/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:23:04,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:23:04,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:23:04,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:23:04,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:23:04,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:23:04,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:23:04,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:23:04,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:23:04,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:23:04,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:23:04,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:23:04,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:23:04,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:23:04,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:23:04,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:23:04,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:23:04,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:23:04,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:23:04,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:23:04,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:23:04,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:23:04,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:23:04,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:23:04,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:23:04,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:23:04,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:23:04,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:23:04,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:23:04,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:23:04,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:23:04,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:23:04,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:23:04,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:23:04,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:23:04,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:23:04,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:23:04,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:23:04,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:23:04,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:23:04,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:23:04,178 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 11:23:04,224 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:23:04,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:23:04,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:23:04,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:23:04,226 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:23:04,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:23:04,227 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:23:04,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:23:04,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:23:04,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:23:04,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:23:04,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:23:04,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:23:04,230 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:23:04,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:23:04,230 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:23:04,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:23:04,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:23:04,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:23:04,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:23:04,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:23:04,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:23:04,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:23:04,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:23:04,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:23:04,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:23:04,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:23:04,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:23:04,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:23:04,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:23:04,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:23:04,703 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:23:04,707 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:23:04,709 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:23:04,710 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:23:04,711 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-09-21 11:23:04,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c29345833/bd7ef482d11d4d4b836bc3631c4b0329/FLAG64a0f5b0e [2020-09-21 11:23:05,369 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:23:05,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-09-21 11:23:05,380 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c29345833/bd7ef482d11d4d4b836bc3631c4b0329/FLAG64a0f5b0e [2020-09-21 11:23:05,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c29345833/bd7ef482d11d4d4b836bc3631c4b0329 [2020-09-21 11:23:05,661 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:23:05,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:23:05,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:05,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:23:05,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:23:05,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:05" (1/1) ... [2020-09-21 11:23:05,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a765448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:05, skipping insertion in model container [2020-09-21 11:23:05,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:05" (1/1) ... [2020-09-21 11:23:05,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:23:05,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:23:05,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:05,953 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:23:05,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:06,000 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:23:06,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:06 WrapperNode [2020-09-21 11:23:06,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:06,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:23:06,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:23:06,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:23:06,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:06" (1/1) ... [2020-09-21 11:23:06,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:06" (1/1) ... [2020-09-21 11:23:06,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:06" (1/1) ... [2020-09-21 11:23:06,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:06" (1/1) ... [2020-09-21 11:23:06,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:06" (1/1) ... [2020-09-21 11:23:06,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:06" (1/1) ... [2020-09-21 11:23:06,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:06" (1/1) ... [2020-09-21 11:23:06,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:23:06,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:23:06,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:23:06,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:23:06,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:06" (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 [2020-09-21 11:23:06,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:23:06,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:23:06,214 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:23:06,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:23:06,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:23:06,215 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:23:06,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:23:06,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:23:06,575 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:23:06,575 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:23:06,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:06 BoogieIcfgContainer [2020-09-21 11:23:06,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:23:06,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:23:06,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:23:06,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:23:06,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:23:05" (1/3) ... [2020-09-21 11:23:06,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1049334f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:06, skipping insertion in model container [2020-09-21 11:23:06,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:06" (2/3) ... [2020-09-21 11:23:06,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1049334f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:06, skipping insertion in model container [2020-09-21 11:23:06,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:06" (3/3) ... [2020-09-21 11:23:06,592 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-09-21 11:23:06,604 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:23:06,615 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:23:06,635 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:23:06,667 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:23:06,668 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:23:06,668 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:23:06,668 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:23:06,668 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:23:06,669 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:23:06,669 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:23:06,669 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:23:06,690 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-09-21 11:23:06,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:23:06,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:06,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:06,699 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:06,706 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-09-21 11:23:06,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:06,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038721124] [2020-09-21 11:23:06,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:06,883 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:06,884 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:06,884 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:06,884 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:06,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:23:06,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:06,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 11:23:06,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:06,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:06,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:23:06,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:23:06,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:06,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:06,977 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:06,977 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:06,977 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:06,978 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:06,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:06,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:06,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:06,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:06,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:06,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:06,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:06,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:06,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038721124] [2020-09-21 11:23:06,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:06,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:06,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313027869] [2020-09-21 11:23:07,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:07,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:07,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:07,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:07,024 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-09-21 11:23:07,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:07,097 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-09-21 11:23:07,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:07,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-09-21 11:23:07,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:07,117 INFO L225 Difference]: With dead ends: 81 [2020-09-21 11:23:07,117 INFO L226 Difference]: Without dead ends: 66 [2020-09-21 11:23:07,122 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 [2020-09-21 11:23:07,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-21 