/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 --rcfgbuilder.size.of.a.code.block SingleStatement --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/loops-crafted-1/mono-crafted_12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:12:04,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:12:04,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:12:04,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:12:04,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:12:04,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:12:04,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:12:04,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:12:04,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:12:04,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:12:04,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:12:04,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:12:04,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:12:04,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:12:04,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:12:04,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:12:04,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:12:04,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:12:04,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:12:04,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:12:04,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:12:04,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:12:04,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:12:04,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:12:04,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:12:04,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:12:04,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:12:04,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:12:04,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:12:04,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:12:04,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:12:04,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:12:04,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:12:04,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:12:04,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:12:04,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:12:04,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:12:04,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:12:04,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:12:04,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:12:04,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:12:04,212 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 [2020-09-24 16:12:04,238 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:12:04,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:12:04,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:12:04,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:12:04,240 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:12:04,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:12:04,241 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:12:04,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:12:04,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:12:04,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:12:04,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:12:04,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:12:04,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:12:04,242 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:12:04,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:12:04,242 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:12:04,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:12:04,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:12:04,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:12:04,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:12:04,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:12:04,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:12:04,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:12:04,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:12:04,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:12:04,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:12:04,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:12:04,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:12:04,245 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:12:04,245 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.rcfgbuilder: Size of a code block -> SingleStatement 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; [2020-09-24 16:12:04,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:12:04,744 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:12:04,750 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:12:04,752 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:12:04,754 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:12:04,755 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-09-24 16:12:04,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28997a3a3/78a5094954fb4eaa9416c523162d11b4/FLAGf63a2f5fc [2020-09-24 16:12:05,374 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:12:05,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-09-24 16:12:05,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28997a3a3/78a5094954fb4eaa9416c523162d11b4/FLAGf63a2f5fc [2020-09-24 16:12:05,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28997a3a3/78a5094954fb4eaa9416c523162d11b4 [2020-09-24 16:12:05,751 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:12:05,757 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:12:05,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:12:05,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:12:05,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:12:05,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:12:05" (1/1) ... [2020-09-24 16:12:05,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19f65ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:05, skipping insertion in model container [2020-09-24 16:12:05,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:12:05" (1/1) ... [2020-09-24 16:12:05,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:12:05,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:12:06,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:12:06,060 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:12:06,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:12:06,090 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:12:06,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:06 WrapperNode [2020-09-24 16:12:06,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:12:06,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:12:06,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:12:06,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:12:06,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:06" (1/1) ... [2020-09-24 16:12:06,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:06" (1/1) ... [2020-09-24 16:12:06,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:06" (1/1) ... [2020-09-24 16:12:06,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:06" (1/1) ... [2020-09-24 16:12:06,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:06" (1/1) ... [2020-09-24 16:12:06,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:06" (1/1) ... [2020-09-24 16:12:06,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:06" (1/1) ... [2020-09-24 16:12:06,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:12:06,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:12:06,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:12:06,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:12:06,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:06" (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 [2020-09-24 16:12:06,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:12:06,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:12:06,267 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 16:12:06,268 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:12:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:12:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 16:12:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:12:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:12:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:12:06,533 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:12:06,534 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 16:12:06,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:12:06 BoogieIcfgContainer [2020-09-24 16:12:06,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:12:06,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:12:06,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:12:06,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:12:06,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:12:05" (1/3) ... [2020-09-24 16:12:06,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a860806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:12:06, skipping insertion in model container [2020-09-24 16:12:06,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:12:06" (2/3) ... [2020-09-24 16:12:06,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a860806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:12:06, skipping insertion in model container [2020-09-24 16:12:06,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:12:06" (3/3) ... [2020-09-24 16:12:06,565 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_12.c [2020-09-24 16:12:06,578 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:12:06,587 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:12:06,606 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:12:06,633 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:12:06,634 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:12:06,634 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:12:06,634 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:12:06,634 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:12:06,634 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:12:06,635 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:12:06,635 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:12:06,653 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-09-24 16:12:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 16:12:06,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:06,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:06,660 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:06,667 INFO L82 PathProgramCache]: Analyzing trace with hash -103545344, now seen corresponding path program 1 times [2020-09-24 16:12:06,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:06,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527385389] [2020-09-24 16:12:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:06,780 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:06,781 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:06,781 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:06,781 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:06,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 16:12:06,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:06,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 16:12:06,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:06,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:06,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 16:12:06,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:06,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:06,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:06,810 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:06,810 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:06,811 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:06,811 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:06,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:06,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:06,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:06,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:06,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:06,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:06,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:06,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:06,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527385389] [2020-09-24 16:12:06,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:12:06,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 16:12:06,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669961342] [2020-09-24 16:12:06,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 16:12:06,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:06,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 16:12:06,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 16:12:06,849 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-09-24 16:12:06,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:06,877 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-09-24 16:12:06,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 16:12:06,879 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-24 