09-04 21:59:58,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:58,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963341384] [2020-09-04 21:59:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:58,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:58,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963341384] [2020-09-04 21:59:58,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:58,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:58,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622575569] [2020-09-04 21:59:58,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:58,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:58,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:58,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:58,436 INFO L87 Difference]: Start difference. First operand 7795 states and 10290 transitions. Second operand 3 states. [2020-09-04 21:59:59,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:59,060 INFO L93 Difference]: Finished difference Result 9335 states and 12340 transitions. [2020-09-04 21:59:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:59,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-09-04 21:59:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:59,087 INFO L225 Difference]: With dead ends: 9335 [2020-09-04 21:59:59,087 INFO L226 Difference]: Without dead ends: 9333 [2020-09-04 21:59:59,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9333 states. [2020-09-04 21:59:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9333 to 7795. [2020-09-04 21:59:59,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7795 states. [2020-09-04 21:59:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 10226 transitions. [2020-09-04 21:59:59,862 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 10226 transitions. Word has length 86 [2020-09-04 21:59:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:59,863 INFO L479 AbstractCegarLoop]: Abstraction has 7795 states and 10226 transitions. [2020-09-04 21:59:59,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:59,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 10226 transitions. [2020-09-04 21:59:59,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 21:59:59,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:59,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:59,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 21:59:59,872 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:59,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:59,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1221401062, now seen corresponding path program 1 times [2020-09-04 21:59:59,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:59,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937032264] [2020-09-04 21:59:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:59,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:59,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937032264] [2020-09-04 21:59:59,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:59,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:59,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478114520] [2020-09-04 21:59:59,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:59,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:59,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:59,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:59,912 INFO L87 Difference]: Start difference. First operand 7795 states and 10226 transitions. Second operand 3 states. [2020-09-04 22:00:00,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:00:00,694 INFO L93 Difference]: Finished difference Result 22903 states and 30068 transitions. [2020-09-04 22:00:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 22:00:00,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-09-04 22:00:00,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:00:00,731 INFO L225 Difference]: With dead ends: 22903 [2020-09-04 22:00:00,731 INFO L226 Difference]: Without dead ends: 15157 [2020-09-04 22:00:00,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15157 states. [2020-09-04 22:00:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15157 to 15155. [2020-09-04 22:00:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15155 states. [2020-09-04 22:00:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15155 states to 15155 states and 19634 transitions. [2020-09-04 22:00:01,522 INFO L78 Accepts]: Start accepts. Automaton has 15155 states and 19634 transitions. Word has length 86 [2020-09-04 22:00:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:00:01,523 INFO L479 AbstractCegarLoop]: Abstraction has 15155 states and 19634 transitions. [2020-09-04 22:00:01,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 22:00:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 15155 states and 19634 transitions. [2020-09-04 22:00:01,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-04 22:00:01,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:00:01,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:00:01,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 22:00:01,534 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:00:01,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:00:01,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1193948038, now seen corresponding path program 1 times [2020-09-04 22:00:01,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:00:01,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510160590] [2020-09-04 22:00:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:00:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:00:01,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:00:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:00:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:00:01,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510160590] [2020-09-04 22:00:01,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:00:01,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 22:00:01,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281181409] [2020-09-04 22:00:01,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 22:00:01,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:00:01,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 22:00:01,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:01,573 