11:23:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-09-21 11:23:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 11:23:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-09-21 11:23:07,182 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-09-21 11:23:07,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:07,183 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-09-21 11:23:07,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:07,183 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-09-21 11:23:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:23:07,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:07,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:07,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:23:07,185 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:07,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:07,186 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-09-21 11:23:07,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:07,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028425343] [2020-09-21 11:23:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:07,221 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:07,221 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:07,222 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:07,222 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:07,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:23:07,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:07,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:23:07,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:23:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:07,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:07,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:07,287 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:07,288 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:07,288 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:07,289 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:07,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:07,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:07,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:07,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:07,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:07,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:07,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:07,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:07,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028425343] [2020-09-21 11:23:07,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:07,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:07,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419481296] [2020-09-21 11:23:07,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:07,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:07,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:07,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:07,300 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-09-21 11:23:07,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:07,333 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-09-21 11:23:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:07,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-09-21 11:23:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:07,336 INFO L225 Difference]: With dead ends: 107 [2020-09-21 11:23:07,336 INFO L226 Difference]: Without dead ends: 66 [2020-09-21 11:23:07,338 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 [2020-09-21 11:23:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-21 11:23:07,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-09-21 11:23:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 11:23:07,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-09-21 11:23:07,351 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-09-21 11:23:07,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:07,352 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-09-21 11:23:07,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-09-21 11:23:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:23:07,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:07,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:07,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:23:07,355 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:07,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:07,356 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-09-21 11:23:07,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:07,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370124049] [2020-09-21 11:23:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:07,413 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:07,414 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:07,414 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:07,414 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:07,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:23:07,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:07,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:23:07,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:07,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:07,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:23:07,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:07,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 11:23:07,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:07,486 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:07,486 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:07,486 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:07,487 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:07,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:07,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:07,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:07,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:07,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:07,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370124049] [2020-09-21 11:23:07,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:07,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:07,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113434565] [2020-09-21 11:23:07,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:07,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:07,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:07,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:07,495 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-09-21 11:23:07,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:07,517 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-09-21 11:23:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:07,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 11:23:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:07,520 INFO L225 Difference]: With dead ends: 99 [2020-09-21 11:23:07,520 INFO L226 Difference]: Without dead ends: 69 [2020-09-21 11:23:07,521 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 [2020-09-21 11:23:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-21 11:23:07,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-09-21 11:23:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-21 11:23:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-09-21 11:23:07,531 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-09-21 11:23:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:07,531 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-09-21 11:23:07,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-09-21 11:23:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:23:07,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:07,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:07,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:23:07,533 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:07,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:07,534 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-09-21 11:23:07,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:07,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907747911] [2020-09-21 11:23:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:07,557 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:07,557 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:07,558 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:07,558 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:07,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:23:07,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:07,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:23:07,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:07,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:07,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:23:07,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:23:07,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:07,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:07,588 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:07,588 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:07,589 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:07,589 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:07,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:07,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:07,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:07,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:07,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:07,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:07,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:07,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:07,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907747911] [2020-09-21 11:23:07,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:07,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:07,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706810619] [2020-09-21 11:23:07,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:07,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:07,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:07,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:07,598 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-09-21 11:23:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:07,621 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-09-21 11:23:07,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:07,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 11:23:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:07,624 INFO L225 Difference]: With dead ends: 124 [2020-09-21 11:23:07,624 INFO L226 Difference]: Without dead ends: 122 [2020-09-21 11:23:07,625 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 [2020-09-21 11:23:07,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-21 11:23:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-09-21 11:23:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-21 11:23:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-09-21 11:23:07,638 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-09-21 11:23:07,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:07,638 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-09-21 11:23:07,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-09-21 11:23:07,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:23:07,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:07,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:07,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:23:07,641 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:07,641 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-09-21 11:23:07,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:07,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550148034] [2020-09-21 11:23:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:07,661 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:07,661 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:07,662 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:07,662 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:07,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:23:07,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:07,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:07,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:07,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:07,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:23:07,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:07,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:07,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:07,709 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:07,710 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:07,710 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:07,710 