16:12:06,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:06,889 INFO L225 Difference]: With dead ends: 37 [2020-09-24 16:12:06,889 INFO L226 Difference]: Without dead ends: 18 [2020-09-24 16:12:06,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 16:12:06,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-24 16:12:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-24 16:12:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-24 16:12:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-24 16:12:06,939 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2020-09-24 16:12:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:06,940 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-24 16:12:06,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 16:12:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-24 16:12:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 16:12:06,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:06,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:06,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:12:06,942 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:06,943 INFO L82 PathProgramCache]: Analyzing trace with hash -116474638, now seen corresponding path program 1 times [2020-09-24 16:12:06,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:06,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373925216] [2020-09-24 16:12:06,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:07,057 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:07,057 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:07,057 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:07,057 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:07,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 16:12:07,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:07,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-24 16:12:07,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:07,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:12:07,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 16:12:07,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 16:12:07,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:12:07,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:07,309 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:07,310 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:07,310 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:07,310 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:07,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:07,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:07,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:07,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:07,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 16:12:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:07,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373925216] [2020-09-24 16:12:07,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:12:07,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:12:07,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114330289] [2020-09-24 16:12:07,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:12:07,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:07,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:12:07,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:12:07,328 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-09-24 16:12:07,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:07,381 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-09-24 16:12:07,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:12:07,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-24 16:12:07,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:07,383 INFO L225 Difference]: With dead ends: 29 [2020-09-24 16:12:07,383 INFO L226 Difference]: Without dead ends: 24 [2020-09-24 16:12:07,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:12:07,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-24 16:12:07,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-24 16:12:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-24 16:12:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-09-24 16:12:07,391 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2020-09-24 16:12:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:07,392 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-09-24 16:12:07,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:12:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-09-24 16:12:07,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-24 16:12:07,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:07,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:07,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:12:07,394 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:07,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:07,395 INFO L82 PathProgramCache]: Analyzing trace with hash 518703018, now seen corresponding path program 1 times [2020-09-24 16:12:07,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:07,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171085085] [2020-09-24 16:12:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:07,414 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:07,414 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:07,415 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:07,415 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:07,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 16:12:07,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:07,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 16:12:07,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:07,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:12:07,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:07,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 16:12:07,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:12:07,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:07,464 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:07,464 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:07,464 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:07,465 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:07,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:07,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:07,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:07,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:07,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:07,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:07,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:07,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:07,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171085085] [2020-09-24 16:12:07,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:12:07,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 16:12:07,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696231389] [2020-09-24 16:12:07,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 16:12:07,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:07,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 16:12:07,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 16:12:07,473 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 3 states. [2020-09-24 16:12:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:07,496 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-09-24 16:12:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 16:12:07,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-09-24 16:12:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:07,498 INFO L225 Difference]: With dead ends: 38 [2020-09-24 16:12:07,498 INFO L226 Difference]: Without dead ends: 27 [2020-09-24 16:12:07,499 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 [2020-09-24 16:12:07,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-24 16:12:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-09-24 16:12:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-24 16:12:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-24 16:12:07,505 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2020-09-24 16:12:07,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:07,506 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-24 16:12:07,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 16:12:07,506 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-24 16:12:07,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-24 16:12:07,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:07,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:07,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:12:07,508 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:07,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:07,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1583915500, now seen corresponding path program 1 times [2020-09-24 16:12:07,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:07,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535796303] [2020-09-24 16:12:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:07,543 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:07,543 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:07,543 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:07,543 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:07,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 16:12:07,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:07,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 16:12:07,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:12:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 16:12:07,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:07,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:07,637 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:07,637 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:07,637 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:07,637 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:07,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:07,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:07,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:07,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:07,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:07,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:07,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:07,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 16:12:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:07,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535796303] [2020-09-24 16:12:07,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:07,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 16:12:07,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950625563] [2020-09-24 16:12:07,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:12:07,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:07,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:12:07,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:12:07,662 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-09-24 16:12:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:07,754 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-09-24 16:12:07,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 16:12:07,755 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-09-24 16:12:07,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:07,757 INFO L225 Difference]: With dead ends: 43 [2020-09-24 16:12:07,757 INFO L226 Difference]: Without dead ends: 32 [2020-09-24 16:12:07,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:12:07,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-24 16:12:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-09-24 16:12:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-24 16:12:07,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-09-24 16:12:07,783 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-09-24 16:12:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:07,786 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-09-24 16:12:07,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:12:07,786 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-09-24 16:12:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-24 16:12:07,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:07,787 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:07,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:12:07,788 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:07,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:07,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1774568982, now seen corresponding path program 2 times [2020-09-24 16:12:07,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:07,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759039362] [2020-09-24 16:12:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:07,875 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:07,876 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:07,876 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:07,876 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:07,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 16:12:07,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:07,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 