INFO L87 Difference]: Start difference. First operand 15155 states and 19634 transitions. Second operand 3 states. [2020-09-04 22:00:03,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:00:03,049 INFO L93 Difference]: Finished difference Result 17975 states and 23220 transitions. [2020-09-04 22:00:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 22:00:03,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-09-04 22:00:03,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:00:03,091 INFO L225 Difference]: With dead ends: 17975 [2020-09-04 22:00:03,092 INFO L226 Difference]: Without dead ends: 17973 [2020-09-04 22:00:03,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17973 states. [2020-09-04 22:00:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17973 to 15155. [2020-09-04 22:00:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15155 states. [2020-09-04 22:00:03,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15155 states to 15155 states and 19506 transitions. [2020-09-04 22:00:03,965 INFO L78 Accepts]: Start accepts. Automaton has 15155 states and 19506 transitions. Word has length 87 [2020-09-04 22:00:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:00:03,965 INFO L479 AbstractCegarLoop]: Abstraction has 15155 states and 19506 transitions. [2020-09-04 22:00:03,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 22:00:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 15155 states and 19506 transitions. [2020-09-04 22:00:03,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-04 22:00:03,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:00:03,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:00:03,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 22:00:03,974 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:00:03,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:00:03,974 INFO L82 PathProgramCache]: Analyzing trace with hash -791026560, now seen corresponding path program 1 times [2020-09-04 22:00:03,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:00:03,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642672740] [2020-09-04 22:00:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:00:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:00:04,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:00:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:00:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:00:04,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642672740] [2020-09-04 22:00:04,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:00:04,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 22:00:04,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656738858] [2020-09-04 22:00:04,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 22:00:04,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:00:04,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 22:00:04,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:04,011 INFO L87 Difference]: Start difference. First operand 15155 states and 19506 transitions. Second operand 3 states. [2020-09-04 22:00:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:00:05,361 INFO L93 Difference]: Finished difference Result 44599 states and 57396 transitions. [2020-09-04 22:00:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 22:00:05,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-09-04 22:00:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:00:05,414 INFO L225 Difference]: With dead ends: 44599 [2020-09-04 22:00:05,414 INFO L226 Difference]: Without dead ends: 29493 [2020-09-04 22:00:05,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:05,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29493 states. [2020-09-04 22:00:07,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29493 to 29491. [2020-09-04 22:00:07,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29491 states. [2020-09-04 22:00:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29491 states to 29491 states and 37426 transitions. [2020-09-04 22:00:07,384 INFO L78 Accepts]: Start accepts. Automaton has 29491 states and 37426 transitions. Word has length 87 [2020-09-04 22:00:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:00:07,385 INFO L479 AbstractCegarLoop]: Abstraction has 29491 states and 37426 transitions. [2020-09-04 22:00:07,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 22:00:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 29491 states and 37426 transitions. [2020-09-04 22:00:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-04 22:00:07,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:00:07,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:00:07,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 22:00:07,404 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:00:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:00:07,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1707179323, now seen corresponding path program 1 times [2020-09-04 22:00:07,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:00:07,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019098522] [2020-09-04 22:00:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:00:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:00:07,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:00:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:00:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:00:07,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019098522] [2020-09-04 22:00:07,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:00:07,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 22:00:07,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924812039] [2020-09-04 22:00:07,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 22:00:07,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:00:07,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 22:00:07,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:07,439 INFO L87 Difference]: Start difference. First operand 29491 states and 37426 transitions. Second operand 3 states. [2020-09-04 22:00:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:00:08,906 INFO L93 Difference]: Finished difference Result 34615 states and 43572 transitions. [2020-09-04 22:00:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 22:00:08,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-09-04 