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:07,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:07,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:07,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:07,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:07,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:07,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:07,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:07,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:07,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550148034] [2020-09-21 11:23:07,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:07,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:07,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720582073] [2020-09-21 11:23:07,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:07,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:07,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:07,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:07,742 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-09-21 11:23:07,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:07,784 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-09-21 11:23:07,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:07,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 11:23:07,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:07,789 INFO L225 Difference]: With dead ends: 204 [2020-09-21 11:23:07,789 INFO L226 Difference]: Without dead ends: 124 [2020-09-21 11:23:07,790 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 [2020-09-21 11:23:07,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-21 11:23:07,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-09-21 11:23:07,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-21 11:23:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-09-21 11:23:07,804 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-09-21 11:23:07,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:07,804 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-09-21 11:23:07,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:07,805 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-09-21 11:23:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 11:23:07,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:07,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:07,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:23:07,807 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:07,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:07,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-09-21 11:23:07,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:07,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741433473] [2020-09-21 11:23:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:07,827 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:07,827 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:07,828 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:07,828 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:07,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:23:07,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:07,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:23:07,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:07,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:07,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:23:07,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:07,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:23:07,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:07,881 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:07,881 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:07,881 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:07,881 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:07,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:07,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:07,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:07,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:07,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:07,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:07,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:07,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:23:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:07,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741433473] [2020-09-21 11:23:07,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:07,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:07,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73054730] [2020-09-21 11:23:07,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:07,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:07,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:07,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:07,893 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-09-21 11:23:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:07,928 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-09-21 11:23:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:07,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 11:23:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:07,931 INFO L225 Difference]: With dead ends: 183 [2020-09-21 11:23:07,931 INFO L226 Difference]: Without dead ends: 126 [2020-09-21 11:23:07,932 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 [2020-09-21 11:23:07,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-21 11:23:07,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-09-21 11:23:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-21 11:23:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-09-21 11:23:07,944 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-09-21 11:23:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:07,945 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-09-21 11:23:07,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-09-21 11:23:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 11:23:07,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:07,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:07,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:23:07,947 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:07,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-09-21 11:23:07,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:07,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933806237] [2020-09-21 11:23:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:07,963 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:07,963 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:07,964 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:07,964 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:07,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:23:07,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:07,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:07,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:07,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:07,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:23:07,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:23:07,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:07,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:07,988 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:07,988 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:07,988 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:07,988 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:07,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:07,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:07,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:07,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:07,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:07,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:07,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:07,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:07,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933806237] [2020-09-21 11:23:07,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:07,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:07,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255856474] [2020-09-21 11:23:07,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:07,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:07,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:07,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:07,994 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-09-21 11:23:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:08,024 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-09-21 11:23:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:08,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 11:23:08,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:08,026 INFO L225 Difference]: With dead ends: 228 [2020-09-21 11:23:08,026 INFO L226 Difference]: Without dead ends: 226 [2020-09-21 11:23:08,027 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 [2020-09-21 11:23:08,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-09-21 11:23:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-09-21 11:23:08,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-21 11:23:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-09-21 11:23:08,043 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-09-21 11:23:08,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:08,043 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-09-21 11:23:08,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-09-21 11:23:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 11:23:08,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:08,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:08,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:23:08,046 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:08,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-09-21 11:23:08,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:08,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822585524] [2020-09-21 11:23:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,065 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,066 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,066 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,066 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:23:08,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:23:08,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:08,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:23:08,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:08,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:08,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,105 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,105 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,105 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,105 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:08,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:08,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:08,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:08,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:08,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:08,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822585524] [2020-09-21 11:23:08,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:08,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:08,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952129337] [2020-09-21 11:23:08,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:08,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:08,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:08,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:08,119 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-09-21 11:23:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:08,163 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-09-21 11:23:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:08,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 11:23:08,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:08,165 INFO L225 Difference]: With dead ends: 392 [2020-09-21 11:23:08,165 INFO L226 Difference]: Without dead ends: 234 [2020-09-21 11:23:08,166 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 [2020-09-21 11:23:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-21 11:23:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-09-21 11:23:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-09-21 11:23:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-09-21 11:23:08,182 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-09-21 11:23:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:08,182 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-09-21 11:23:08,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-09-21 11:23:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:23:08,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:08,184 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] [2020-09-21 11:23:08,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:23:08,185 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:08,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:08,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-09-21 