/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:22:09,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:22:09,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:22:09,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:22:09,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:22:09,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:22:09,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:22:09,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:22:09,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:22:09,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:22:09,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:22:09,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:22:09,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:22:09,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:22:09,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:22:09,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:22:09,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:22:09,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:22:09,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:22:09,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:22:09,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:22:09,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:22:09,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:22:09,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:22:09,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:22:09,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:22:09,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:22:09,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:22:09,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:22:09,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 17:22:09,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:22:09,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:22:09,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:22:09,375 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 17:22:09,400 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:22:09,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:22:09,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:22:09,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:22:09,402 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:22:09,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:22:09,403 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:22:09,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:22:09,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:22:09,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:22:09,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:22:09,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:22:09,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:22:09,404 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:22:09,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:22:09,405 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:22:09,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:22:09,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:22:09,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:22:09,405 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:22:09,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:22:09,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:22:09,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:22:09,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:22:09,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:22:09,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:22:09,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:22:09,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:22:09,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:22:09,407 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;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;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;log-additional-information=true; [2020-09-24 17:22:09,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:22:09,885 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:22:09,889 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:22:09,893 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:22:09,893 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:22:09,895 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-24 17:22:09,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c643cacb0/01bee8fb26c946b38a7883d6bafe3fa5/FLAG577516c73 [2020-09-24 17:22:10,508 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:22:10,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-24 17:22:10,518 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c643cacb0/01bee8fb26c946b38a7883d6bafe3fa5/FLAG577516c73 [2020-09-24 17:22:10,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c643cacb0/01bee8fb26c946b38a7883d6bafe3fa5 [2020-09-24 17:22:10,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:22:10,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:22:10,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:22:10,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:22:10,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:22:10,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:22:10" (1/1) ... [2020-09-24 17:22:10,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@528baabb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:22:10, skipping insertion in model container [2020-09-24 17:22:10,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:22:10" (1/1) ... [2020-09-24 17:22:10,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:22:10,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:22:11,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:22:11,130 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:22:11,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:22:11,167 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:22:11,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:22:11 WrapperNode [2020-09-24 17:22:11,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:22:11,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:22:11,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:22:11,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:22:11,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:22:11" (1/1) ... [2020-09-24 17:22:11,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:22:11" (1/1) ... [2020-09-24 17:22:11,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:22:11" (1/1) ... [2020-09-24 17:22:11,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:22:11" (1/1) ... [2020-09-24 17:22:11,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:22:11" (1/1) ... [2020-09-24 17:22:11,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:22:11" (1/1) ... [2020-09-24 17:22:11,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:22:11" (1/1) ... [2020-09-24 17:22:11,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:22:11,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:22:11,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:22:11,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:22:11,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:22:11" (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 17:22:11,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:22:11,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:22:11,349 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 17:22:11,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 17:22:11,350 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:22:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:22:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 17:22:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 17:22:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 17:22:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:22:11,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:22:11,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:22:11,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:22:11,595 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:22:11,596 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 17:22:11,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:22:11 BoogieIcfgContainer [2020-09-24 17:22:11,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:22:11,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:22:11,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:22:11,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:22:11,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:22:10" (1/3) ... [2020-09-24 17:22:11,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d26714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:22:11, skipping insertion in model container [2020-09-24 17:22:11,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:22:11" (2/3) ... [2020-09-24 17:22:11,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d26714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:22:11, skipping insertion in model container [2020-09-24 17:22:11,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:22:11" (3/3) ... [2020-09-24 17:22:11,611 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-24 17:22:11,623 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:22:11,634 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:22:11,657 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:22:11,689 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:22:11,690 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:22:11,690 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:22:11,690 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:22:11,691 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:22:11,691 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:22:11,691 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:22:11,691 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:22:11,738 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-24 17:22:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 17:22:11,752 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:11,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:11,754 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:11,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:11,760 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-09-24 17:22:11,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:11,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397498437] [2020-09-24 17:22:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:11,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:11,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:11,957 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:11,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 17:22:11,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:22:11,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-24 17:22:11,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:11,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:11,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 17:22:11,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:11,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:11,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:11,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:11,991 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:11,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:11,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:11,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:22:11,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:11,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:11,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:11,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:11,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:11,999 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 17:22:12,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397498437] [2020-09-24 17:22:12,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:22:12,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 17:22:12,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399747648] [2020-09-24 17:22:12,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 17:22:12,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:12,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 17:22:12,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 17:22:12,031 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-24 17:22:12,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:12,060 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-24 17:22:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 17:22:12,062 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-24 17:22:12,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:12,072 INFO L225 Difference]: With dead ends: 41 [2020-09-24 17:22:12,072 INFO L226 Difference]: Without dead ends: 22 [2020-09-24 17:22:12,077 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 17:22:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-24 17:22:12,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-24 17:22:12,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 17:22:12,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-24 17:22:12,121 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2020-09-24 17:22:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:12,121 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-24 17:22:12,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 17:22:12,122 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-24 17:22:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-24 17:22:12,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:12,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:12,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:22:12,124 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:12,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:12,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1179723712, now seen corresponding path program 1 times [2020-09-24 17:22:12,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:12,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314064220] [2020-09-24 17:22:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:12,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:12,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:12,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:12,352 