22:00:08,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:00:08,944 INFO L225 Difference]: With dead ends: 34615 [2020-09-04 22:00:08,944 INFO L226 Difference]: Without dead ends: 34613 [2020-09-04 22:00:08,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:08,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34613 states. [2020-09-04 22:00:10,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34613 to 29491. [2020-09-04 22:00:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29491 states. [2020-09-04 22:00:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29491 states to 29491 states and 37170 transitions. [2020-09-04 22:00:10,316 INFO L78 Accepts]: Start accepts. Automaton has 29491 states and 37170 transitions. Word has length 88 [2020-09-04 22:00:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:00:10,316 INFO L479 AbstractCegarLoop]: Abstraction has 29491 states and 37170 transitions. [2020-09-04 22:00:10,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 22:00:10,317 INFO L276 IsEmpty]: Start isEmpty. Operand 29491 states and 37170 transitions. [2020-09-04 22:00:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-04 22:00:10,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:00:10,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:00:10,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 22:00:10,330 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:00:10,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:00:10,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1248226970, now seen corresponding path program 1 times [2020-09-04 22:00:10,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:00:10,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288770107] [2020-09-04 22:00:10,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:00:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:00:10,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:00:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:00:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:00:10,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288770107] [2020-09-04 22:00:10,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:00:10,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 22:00:10,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967280682] [2020-09-04 22:00:10,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 22:00:10,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:00:10,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 22:00:10,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:10,364 INFO L87 Difference]: Start difference. First operand 29491 states and 37170 transitions. Second operand 3 states. [2020-09-04 22:00:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:00:13,817 INFO L93 Difference]: Finished difference Result 86839 states and 109364 transitions. [2020-09-04 22:00:13,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 22:00:13,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-09-04 22:00:13,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:00:13,875 INFO L225 Difference]: With dead ends: 86839 [2020-09-04 22:00:13,875 INFO L226 Difference]: Without dead ends: 57397 [2020-09-04 22:00:13,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:13,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57397 states. [2020-09-04 22:00:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57397 to 57395. [2020-09-04 22:00:16,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57395 states. [2020-09-04 22:00:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57395 states to 57395 states and 71218 transitions. [2020-09-04 22:00:16,476 INFO L78 Accepts]: Start accepts. Automaton has 57395 states and 71218 transitions. Word has length 88 [2020-09-04 22:00:16,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:00:16,476 INFO L479 AbstractCegarLoop]: Abstraction has 57395 states and 71218 transitions. [2020-09-04 22:00:16,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 22:00:16,476 INFO L276 IsEmpty]: Start isEmpty. Operand 57395 states and 71218 transitions. [2020-09-04 22:00:16,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-04 22:00:16,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:00:16,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:00:16,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 22:00:16,498 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:00:16,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:00:16,499 INFO L82 PathProgramCache]: Analyzing trace with hash 40577332, now seen corresponding path program 1 times [2020-09-04 22:00:16,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:00:16,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107058984] [2020-09-04 22:00:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:00:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:00:16,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:00:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:00:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:00:16,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107058984] [2020-09-04 22:00:16,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:00:16,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 22:00:16,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124442067] [2020-09-04 22:00:16,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 22:00:16,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:00:16,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 22:00:16,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:16,535 INFO L87 Difference]: Start difference. First operand 57395 states and 71218 transitions. Second operand 3 states. [2020-09-04 22:00:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:00:22,470 INFO L93 Difference]: Finished difference Result 169015 states and 209460 transitions. [2020-09-04 22:00:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 22:00:22,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-09-04 22:00:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:00:22,573 INFO L225 Difference]: With dead ends: 169015 [2020-09-04 22:00:22,573 INFO L226 Difference]: Without dead ends: 85301 [2020-09-04 22:00:22,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:22,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85301 states. [2020-09-04 