16:12:07,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:07,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:12:07,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:07,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 16:12:07,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:08,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:08,032 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:08,032 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:08,032 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:08,033 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:08,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:08,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:08,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:08,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:08,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:08,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:08,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:08,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:08,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759039362] [2020-09-24 16:12:08,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:08,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 16:12:08,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256677814] [2020-09-24 16:12:08,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 16:12:08,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:08,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 16:12:08,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:12:08,046 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 7 states. [2020-09-24 16:12:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:08,188 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-09-24 16:12:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 16:12:08,189 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-24 16:12:08,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:08,191 INFO L225 Difference]: With dead ends: 48 [2020-09-24 16:12:08,191 INFO L226 Difference]: Without dead ends: 37 [2020-09-24 16:12:08,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:12:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-24 16:12:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-09-24 16:12:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-24 16:12:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-09-24 16:12:08,207 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-09-24 16:12:08,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:08,208 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-09-24 16:12:08,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 16:12:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-09-24 16:12:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 16:12:08,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:08,209 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:08,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:12:08,209 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:08,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:08,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1498764244, now seen corresponding path program 3 times [2020-09-24 16:12:08,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:08,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922727687] [2020-09-24 16:12:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:08,310 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:08,310 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:08,310 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:08,311 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:08,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 16:12:08,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:08,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-24 16:12:08,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:08,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:12:08,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:08,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 16:12:08,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:08,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:08,475 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:08,476 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:08,477 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:08,477 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:08,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:08,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:08,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:12:08,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:08,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:08,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:08,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:08,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:08,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922727687] [2020-09-24 16:12:08,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:08,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 16:12:08,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741497173] [2020-09-24 16:12:08,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 16:12:08,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:08,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 16:12:08,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:12:08,490 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 9 states. [2020-09-24 16:12:08,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:08,664 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-09-24 16:12:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 16:12:08,664 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-09-24 16:12:08,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:08,665 INFO L225 Difference]: With dead ends: 53 [2020-09-24 16:12:08,666 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 16:12:08,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:12:08,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 16:12:08,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-24 16:12:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 16:12:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-24 16:12:08,674 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2020-09-24 16:12:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:08,674 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-24 16:12:08,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 16:12:08,674 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-24 16:12:08,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 16:12:08,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:08,676 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:08,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:12:08,676 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:08,677 INFO L82 PathProgramCache]: Analyzing trace with hash -2020615126, now seen corresponding path program 4 times [2020-09-24 16:12:08,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:08,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709673711] [2020-09-24 16:12:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:08,731 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:08,732 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:08,732 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:08,732 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:08,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 16:12:08,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:08,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-24 16:12:08,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:08,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:12:08,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:08,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 16:12:08,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:08,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:08,895 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:08,895 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:08,896 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:08,896 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:08,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:08,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:08,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:08,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:08,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:08,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:08,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:08,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:12:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:08,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709673711] [2020-09-24 16:12:08,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:08,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 16:12:08,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089302042] [2020-09-24 16:12:08,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 16:12:08,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:08,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 16:12:08,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:12:08,907 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 11 states. [2020-09-24 16:12:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:09,167 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-09-24 16:12:09,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 16:12:09,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-09-24 16:12:09,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:09,168 INFO L225 Difference]: With dead ends: 58 [2020-09-24 16:12:09,169 INFO L226 Difference]: Without dead ends: 47 [2020-09-24 16:12:09,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:12:09,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-24 16:12:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-09-24 16:12:09,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-24 16:12:09,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-09-24 16:12:09,177 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2020-09-24 16:12:09,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:09,177 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-09-24 16:12:09,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 16:12:09,178 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-09-24 16:12:09,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 16:12:09,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:09,179 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:09,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:12:09,179 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:09,180 INFO L82 PathProgramCache]: Analyzing trace with hash -747955820, now seen corresponding path program 5 times [2020-09-24 16:12:09,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:09,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412563469] [2020-09-24 16:12:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:09,232 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:09,232 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:09,232 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:09,232 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:09,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 16:12:09,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:09,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-24 16:12:09,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:09,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:12:09,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:09,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 16:12:09,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:09,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:09,422 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:09,422 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:09,422 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:09,422 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:09,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:09,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:09,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:09,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:09,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:09,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:09,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:09,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:09,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412563469] [2020-09-24 16:12:09,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:09,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 16:12:09,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383164376] [2020-09-24 16:12:09,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 16:12:09,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:09,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 16:12:09,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 16:12:09,432 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 13 states. [2020-09-24 16:12:09,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:09,761 