11:23:08,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:08,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764192976] [2020-09-21 11:23:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,199 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,199 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,199 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,200 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:23:08,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:08,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:08,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:23:08,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:08,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:08,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,221 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,221 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,221 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,222 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:08,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:08,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:08,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:08,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:08,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:08,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764192976] [2020-09-21 11:23:08,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:08,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:08,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94843439] [2020-09-21 11:23:08,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:08,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:08,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:08,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:08,227 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-09-21 11:23:08,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:08,249 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-09-21 11:23:08,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:08,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 11:23:08,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:08,252 INFO L225 Difference]: With dead ends: 348 [2020-09-21 11:23:08,252 INFO L226 Difference]: Without dead ends: 238 [2020-09-21 11:23:08,253 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 [2020-09-21 11:23:08,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-21 11:23:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-09-21 11:23:08,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-09-21 11:23:08,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-09-21 11:23:08,269 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-09-21 11:23:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:08,270 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-09-21 11:23:08,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-09-21 11:23:08,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:23:08,275 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:08,275 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] [2020-09-21 11:23:08,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:23:08,276 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:08,276 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-09-21 11:23:08,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:08,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180982027] [2020-09-21 11:23:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,301 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,301 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,302 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,302 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:23:08,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:08,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:08,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 11:23:08,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:23:08,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:08,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,323 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,323 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,324 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,324 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:08,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:08,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:08,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:08,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:08,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:08,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180982027] [2020-09-21 11:23:08,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:08,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:08,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815666334] [2020-09-21 11:23:08,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:08,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:08,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:08,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:08,330 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-09-21 11:23:08,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:08,351 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-09-21 11:23:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:08,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 11:23:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:08,355 INFO L225 Difference]: With dead ends: 428 [2020-09-21 11:23:08,355 INFO L226 Difference]: Without dead ends: 426 [2020-09-21 11:23:08,355 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 [2020-09-21 11:23:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-09-21 11:23:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-09-21 11:23:08,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-09-21 11:23:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-09-21 11:23:08,371 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-09-21 11:23:08,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:08,373 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-09-21 11:23:08,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-09-21 11:23:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:23:08,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:08,382 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] [2020-09-21 11:23:08,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:23:08,382 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:08,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:08,383 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-09-21 11:23:08,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:08,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278148961] [2020-09-21 11:23:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,399 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,399 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,399 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,400 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:23:08,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:23:08,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:08,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 11:23:08,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:08,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:08,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,427 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,428 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,428 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,428 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:08,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:08,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:08,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:08,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278148961] [2020-09-21 11:23:08,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:08,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:08,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243149089] [2020-09-21 11:23:08,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:08,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:08,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:08,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:08,436 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-09-21 11:23:08,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:08,470 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-09-21 11:23:08,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:08,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 11:23:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:08,473 INFO L225 Difference]: With dead ends: 764 [2020-09-21 11:23:08,474 INFO L226 Difference]: Without dead ends: 450 [2020-09-21 11:23:08,475 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 [2020-09-21 11:23:08,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-09-21 11:23:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-09-21 11:23:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-09-21 11:23:08,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-09-21 11:23:08,491 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-09-21 11:23:08,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:08,492 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-09-21 11:23:08,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:08,492 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-09-21 11:23:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 11:23:08,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:08,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:08,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:23:08,494 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:08,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:08,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-09-21 11:23:08,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:08,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722005042] [2020-09-21 11:23:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,510 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,510 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,510 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,511 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:23:08,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:23:08,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:08,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 11:23:08,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:08,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:23:08,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,543 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,544 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,545 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,545 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:08,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:08,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:08,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:08,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:08,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722005042] [2020-09-21 11:23:08,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:08,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:08,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862354696] [2020-09-21 11:23:08,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:08,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:08,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:08,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:08,554 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-09-21 11:23:08,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:08,590 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-09-21 11:23:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:08,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 11:23:08,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:08,595 INFO L225 Difference]: With dead ends: 672 [2020-09-21 11:23:08,595 INFO L226 Difference]: Without dead ends: 458 [2020-09-21 11:23:08,596 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 [2020-09-21 11:23:08,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-09-21 11:23:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-09-21 11:23:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-09-21 11:23:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-09-21 11:23:08,617 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-09-21 11:23:08,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:08,618 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-09-21 11:23:08,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-09-21 11:23:08,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 11:23:08,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:08,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:08,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:23:08,622 