22:00:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85301 to 85299. [2020-09-04 22:00:26,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85299 states. [2020-09-04 22:00:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85299 states to 85299 states and 103218 transitions. [2020-09-04 22:00:26,963 INFO L78 Accepts]: Start accepts. Automaton has 85299 states and 103218 transitions. Word has length 89 [2020-09-04 22:00:26,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:00:26,963 INFO L479 AbstractCegarLoop]: Abstraction has 85299 states and 103218 transitions. [2020-09-04 22:00:26,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 22:00:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 85299 states and 103218 transitions. [2020-09-04 22:00:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-04 22:00:26,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:00:26,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:00:26,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 22:00:26,988 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:00:26,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:00:26,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1447813926, now seen corresponding path program 1 times [2020-09-04 22:00:26,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:00:26,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622995960] [2020-09-04 22:00:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:00:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:00:27,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:00:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:00:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:00:27,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622995960] [2020-09-04 22:00:27,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:00:27,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 22:00:27,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722956757] [2020-09-04 22:00:27,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 22:00:27,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:00:27,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 22:00:27,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:27,027 INFO L87 Difference]: Start difference. First operand 85299 states and 103218 transitions. Second operand 3 states. [2020-09-04 22:00:32,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:00:32,098 INFO L93 Difference]: Finished difference Result 94519 states and 112948 transitions. [2020-09-04 22:00:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 22:00:32,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-09-04 22:00:32,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:00:32,170 INFO L225 Difference]: With dead ends: 94519 [2020-09-04 22:00:32,171 INFO L226 Difference]: Without dead ends: 66613 [2020-09-04 22:00:32,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:32,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66613 states. [2020-09-04 22:00:34,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66613 to 57395. [2020-09-04 22:00:34,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57395 states. [2020-09-04 22:00:34,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57395 states to 57395 states and 68658 transitions. [2020-09-04 22:00:34,839 INFO L78 Accepts]: Start accepts. Automaton has 57395 states and 68658 transitions. Word has length 89 [2020-09-04 22:00:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:00:34,839 INFO L479 AbstractCegarLoop]: Abstraction has 57395 states and 68658 transitions. [2020-09-04 22:00:34,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 22:00:34,839 INFO L276 IsEmpty]: Start isEmpty. Operand 57395 states and 68658 transitions. [2020-09-04 22:00:34,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-04 22:00:34,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:00:34,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:00:34,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 22:00:34,853 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:00:34,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:00:34,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1997420839, now seen corresponding path program 1 times [2020-09-04 22:00:34,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:00:34,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704110683] [2020-09-04 22:00:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:00:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:00:34,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:00:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:00:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:00:34,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704110683] [2020-09-04 22:00:34,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:00:34,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 22:00:34,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826320518] [2020-09-04 22:00:34,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 22:00:34,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:00:34,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 22:00:34,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:34,890 INFO L87 Difference]: Start difference. First operand 57395 states and 68658 transitions. Second operand 3 states. [2020-09-04 22:00:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:00:37,602 INFO L93 Difference]: Finished difference Result 57395 states and 68658 transitions. [2020-09-04 22:00:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 22:00:37,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-09-04 22:00:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:00:37,604 INFO L225 Difference]: With dead ends: 57395 [2020-09-04 22:00:37,604 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 22:00:37,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:00:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 22:00:37,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 22:00:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 22:00:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 22:00:37,655 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2020-09-04 22:00:37,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:00:37,655 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 