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-09-24 16:12:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 16:12:09,761 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-09-24 16:12:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:09,762 INFO L225 Difference]: With dead ends: 63 [2020-09-24 16:12:09,763 INFO L226 Difference]: Without dead ends: 52 [2020-09-24 16:12:09,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-09-24 16:12:09,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-24 16:12:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-09-24 16:12:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 16:12:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-09-24 16:12:09,771 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2020-09-24 16:12:09,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:09,771 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-09-24 16:12:09,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 16:12:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-09-24 16:12:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 16:12:09,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:09,773 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:09,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 16:12:09,774 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:09,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:09,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2064667030, now seen corresponding path program 6 times [2020-09-24 16:12:09,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:09,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634103216] [2020-09-24 16:12:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:09,882 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:09,882 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:09,882 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:09,883 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:09,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 16:12:09,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:09,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-09-24 16:12:09,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:09,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 16:12:09,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:09,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 16:12:09,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:10,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:10,149 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:10,149 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:10,149 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:10,149 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:10,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:10,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:10,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:10,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:10,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:10,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:10,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:10,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 25 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:10,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634103216] [2020-09-24 16:12:10,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:10,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 16:12:10,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063654527] [2020-09-24 16:12:10,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 16:12:10,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:10,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 16:12:10,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:12:10,166 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 15 states. [2020-09-24 16:12:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:10,582 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-09-24 16:12:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 16:12:10,583 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-09-24 16:12:10,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:10,584 INFO L225 Difference]: With dead ends: 68 [2020-09-24 16:12:10,584 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 16:12:10,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-09-24 16:12:10,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 16:12:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-09-24 16:12:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 16:12:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-09-24 16:12:10,591 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2020-09-24 16:12:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:10,592 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-09-24 16:12:10,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 16:12:10,592 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-09-24 16:12:10,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 16:12:10,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:10,593 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:10,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 16:12:10,594 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:10,594 INFO L82 PathProgramCache]: Analyzing trace with hash 542420820, now seen corresponding path program 7 times [2020-09-24 16:12:10,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:10,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091080383] [2020-09-24 16:12:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:10,700 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:10,701 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:10,701 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:10,701 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:10,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 16:12:10,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:10,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-09-24 16:12:10,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:10,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 16:12:10,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:10,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 16:12:10,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:11,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:11,010 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:11,011 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:11,011 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:11,011 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:11,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:11,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:11,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:11,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:11,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:11,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:11,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:11,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 29 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:11,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091080383] [2020-09-24 16:12:11,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:11,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 16:12:11,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091798550] [2020-09-24 16:12:11,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 16:12:11,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:11,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 16:12:11,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-24 16:12:11,021 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 17 states. [2020-09-24 16:12:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:11,622 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-09-24 16:12:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 16:12:11,623 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-09-24 16:12:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:11,624 INFO L225 Difference]: With dead ends: 73 [2020-09-24 16:12:11,624 INFO L226 Difference]: Without dead ends: 62 [2020-09-24 16:12:11,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2020-09-24 16:12:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-24 16:12:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-09-24 16:12:11,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 16:12:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-09-24 16:12:11,640 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2020-09-24 16:12:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:11,640 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-09-24 16:12:11,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 16:12:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-09-24 16:12:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 16:12:11,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:11,643 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:11,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 16:12:11,643 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:11,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:11,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1801302186, now seen corresponding path program 8 times [2020-09-24 16:12:11,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:11,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377241723] [2020-09-24 16:12:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:11,735 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:11,735 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:11,736 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:11,736 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:11,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 16:12:11,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:11,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-24 16:12:11,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 16:12:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-24 16:12:11,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:12,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:12,089 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:12,089 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:12,090 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:12,090 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:12,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:12,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:12,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:12,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:12,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:12,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:12,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:12,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 33 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:12,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377241723] [2020-09-24 16:12:12,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:12,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 16:12:12,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740645415] [2020-09-24 16:12:12,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 16:12:12,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:12,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 16:12:12,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:12:12,111 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 19 states. [2020-09-24 16:12:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:12,885 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-09-24 16:12:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 16:12:12,885 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 58 [2020-09-24 16:12:12,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:12,886 INFO L225 Difference]: With dead ends: 78 [2020-09-24 16:12:12,886 INFO L226 Difference]: Without dead ends: 67 [2020-09-24 16:12:12,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 16:12:12,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-24 16:12:12,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-09-24 16:12:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-24 16:12:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-09-24 16:12:12,894 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2020-09-24 16:12:12,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:12,895 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-09-24 16:12:12,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 16:12:12,895 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-09-24 16:12:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 16:12:12,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:12,896 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:12,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 16:12:12,896 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:12,897 INFO L82 PathProgramCache]: Analyzing trace with hash -443673324, now seen corresponding path program 9 times [2020-09-24 16:12:12,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:12,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752988596] [2020-09-24 