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:08,622 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-09-21 11:23:08,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:08,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067798518] [2020-09-21 11:23:08,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,641 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,641 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,642 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,642 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:23:08,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:08,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:08,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 11:23:08,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:23:08,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:08,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,672 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,672 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,673 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,673 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:08,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:08,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:08,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:08,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:08,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:08,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067798518] [2020-09-21 11:23:08,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:08,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:08,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452373941] [2020-09-21 11:23:08,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:08,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:08,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:08,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:08,681 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-09-21 11:23:08,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:08,711 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-09-21 11:23:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:08,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 11:23:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:08,717 INFO L225 Difference]: With dead ends: 812 [2020-09-21 11:23:08,717 INFO L226 Difference]: Without dead ends: 810 [2020-09-21 11:23:08,717 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 [2020-09-21 11:23:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-09-21 11:23:08,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-09-21 11:23:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-09-21 11:23:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-09-21 11:23:08,740 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-09-21 11:23:08,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:08,741 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-09-21 11:23:08,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:08,741 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-09-21 11:23:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 11:23:08,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:08,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:08,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 11:23:08,743 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:08,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:08,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-09-21 11:23:08,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:08,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292535406] [2020-09-21 11:23:08,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,785 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,785 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,785 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,786 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:23:08,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:23:08,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:08,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 11:23:08,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:08,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:08,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,826 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,826 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,827 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,827 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:08,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:08,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:08,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:08,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:08,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:08,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292535406] [2020-09-21 11:23:08,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:08,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:08,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453885165] [2020-09-21 11:23:08,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:08,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:08,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:08,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:08,832 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-09-21 11:23:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:08,859 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-09-21 11:23:08,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:08,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 11:23:08,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:08,866 INFO L225 Difference]: With dead ends: 1500 [2020-09-21 11:23:08,866 INFO L226 Difference]: Without dead ends: 874 [2020-09-21 11:23:08,868 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 [2020-09-21 11:23:08,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-09-21 11:23:08,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-09-21 11:23:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-09-21 11:23:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-09-21 11:23:08,894 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-09-21 11:23:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:08,895 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-09-21 11:23:08,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-09-21 11:23:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:23:08,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:08,897 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] [2020-09-21 11:23:08,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 11:23:08,897 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:08,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:08,898 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-09-21 11:23:08,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:08,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049775444] [2020-09-21 11:23:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,911 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,912 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,912 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,912 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:23:08,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:08,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:08,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 11:23:08,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:08,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:08,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:08,929 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:08,929 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:08,929 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:08,929 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:08,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:08,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:08,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:08,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:08,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:08,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:08,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:08,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:08,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049775444] [2020-09-21 11:23:08,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:08,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:08,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554568615] [2020-09-21 11:23:08,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:08,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:08,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:08,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:08,936 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-09-21 11:23:08,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:08,965 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-09-21 11:23:08,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:08,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 11:23:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:08,970 INFO L225 Difference]: With dead ends: 1308 [2020-09-21 11:23:08,970 INFO L226 Difference]: Without dead ends: 890 [2020-09-21 11:23:08,974 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 [2020-09-21 11:23:08,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-09-21 11:23:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-09-21 11:23:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-09-21 11:23:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-09-21 11:23:09,001 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-09-21 11:23:09,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:09,001 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-09-21 11:23:09,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:09,001 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-09-21 11:23:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:23:09,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:09,004 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] [2020-09-21 11:23:09,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 11:23:09,004 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:09,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:09,004 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-09-21 11:23:09,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:09,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808675475] [2020-09-21 11:23:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:09,020 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:09,020 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:09,020 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:09,020 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:09,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:23:09,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:09,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:09,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:09,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:09,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 11:23:09,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:23:09,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:09,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:09,039 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:09,039 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:09,039 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:09,040 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:09,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:09,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:09,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:09,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:09,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:09,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:09,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:09,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:09,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808675475] [2020-09-21 11:23:09,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:09,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:09,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439631249] [2020-09-21 11:23:09,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:09,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:09,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:09,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:09,051 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-09-21 11:23:09,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:09,100 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-09-21 11:23:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:09,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 