22:00:37,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 22:00:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 22:00:37,656 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 22:00:37,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 22:00:37,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 22:00:54,428 WARN L193 SmtUtils]: Spent 16.65 s on a formula simplification. DAG size of input: 2085 DAG size of output: 91 [2020-09-04 22:00:58,453 WARN L193 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 1051 DAG size of output: 15 [2020-09-04 22:01:24,809 WARN L193 SmtUtils]: Spent 26.35 s on a formula simplification. DAG size of input: 3629 DAG size of output: 15 [2020-09-04 22:01:42,116 WARN L193 SmtUtils]: Spent 17.30 s on a formula simplification. DAG size of input: 1071 DAG size of output: 553 [2020-09-04 22:01:58,790 WARN L193 SmtUtils]: Spent 16.66 s on a formula simplification. DAG size of input: 4137 DAG size of output: 3 [2020-09-04 22:02:21,563 WARN L193 SmtUtils]: Spent 22.76 s on a formula simplification. DAG size of input: 2089 DAG size of output: 291 [2020-09-04 22:02:25,014 WARN L193 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 1055 DAG size of output: 35 [2020-09-04 22:02:42,558 WARN L193 SmtUtils]: Spent 17.54 s on a formula simplification. DAG size of input: 2146 DAG size of output: 159 [2020-09-04 22:02:46,570 WARN L193 SmtUtils]: Spent 4.01 s on a formula simplification. DAG size of input: 1167 DAG size of output: 57 [2020-09-04 22:02:51,128 WARN L193 SmtUtils]: Spent 4.56 s on a formula simplification. DAG size of input: 1453 DAG size of output: 25 [2020-09-04 22:03:51,919 WARN L193 SmtUtils]: Spent 1.01 m on a formula simplification. DAG size of input: 2093 DAG size of output: 1067 [2020-09-04 22:03:56,222 WARN L193 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 1059 DAG size of output: 91 [2020-09-04 22:04:29,722 WARN L193 SmtUtils]: Spent 33.50 s on a formula simplification that was a NOOP. DAG size: 1069 [2020-09-04 22:04:55,040 WARN L193 SmtUtils]: Spent 25.31 s on a formula simplification. DAG size of input: 5162 DAG size of output: 7 [2020-09-04 22:05:04,566 WARN L193 SmtUtils]: Spent 9.52 s on a formula simplification. DAG size of input: 1078 DAG size of output: 293 [2020-09-04 22:05:16,484 WARN L193 SmtUtils]: Spent 11.91 s on a formula simplification. DAG size of input: 2073 DAG size of output: 7 [2020-09-04 22:05:25,310 WARN L193 SmtUtils]: Spent 8.82 s on a formula simplification. DAG size of input: 1063 DAG size of output: 291 [2020-09-04 22:05:39,971 WARN L193 SmtUtils]: Spent 14.65 s on a formula simplification. DAG size of input: 2193 DAG size of output: 91 [2020-09-04 22:05:43,901 WARN L193 SmtUtils]: Spent 3.93 s on a formula simplification. DAG size of input: 1262 DAG size of output: 37 [2020-09-04 22:05:50,966 WARN L193 SmtUtils]: Spent 7.06 s on a formula simplification. DAG size of input: 1836 DAG size of output: 17 [2020-09-04 22:06:03,342 WARN L193 SmtUtils]: Spent 12.37 s on a formula simplification. DAG size of input: 2079 DAG size of output: 23 [2020-09-04 22:06:34,488 WARN L193 SmtUtils]: Spent 31.14 s on a formula simplification that was a NOOP. DAG size: 1067 [2020-09-04 22:06:51,688 WARN L193 SmtUtils]: Spent 17.19 s on a formula simplification. DAG size of input: 1071 DAG size of output: 553 [2020-09-04 22:06:57,843 WARN L193 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 1089 DAG size of output: 161 [2020-09-04 22:07:11,110 WARN L193 SmtUtils]: Spent 13.25 s on a formula simplification. DAG size of input: 2083 DAG size of output: 55 [2020-09-04 22:07:14,219 WARN L193 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 1047 DAG size of output: 7 [2020-09-04 22:07:27,971 WARN L193 SmtUtils]: Spent 13.75 s on a formula simplification. DAG size of input: 2288 DAG size of output: 55 [2020-09-04 22:07:32,523 WARN L193 SmtUtils]: Spent 4.55 s on a formula simplification. DAG size of input: 1453 DAG size of output: 25 [2020-09-04 22:07:48,534 WARN L193 SmtUtils]: Spent 16.01 s on a formula simplification. DAG size of input: 2603 DAG size of output: 11 [2020-09-04 22:08:05,871 WARN L193 SmtUtils]: Spent 17.33 s on a formula simplification. DAG size of input: 2087 DAG size of output: 159 [2020-09-04 22:08:09,155 WARN L193 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 1053 DAG size of output: 23 [2020-09-04 22:09:12,779 WARN L193 SmtUtils]: Spent 1.06 m on a formula simplification. DAG size of input: 2100 DAG size of output: 1067 [2020-09-04 22:09:22,444 WARN L193 SmtUtils]: Spent 9.66 s on a formula simplification. DAG size of input: 1078 DAG size of output: 293 [2020-09-04 22:09:27,112 WARN L193 SmtUtils]: Spent 4.66 s on a formula simplification. DAG size of input: 1120 DAG size of output: 93 [2020-09-04 22:10:02,090 WARN L193 SmtUtils]: Spent 34.97 s on a formula simplification. DAG size of input: 2091 DAG size of output: 551 [2020-09-04 22:10:05,823 WARN L193 SmtUtils]: Spent 3.72 s on a formula simplification. DAG size of input: 1057 DAG size of output: 55 [2020-09-04 22:10:19,798 WARN L193 SmtUtils]: Spent 13.97 s on a formula simplification. DAG size of input: 2479 DAG size of output: 35 [2020-09-04 22:10:26,859 WARN L193 SmtUtils]: Spent 7.06 s on a formula simplification. DAG size of input: 1836 DAG size of output: 17 [2020-09-04 22:10:43,543 WARN L193 SmtUtils]: Spent 16.68 s on a formula simplification. DAG size of input: 4137 DAG size of output: 3 [2020-09-04 22:12:43,646 WARN L193 SmtUtils]: Spent 2.00 m on a formula simplification that was a NOOP. DAG size: 2095 [2020-09-04 22:13:19,000 WARN L193 SmtUtils]: Spent 35.34 s on a formula simplification. DAG size of input: 2104 DAG size of output: 551 [2020-09-04 22:13:24,787 WARN L193 SmtUtils]: Spent 5.78 s on a formula simplification. DAG size of input: 1061 DAG size of output: 159 [2020-09-04 22:13:30,896 WARN L193 SmtUtils]: Spent 6.10 s on a formula simplification. DAG size of input: 1089 DAG size of output: 161 [2020-09-04 22:13:34,903 WARN L193 SmtUtils]: Spent 4.00 s on a formula simplification. DAG size of input: 1167 DAG size of output: 57 [2020-09-04 22:13:47,116 WARN L193 SmtUtils]: Spent 12.21 s on a formula simplification. DAG size of input: 2077 DAG size of output: 15 [2020-09-04 22:14:02,668 WARN L193 SmtUtils]: Spent 15.55 s on a formula simplification. DAG size of input: 1065 DAG size of output: 551