16:12:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:12,986 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:12,986 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:12,986 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:12,987 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:12,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-24 16:12:12,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:12,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-24 16:12:12,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:12,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 16:12:12,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:12,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 16:12:12,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:13,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:13,419 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:13,420 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:13,420 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:13,420 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:13,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:13,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:13,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:13,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:13,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:13,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:13,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:13,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 37 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:13,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752988596] [2020-09-24 16:12:13,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:13,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 16:12:13,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975121350] [2020-09-24 16:12:13,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 16:12:13,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:13,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 16:12:13,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-09-24 16:12:13,432 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 21 states. [2020-09-24 16:12:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:14,458 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-09-24 16:12:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 16:12:14,459 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 63 [2020-09-24 16:12:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:14,460 INFO L225 Difference]: With dead ends: 83 [2020-09-24 16:12:14,460 INFO L226 Difference]: Without dead ends: 72 [2020-09-24 16:12:14,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 16:12:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-24 16:12:14,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-09-24 16:12:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 16:12:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-24 16:12:14,468 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2020-09-24 16:12:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:14,469 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-24 16:12:14,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 16:12:14,469 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-24 16:12:14,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-24 16:12:14,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:14,470 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:14,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 16:12:14,471 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:14,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:14,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1562516758, now seen corresponding path program 10 times [2020-09-24 16:12:14,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:14,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049991589] [2020-09-24 16:12:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:14,654 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:14,654 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:14,654 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:14,654 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:14,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-24 16:12:14,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:14,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-09-24 16:12:14,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 16:12:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-24 16:12:14,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:15,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:15,104 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:15,104 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:15,104 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:15,105 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:15,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:15,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:15,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:15,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:15,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:15,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:15,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:15,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 41 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:15,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049991589] [2020-09-24 16:12:15,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:15,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 16:12:15,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027430775] [2020-09-24 16:12:15,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 16:12:15,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:15,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 16:12:15,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-09-24 16:12:15,118 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 23 states. [2020-09-24 16:12:16,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:16,241 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-09-24 16:12:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 16:12:16,242 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 68 [2020-09-24 16:12:16,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:16,243 INFO L225 Difference]: With dead ends: 88 [2020-09-24 16:12:16,243 INFO L226 Difference]: Without dead ends: 77 [2020-09-24 16:12:16,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 16:12:16,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-24 16:12:16,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2020-09-24 16:12:16,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-24 16:12:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-09-24 16:12:16,265 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 68 [2020-09-24 16:12:16,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:16,265 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-09-24 16:12:16,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 16:12:16,265 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-09-24 16:12:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 16:12:16,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:16,267 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:16,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 16:12:16,267 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:16,267 INFO L82 PathProgramCache]: Analyzing trace with hash 496192212, now seen corresponding path program 11 times [2020-09-24 16:12:16,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:16,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191228410] [2020-09-24 16:12:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:16,395 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:16,396 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:16,396 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:16,396 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:16,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-24 16:12:16,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:16,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-09-24 16:12:16,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:16,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 16:12:16,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:16,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-24 16:12:16,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:16,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:16,898 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:16,899 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:16,899 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:16,899 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:16,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:16,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:16,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-24 16:12:16,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:16,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:16,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:16,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:16,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:16,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191228410] [2020-09-24 16:12:16,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:16,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 16:12:16,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879852530] [2020-09-24 16:12:16,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 16:12:16,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:16,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 16:12:16,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-09-24 16:12:16,913 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 25 states. [2020-09-24 16:12:18,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:18,338 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-09-24 16:12:18,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 16:12:18,339 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-09-24 16:12:18,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:18,340 INFO L225 Difference]: With dead ends: 93 [2020-09-24 16:12:18,340 INFO L226 Difference]: Without dead ends: 82 [2020-09-24 16:12:18,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=168, Invalid=1994, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 16:12:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-24 16:12:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-09-24 16:12:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-24 16:12:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-09-24 16:12:18,348 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-09-24 16:12:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:18,349 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-09-24 16:12:18,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 16:12:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-09-24 16:12:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 16:12:18,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:18,350 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:18,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 16:12:18,351 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:18,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1584678186, now seen corresponding path program 12 times [2020-09-24 16:12:18,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:18,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652394228] [2020-09-24 16:12:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:18,495 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:18,496 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:18,496 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:18,496 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:18,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 16:12:18,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:18,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-09-24 16:12:18,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:18,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 16:12:18,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:18,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-24 16:12:18,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:19,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:19,079 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:19,079 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:19,079 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:19,080 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:19,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:19,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:19,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:19,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:19,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:19,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:19,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:19,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 49 