11:23:09,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:09,112 INFO L225 Difference]: With dead ends: 1548 [2020-09-21 11:23:09,112 INFO L226 Difference]: Without dead ends: 1546 [2020-09-21 11:23:09,114 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 [2020-09-21 11:23:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-09-21 11:23:09,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-09-21 11:23:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-09-21 11:23:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-09-21 11:23:09,176 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-09-21 11:23:09,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:09,178 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-09-21 11:23:09,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:09,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-09-21 11:23:09,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:23:09,181 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:09,181 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] [2020-09-21 11:23:09,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 11:23:09,182 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:09,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:09,183 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-09-21 11:23:09,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:09,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173622731] [2020-09-21 11:23:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:09,196 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:09,196 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:09,196 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:09,197 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:09,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:23:09,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:09,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:09,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:09,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:09,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 11:23:09,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:09,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:09,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:09,222 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:09,222 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:09,222 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:09,223 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:09,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:09,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:09,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:09,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:09,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:09,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:09,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:09,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:09,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173622731] [2020-09-21 11:23:09,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:09,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:09,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004224556] [2020-09-21 11:23:09,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:09,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:09,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:09,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:09,232 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-09-21 11:23:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:09,293 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-09-21 11:23:09,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:09,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 11:23:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:09,303 INFO L225 Difference]: With dead ends: 2956 [2020-09-21 11:23:09,304 INFO L226 Difference]: Without dead ends: 1706 [2020-09-21 11:23:09,308 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 [2020-09-21 11:23:09,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-09-21 11:23:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-09-21 11:23:09,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-09-21 11:23:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-09-21 11:23:09,371 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-09-21 11:23:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:09,371 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-09-21 11:23:09,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-09-21 11:23:09,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:23:09,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:09,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:09,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 11:23:09,376 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:09,376 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-09-21 11:23:09,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:09,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916114864] [2020-09-21 11:23:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:09,389 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:09,390 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:09,390 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:09,390 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:09,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 11:23:09,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:09,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:09,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:09,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:09,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 11:23:09,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:09,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:09,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:09,415 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:09,415 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:09,415 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:09,415 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:09,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:09,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:09,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:09,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:09,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:09,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:09,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:09,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:09,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916114864] [2020-09-21 11:23:09,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:09,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:09,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491833687] [2020-09-21 11:23:09,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:09,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:09,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:09,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:09,426 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-09-21 11:23:09,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:09,490 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-09-21 11:23:09,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:09,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 11:23:09,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:09,500 INFO L225 Difference]: With dead ends: 2556 [2020-09-21 11:23:09,500 INFO L226 Difference]: Without dead ends: 1738 [2020-09-21 11:23:09,502 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 [2020-09-21 11:23:09,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-09-21 11:23:09,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-09-21 11:23:09,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-09-21 11:23:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-09-21 11:23:09,558 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-09-21 11:23:09,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:09,558 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-09-21 11:23:09,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-09-21 11:23:09,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:23:09,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:09,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:09,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 11:23:09,562 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:09,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:09,562 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-09-21 11:23:09,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:09,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701304945] [2020-09-21 11:23:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:09,577 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:09,577 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:09,577 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:09,578 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:09,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 11:23:09,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:09,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:09,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:09,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:09,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 11:23:09,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:23:09,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:09,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:09,598 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:09,598 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:09,599 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:09,599 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:09,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:09,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:09,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:09,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:09,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:09,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:09,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:09,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:09,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701304945] [2020-09-21 11:23:09,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:09,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:09,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586469441] [2020-09-21 11:23:09,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:09,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:09,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:09,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:09,606 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-09-21 11:23:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:09,665 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-09-21 11:23:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:09,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 11:23:09,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:09,684 INFO L225 Difference]: With dead ends: 2956 [2020-09-21 11:23:09,684 INFO L226 Difference]: Without dead ends: 2954 [2020-09-21 11:23:09,686 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 [2020-09-21 11:23:09,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-09-21 11:23:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-09-21 11:23:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-09-21 11:23:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-09-21 11:23:09,799 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-09-21 11:23:09,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:09,800 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-09-21 11:23:09,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:09,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-09-21 11:23:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:23:09,807 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:09,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:09,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 11:23:09,808 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:09,809 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-09-21 11:23:09,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:09,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703161387] [2020-09-21 11:23:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:09,825 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:09,825 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:09,825 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:09,826 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:09,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 11:23:09,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:09,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:09,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:09,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:09,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 