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:19,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652394228] [2020-09-24 16:12:19,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:19,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 16:12:19,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819419892] [2020-09-24 16:12:19,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 16:12:19,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:19,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 16:12:19,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2020-09-24 16:12:19,097 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 27 states. [2020-09-24 16:12:20,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:20,597 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2020-09-24 16:12:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-24 16:12:20,600 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 78 [2020-09-24 16:12:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:20,601 INFO L225 Difference]: With dead ends: 98 [2020-09-24 16:12:20,601 INFO L226 Difference]: Without dead ends: 87 [2020-09-24 16:12:20,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=183, Invalid=2367, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 16:12:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-24 16:12:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-09-24 16:12:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 16:12:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-09-24 16:12:20,618 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 78 [2020-09-24 16:12:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:20,619 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-09-24 16:12:20,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 16:12:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-09-24 16:12:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-24 16:12:20,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:20,623 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:20,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 16:12:20,623 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:20,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:20,624 INFO L82 PathProgramCache]: Analyzing trace with hash -673165164, now seen corresponding path program 13 times [2020-09-24 16:12:20,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:20,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666630562] [2020-09-24 16:12:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:20,787 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:20,787 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:20,788 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:20,788 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:20,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-24 16:12:20,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:20,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-09-24 16:12:20,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 16:12:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-24 16:12:20,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:21,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:21,484 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:21,484 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:21,485 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:21,485 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:21,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:21,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:21,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:21,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:21,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:21,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:21,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:21,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 53 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:21,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666630562] [2020-09-24 16:12:21,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:21,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-24 16:12:21,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078761027] [2020-09-24 16:12:21,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-24 16:12:21,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:21,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-24 16:12:21,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2020-09-24 16:12:21,501 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 29 states. [2020-09-24 16:12:23,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:23,397 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2020-09-24 16:12:23,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-24 16:12:23,397 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2020-09-24 16:12:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:23,399 INFO L225 Difference]: With dead ends: 103 [2020-09-24 16:12:23,399 INFO L226 Difference]: Without dead ends: 92 [2020-09-24 16:12:23,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=198, Invalid=2772, Unknown=0, NotChecked=0, Total=2970 [2020-09-24 16:12:23,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-24 16:12:23,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-09-24 16:12:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-24 16:12:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-09-24 16:12:23,407 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2020-09-24 16:12:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:23,407 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-09-24 16:12:23,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-24 16:12:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-09-24 16:12:23,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-24 16:12:23,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:23,408 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:23,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 16:12:23,409 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:23,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:23,409 INFO L82 PathProgramCache]: Analyzing trace with hash -601565334, now seen corresponding path program 14 times [2020-09-24 16:12:23,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:23,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786351991] [2020-09-24 16:12:23,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:23,568 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:23,569 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:23,569 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:23,569 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:23,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-09-24 16:12:23,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:23,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-09-24 16:12:23,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:23,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 16:12:23,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:23,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-24 16:12:23,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:24,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:24,320 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:24,320 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:24,320 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:24,320 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:24,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:24,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:24,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:24,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:24,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:24,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:24,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:24,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 57 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:24,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786351991] [2020-09-24 16:12:24,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:24,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-24 16:12:24,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801807413] [2020-09-24 16:12:24,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-24 16:12:24,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:24,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-24 16:12:24,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2020-09-24 16:12:24,338 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 31 states. [2020-09-24 16:12:26,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:26,541 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-09-24 16:12:26,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-24 16:12:26,542 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 88 [2020-09-24 16:12:26,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:26,544 INFO L225 Difference]: With dead ends: 108 [2020-09-24 16:12:26,544 INFO L226 Difference]: Without dead ends: 97 [2020-09-24 16:12:26,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=213, Invalid=3209, Unknown=0, NotChecked=0, Total=3422 [2020-09-24 16:12:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-24 16:12:26,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-09-24 16:12:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-24 16:12:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-09-24 16:12:26,551 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2020-09-24 16:12:26,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:26,552 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-09-24 16:12:26,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-24 16:12:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-09-24 16:12:26,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-24 16:12:26,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:26,553 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:26,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 16:12:26,553 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:26,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:26,554 INFO L82 PathProgramCache]: Analyzing trace with hash -118413740, now seen corresponding path program 15 times [2020-09-24 16:12:26,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:26,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204845463] [2020-09-24 16:12:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:26,758 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:26,758 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:26,758 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:26,759 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:26,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 16:12:26,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:26,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-09-24 16:12:26,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 16:12:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-24 16:12:26,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:12:27,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:27,608 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:27,609 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:27,609 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:27,609 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:27,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:27,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:27,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:27,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:27,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:27,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:27,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:27,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 61 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:27,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204845463] [2020-09-24 16:12:27,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:27,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-24 16:12:27,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585321971] [2020-09-24 16:12:27,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-24 16:12:27,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:27,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-24 16:12:27,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 16:12:27,626 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2020-09-24 16:12:30,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:30,095 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-09-24 16:12:30,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-24 16:12:30,096 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 93 [2020-09-24 16:12:30,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:30,097 INFO L225 Difference]: With dead ends: 113 [2020-09-24 16:12:30,097 INFO L226 Difference]: Without dead ends: 102 [2020-09-24 16:12:30,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=228, Invalid=3678, Unknown=0, NotChecked=0, Total=3906 [2020-09-24 16:12:30,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-24 