11:23:09,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:09,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:09,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:09,848 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:09,850 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:09,850 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:09,851 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:09,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:09,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:09,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:09,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:09,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:09,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:09,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:09,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:09,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703161387] [2020-09-21 11:23:09,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:09,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:09,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088640978] [2020-09-21 11:23:09,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:09,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:09,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:09,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:09,856 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-09-21 11:23:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:09,961 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-09-21 11:23:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:09,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 11:23:09,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:09,981 INFO L225 Difference]: With dead ends: 5836 [2020-09-21 11:23:09,981 INFO L226 Difference]: Without dead ends: 3338 [2020-09-21 11:23:09,987 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 [2020-09-21 11:23:09,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-09-21 11:23:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-09-21 11:23:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-09-21 11:23:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-09-21 11:23:10,142 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-09-21 11:23:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:10,143 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-09-21 11:23:10,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-09-21 11:23:10,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:23:10,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:10,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:10,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 11:23:10,153 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:10,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:10,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-09-21 11:23:10,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:10,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386517341] [2020-09-21 11:23:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:10,168 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:10,168 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:10,169 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:10,169 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:10,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 11:23:10,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:10,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:23:10,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 11:23:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:10,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:10,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:10,192 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:10,192 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:10,193 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:10,193 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:10,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:10,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:10,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:10,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:10,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:10,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386517341] [2020-09-21 11:23:10,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:10,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:10,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649776812] [2020-09-21 11:23:10,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:10,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:10,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:10,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:10,198 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-09-21 11:23:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:10,257 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-09-21 11:23:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:10,258 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 11:23:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:10,273 INFO L225 Difference]: With dead ends: 5004 [2020-09-21 11:23:10,273 INFO L226 Difference]: Without dead ends: 3402 [2020-09-21 11:23:10,277 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 [2020-09-21 11:23:10,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-09-21 11:23:10,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-09-21 11:23:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-09-21 11:23:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-09-21 11:23:10,377 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-09-21 11:23:10,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:10,378 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-09-21 11:23:10,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:10,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-09-21 11:23:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:23:10,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:10,383 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] [2020-09-21 11:23:10,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 11:23:10,383 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:10,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:10,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-09-21 11:23:10,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:10,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736347059] [2020-09-21 11:23:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:10,397 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:10,398 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:10,398 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:10,398 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:10,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 11:23:10,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:10,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:10,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:10,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:10,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 11:23:10,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:10,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:10,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:10,418 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:10,419 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:10,420 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:10,420 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:10,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:10,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:10,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:10,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:10,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:10,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:10,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:10,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:10,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736347059] [2020-09-21 11:23:10,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:10,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:10,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675541582] [2020-09-21 11:23:10,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:10,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:10,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:10,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:10,427 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-09-21 11:23:10,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:10,526 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-09-21 11:23:10,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:10,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 11:23:10,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:10,577 INFO L225 Difference]: With dead ends: 9804 [2020-09-21 11:23:10,577 INFO L226 Difference]: Without dead ends: 6538 [2020-09-21 11:23:10,586 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 [2020-09-21 11:23:10,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-09-21 11:23:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-09-21 11:23:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-09-21 11:23:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-09-21 11:23:10,849 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-09-21 11:23:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:10,850 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-09-21 11:23:10,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-09-21 11:23:10,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:23:10,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:10,858 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] [2020-09-21 11:23:10,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 11:23:10,859 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:10,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-09-21 11:23:10,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:10,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156422889] [2020-09-21 11:23:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:10,873 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:10,874 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:10,874 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:10,874 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:10,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 11:23:10,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:10,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:10,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:10,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:10,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 11:23:10,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:23:10,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:10,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:10,893 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:10,893 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:10,893 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:10,893 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:10,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:10,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:10,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:10,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:10,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:10,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:10,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:10,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:10,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156422889] [2020-09-21 11:23:10,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:10,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:10,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285902317] [2020-09-21 11:23:10,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:10,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:10,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:10,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:10,902 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-09-21 11:23:11,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:11,013 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-09-21 11:23:11,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:11,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 11:23:11,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:11,030 INFO L225 Difference]: With dead ends: 7052 [2020-09-21 11:23:11,030 INFO L226 Difference]: Without dead ends: 7050 [2020-09-21 11:23:11,034 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 [2020-09-21 11:23:11,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-09-21 