16:12:30,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-09-24 16:12:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 16:12:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-09-24 16:12:30,106 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2020-09-24 16:12:30,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:30,107 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-09-24 16:12:30,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-24 16:12:30,107 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-09-24 16:12:30,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-24 16:12:30,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:30,108 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:30,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 16:12:30,108 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:30,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:30,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1527539286, now seen corresponding path program 16 times [2020-09-24 16:12:30,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:30,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767101083] [2020-09-24 16:12:30,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:30,299 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:30,300 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:30,300 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:30,300 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:30,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-09-24 16:12:30,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:30,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-09-24 16:12:30,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:30,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 16:12:30,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:30,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-09-24 16:12:30,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:31,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:31,297 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:31,297 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:31,298 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:31,298 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:31,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:31,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:31,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:31,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:31,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:31,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:31,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:31,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 65 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:31,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767101083] [2020-09-24 16:12:31,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:31,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-24 16:12:31,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76581431] [2020-09-24 16:12:31,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-24 16:12:31,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:31,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-24 16:12:31,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 16:12:31,321 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 35 states. [2020-09-24 16:12:34,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:34,044 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-09-24 16:12:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-24 16:12:34,045 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2020-09-24 16:12:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:34,046 INFO L225 Difference]: With dead ends: 118 [2020-09-24 16:12:34,046 INFO L226 Difference]: Without dead ends: 107 [2020-09-24 16:12:34,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=243, Invalid=4179, Unknown=0, NotChecked=0, Total=4422 [2020-09-24 16:12:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-24 16:12:34,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-09-24 16:12:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-24 16:12:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-09-24 16:12:34,056 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 98 [2020-09-24 16:12:34,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:34,056 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-09-24 16:12:34,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-24 16:12:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-09-24 16:12:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-24 16:12:34,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:34,057 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:34,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 16:12:34,057 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:34,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:34,058 INFO L82 PathProgramCache]: Analyzing trace with hash -96351212, now seen corresponding path program 17 times [2020-09-24 16:12:34,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:34,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888251805] [2020-09-24 16:12:34,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:34,277 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:34,277 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:34,277 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:34,278 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:34,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-24 16:12:34,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:34,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-09-24 16:12:34,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:34,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-24 16:12:34,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:34,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-24 16:12:34,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:35,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:35,408 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:35,409 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:35,409 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:35,409 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:35,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:35,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:35,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:35,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:35,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:35,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:35,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:35,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 69 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:35,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888251805] [2020-09-24 16:12:35,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:35,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-24 16:12:35,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148390673] [2020-09-24 16:12:35,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-24 16:12:35,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:35,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-24 16:12:35,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 16:12:35,431 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 37 states. [2020-09-24 16:12:38,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:38,581 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2020-09-24 16:12:38,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-24 16:12:38,581 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 103 [2020-09-24 16:12:38,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:38,583 INFO L225 Difference]: With dead ends: 123 [2020-09-24 16:12:38,583 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 16:12:38,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=258, Invalid=4712, Unknown=0, NotChecked=0, Total=4970 [2020-09-24 16:12:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 16:12:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-09-24 16:12:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-24 16:12:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-09-24 16:12:38,591 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2020-09-24 16:12:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:38,591 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-09-24 16:12:38,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-24 16:12:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-09-24 16:12:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-24 16:12:38,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:38,593 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:38,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 16:12:38,593 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:38,593 INFO L82 PathProgramCache]: Analyzing trace with hash -857437206, now seen corresponding path program 18 times [2020-09-24 16:12:38,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:38,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308616150] [2020-09-24 16:12:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:38,833 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:38,833 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:38,833 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:38,833 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:38,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-09-24 16:12:38,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:38,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-09-24 16:12:38,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:38,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-24 16:12:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-09-24 16:12:38,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:40,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:40,043 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:40,044 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:40,044 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:40,044 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:40,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:40,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:40,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:40,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:40,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 73 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:40,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308616150] [2020-09-24 16:12:40,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:40,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-24 16:12:40,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945955161] [2020-09-24 16:12:40,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-24 16:12:40,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:40,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-24 16:12:40,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 16:12:40,073 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 39 states. [2020-09-24 16:12:43,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:43,494 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2020-09-24 16:12:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-24 16:12:43,497 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 108 [2020-09-24 16:12:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:43,498 INFO L225 Difference]: With dead ends: 128 [2020-09-24 16:12:43,498 INFO L226 Difference]: Without dead ends: 117 [2020-09-24 16:12:43,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=273, Invalid=5277, Unknown=0, NotChecked=0, Total=5550 [2020-09-24 16:12:43,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-24 16:12:43,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2020-09-24 16:12:43,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-24 16:12:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2020-09-24 16:12:43,506 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 108 [2020-09-24 16:12:43,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:43,506 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2020-09-24 16:12:43,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-24 16:12:43,507 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2020-09-24 16:12:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-24 16:12:43,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:43,508 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:43,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 16:12:43,508 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:43,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:43,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1437711916, now seen corresponding path program 19 times [2020-09-24 16:12:43,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:43,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338422835] [2020-09-24 16:12:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:43,783 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:43,784 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:43,784 