11:23:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-09-21 11:23:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-09-21 11:23:11,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-09-21 11:23:11,208 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-09-21 11:23:11,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:11,209 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-09-21 11:23:11,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-09-21 11:23:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 11:23:11,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:11,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:11,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 11:23:11,223 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:11,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:11,223 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-09-21 11:23:11,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:11,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177127993] [2020-09-21 11:23:11,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:11,234 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:11,234 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:11,234 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:11,234 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:11,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:23:11,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:11,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:11,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:11,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 11:23:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:23:11,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:11,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:11,251 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:11,252 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:11,252 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:11,252 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:11,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:11,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:11,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:11,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:11,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:11,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:11,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:11,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:11,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177127993] [2020-09-21 11:23:11,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:11,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:11,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094682935] [2020-09-21 11:23:11,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:11,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:11,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:11,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:11,257 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-09-21 11:23:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:11,470 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-09-21 11:23:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:11,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-09-21 11:23:11,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:11,490 INFO L225 Difference]: With dead ends: 10634 [2020-09-21 11:23:11,491 INFO L226 Difference]: Without dead ends: 10632 [2020-09-21 11:23:11,494 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 [2020-09-21 11:23:11,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-09-21 11:23:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-09-21 11:23:11,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-09-21 11:23:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-09-21 11:23:11,695 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-09-21 11:23:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:11,695 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-09-21 11:23:11,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-09-21 11:23:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 11:23:11,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:11,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:11,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 11:23:11,712 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:11,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-09-21 11:23:11,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:11,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186817228] [2020-09-21 11:23:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:11,723 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:11,723 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:11,723 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:11,723 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:11,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:23:11,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:11,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:11,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:11,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:11,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 11:23:11,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:11,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:11,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:11,740 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:11,741 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:11,741 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:11,741 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:11,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:23:11,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:11,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:11,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:11,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:11,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:11,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:11,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:11,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186817228] [2020-09-21 11:23:11,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:11,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:11,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551035111] [2020-09-21 11:23:11,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:11,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:11,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:11,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:11,746 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-09-21 11:23:11,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:11,929 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-09-21 11:23:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:11,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-09-21 11:23:11,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:11,930 INFO L225 Difference]: With dead ends: 22664 [2020-09-21 11:23:11,930 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:23:12,067 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 [2020-09-21 11:23:12,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:23:12,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:23:12,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:23:12,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:23:12,068 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-09-21 11:23:12,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:12,069 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:23:12,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:12,069 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:23:12,069 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:23:12,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 11:23:12,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:23:12,111 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 11:23:12,111 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:23:12,111 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:23:12,112 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:23:12,112 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:23:12,112 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:23:12,112 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,112 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-09-21 11:23:12,112 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,112 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-09-21 11:23:12,112 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,113 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-09-21 11:23:12,113 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,113 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-09-21 11:23:12,113 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,113 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,113 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-09-21 11:23:12,113 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-09-21 11:23:12,114 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-09-21 11:23:12,114 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,114 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-09-21 11:23:12,114 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,114 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-09-21 11:23:12,114 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-09-21 11:23:12,115 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-09-21 11:23:12,115 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-09-21 11:23:12,115 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,115 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,115 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,115 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-09-21 11:23:12,115 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,115 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,116 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-09-21 11:23:12,116 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-09-21 11:23:12,116 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-09-21 11:23:12,116 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,116 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,116 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-09-21 11:23:12,116 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-09-21 11:23:12,117 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,117 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-09-21 11:23:12,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:23:12 BoogieIcfgContainer [2020-09-21 11:23:12,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:23:12,146 INFO L168 Benchmark]: Toolchain (without parser) took 6481.16 ms. Allocated memory was 140.0 MB in the beginning and 358.1 MB in the end (delta: 218.1 MB). Free memory was 102.0 MB in the beginning and 261.6 MB in the end (delta: -159.6 MB). Peak memory consumption was 58.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:12,147 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 11:23:12,148 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.96 ms. Allocated memory is still 140.0 MB. Free memory was 101.3 MB in the beginning and 90.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:12,148 INFO L168 Benchmark]: Boogie Preprocessor took 127.62 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 90.8 MB in the beginning and 180.5 MB in the end (delta: -89.6 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:12,151 INFO L168 Benchmark]: RCFGBuilder took 452.32 ms. Allocated memory is still 202.9 MB. Free memory was 180.5 MB in the beginning and 162.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:12,155 INFO L168 Benchmark]: TraceAbstraction took 5558.33 ms. Allocated memory was 202.9 MB in the beginning and 358.1 MB in the end (delta: 155.2 MB). Free memory was 161.5 MB in the beginning and 261.6 MB in the end (delta: -100.1 MB). Peak memory consumption was 55.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:12,158 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 332.96 ms. Allocated memory is still 140.0 MB. Free memory was 101.3 MB in the beginning and 90.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.62 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 90.8 MB in the beginning and 180.5 MB in the end (delta: -89.6 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 452.32 ms. Allocated memory is still 202.9 MB. Free memory was 180.5 MB in the beginning and 162.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5558.33 ms. Allocated memory was 202.9 MB in the beginning and 358.1 MB in the end (delta: 155.2 MB). Free memory was 161.5 MB in the beginning and 261.6 MB in the end (delta: -100.1 MB). Peak memory consumption was 55.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.4s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...