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:43,784 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:43,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-09-24 16:12:43,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:43,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-09-24 16:12:43,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:43,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-09-24 16:12:43,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:43,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-24 16:12:43,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:45,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:45,346 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:45,347 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:45,347 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:45,347 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:45,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:45,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:45,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:45,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:45,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:45,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:45,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:45,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 77 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:45,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338422835] [2020-09-24 16:12:45,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:45,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-24 16:12:45,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143709732] [2020-09-24 16:12:45,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-24 16:12:45,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:45,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-24 16:12:45,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1542, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 16:12:45,378 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 41 states. [2020-09-24 16:12:49,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:49,189 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2020-09-24 16:12:49,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-24 16:12:49,194 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 113 [2020-09-24 16:12:49,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:49,195 INFO L225 Difference]: With dead ends: 133 [2020-09-24 16:12:49,195 INFO L226 Difference]: Without dead ends: 122 [2020-09-24 16:12:49,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=288, Invalid=5874, Unknown=0, NotChecked=0, Total=6162 [2020-09-24 16:12:49,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-24 16:12:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2020-09-24 16:12:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-24 16:12:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-09-24 16:12:49,203 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 113 [2020-09-24 16:12:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:49,203 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-09-24 16:12:49,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-24 16:12:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-09-24 16:12:49,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-24 16:12:49,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:49,205 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:49,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 16:12:49,205 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:49,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:49,205 INFO L82 PathProgramCache]: Analyzing trace with hash 855354922, now seen corresponding path program 20 times [2020-09-24 16:12:49,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:49,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194313551] [2020-09-24 16:12:49,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:49,491 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:49,491 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:49,491 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:49,491 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:49,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-09-24 16:12:49,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:49,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-09-24 16:12:49,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:49,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-09-24 16:12:49,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:49,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-09-24 16:12:49,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:50,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:50,962 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:50,962 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:50,962 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:50,963 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:50,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:50,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:50,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-24 16:12:50,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:50,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:50,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:50,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:50,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 81 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:50,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194313551] [2020-09-24 16:12:50,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:50,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-09-24 16:12:50,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688866914] [2020-09-24 16:12:50,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-24 16:12:50,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:50,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-24 16:12:50,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1703, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 16:12:50,987 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 43 states. [2020-09-24 16:12:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:12:55,319 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2020-09-24 16:12:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-24 16:12:55,320 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 118 [2020-09-24 16:12:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:12:55,321 INFO L225 Difference]: With dead ends: 138 [2020-09-24 16:12:55,321 INFO L226 Difference]: Without dead ends: 127 [2020-09-24 16:12:55,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=303, Invalid=6503, Unknown=0, NotChecked=0, Total=6806 [2020-09-24 16:12:55,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-24 16:12:55,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2020-09-24 16:12:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-24 16:12:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2020-09-24 16:12:55,329 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 118 [2020-09-24 16:12:55,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:12:55,330 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2020-09-24 16:12:55,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-24 16:12:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2020-09-24 16:12:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-09-24 16:12:55,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:12:55,331 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:12:55,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 16:12:55,332 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:12:55,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:12:55,332 INFO L82 PathProgramCache]: Analyzing trace with hash -325941356, now seen corresponding path program 21 times [2020-09-24 16:12:55,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:12:55,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597905791] [2020-09-24 16:12:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:12:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:55,667 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:12:55,668 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:55,668 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:55,668 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:55,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-09-24 16:12:55,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:55,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-09-24 16:12:55,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:55,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-09-24 16:12:55,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:12:55,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-09-24 16:12:55,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:57,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:12:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:12:57,305 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:12:57,305 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:12:57,305 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:12:57,305 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:12:57,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:12:57,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:12:57,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:12:57,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:12:57,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:12:57,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:12:57,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:12:57,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:12:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 85 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:12:57,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597905791] [2020-09-24 16:12:57,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:12:57,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-24 16:12:57,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872344090] [2020-09-24 16:12:57,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-24 16:12:57,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:12:57,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-24 16:12:57,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1872, Unknown=0, NotChecked=0, Total=1980 [2020-09-24 16:12:57,334 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 45 states. [2020-09-24 16:13:02,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:02,113 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-09-24 16:13:02,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-09-24 16:13:02,114 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 123 [2020-09-24 16:13:02,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:02,115 INFO L225 Difference]: With dead ends: 143 [2020-09-24 16:13:02,115 INFO L226 Difference]: Without dead ends: 132 [2020-09-24 16:13:02,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=318, Invalid=7164, Unknown=0, NotChecked=0, Total=7482 [2020-09-24 16:13:02,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-24 16:13:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-09-24 16:13:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-24 16:13:02,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-09-24 16:13:02,123 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2020-09-24 16:13:02,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:02,123 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-09-24 16:13:02,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-24 16:13:02,123 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-09-24 16:13:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-24 16:13:02,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:02,125 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:02,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 16:13:02,125 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:02,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:02,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1052966806, now seen corresponding path program 22 times [2020-09-24 16:13:02,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:02,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676862237] [2020-09-24 16:13:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:02,488 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 16:13:02,488 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:02,489 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:02,489 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:02,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-09-24 16:13:02,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:02,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-09-24 16:13:02,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:02,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-09-24 16:13:02,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:13:02,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-09-24 16:13:02,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1