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:12,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 17:22:12,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:22:12,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-09-24 17:22:12,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:12,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:22:12,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:22:12,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 17:22:12,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:12,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:12,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:12,423 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:12,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:12,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:12,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:22:12,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:12,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:12,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:12,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:12,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:12,427 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 17:22:12,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314064220] [2020-09-24 17:22:12,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:22:12,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:22:12,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040404996] [2020-09-24 17:22:12,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:22:12,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:12,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:22:12,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:22:12,431 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2020-09-24 17:22:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:12,497 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-09-24 17:22:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:22:12,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-09-24 17:22:12,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:12,501 INFO L225 Difference]: With dead ends: 50 [2020-09-24 17:22:12,502 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 17:22:12,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:22:12,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 17:22:12,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-09-24 17:22:12,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-24 17:22:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-24 17:22:12,511 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-09-24 17:22:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:12,511 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-24 17:22:12,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:22:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-24 17:22:12,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 17:22:12,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:12,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:12,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:22:12,513 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:12,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1535220285, now seen corresponding path program 1 times [2020-09-24 17:22:12,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:12,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277797446] [2020-09-24 17:22:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:12,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:12,598 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:12,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 17:22:12,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:12,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-24 17:22:12,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:12,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:22:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:22:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:22:12,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:12,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:12,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:12,669 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:12,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:12,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:12,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:22:12,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:12,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:12,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:12,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:12,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:12,675 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 17:22:12,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277797446] [2020-09-24 17:22:12,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:22:12,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 17:22:12,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640858077] [2020-09-24 17:22:12,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:22:12,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:12,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:22:12,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:22:12,678 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-09-24 17:22:12,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:12,750 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-09-24 17:22:12,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:22:12,750 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-09-24 17:22:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:12,752 INFO L225 Difference]: With dead ends: 38 [2020-09-24 17:22:12,752 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 17:22:12,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:22:12,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 17:22:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-24 17:22:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 17:22:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-24 17:22:12,759 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2020-09-24 17:22:12,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:12,760 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-24 17:22:12,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:22:12,760 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-24 17:22:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 17:22:12,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:12,761 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:12,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:22:12,762 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:12,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:12,762 INFO L82 PathProgramCache]: Analyzing trace with hash 463086038, now seen corresponding path program 1 times [2020-09-24 17:22:12,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:12,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022998609] [2020-09-24 17:22:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:12,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:12,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:12,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:13,020 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:13,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:22:13,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:22:13,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-09-24 17:22:13,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:13,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:22:13,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:22:13,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 17:22:13,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:13,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:13,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:13,068 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:13,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:13,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:13,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:22:13,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:13,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:13,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:13,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022998609] [2020-09-24 17:22:13,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:13,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 17:22:13,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729450839] [2020-09-24 17:22:13,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:22:13,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:13,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:22:13,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:22:13,075 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-24 17:22:13,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:13,133 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-09-24 17:22:13,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:22:13,135 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-24 17:22:13,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:13,136 INFO L225 Difference]: With dead ends: 59 [2020-09-24 17:22:13,136 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 17:22:13,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:22:13,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 17:22:13,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-09-24 17:22:13,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-24 17:22:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-24 17:22:13,149 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2020-09-24 17:22:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:13,150 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-24 17:22:13,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:22:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-24 17:22:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 17:22:13,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:13,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:13,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:22:13,153 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:13,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:13,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1265709657, now seen corresponding path program 1 times [2020-09-24 17:22:13,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:13,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920545308] [2020-09-24 17:22:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:13,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:13,282 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:13,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 17:22:13,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:13,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-09-24 17:22:13,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:13,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:22:13,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:22:13,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 17:22:13,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:13,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:13,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:13,335 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:13,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:13,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:13,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:22:13,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:13,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:13,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:13,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:13,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:13,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920545308] [2020-09-24 17:22:13,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:13,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:22:13,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502675572] [2020-09-24 17:22:13,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:22:13,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:13,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:22:13,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:22:13,343 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-24 17:22:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:13,401 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-24 17:22:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 17:22:13,402 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-09-24 17:22:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:13,403 INFO L225 Difference]: With dead ends: 46 [2020-09-24 17:22:13,403 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 17:22:13,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:22:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 17:22:13,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-24 17:22:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 17:22:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-24 17:22:13,410 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2020-09-24 17:22:13,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:13,411 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-24 17:22:13,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:22:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-24 17:22:13,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 17:22:13,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:13,412 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:13,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:22:13,413 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:13,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1847206016, now seen corresponding path program 2 times [2020-09-24 17:22:13,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:13,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970923786] [2020-09-24 17:22:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:13,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:13,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:13,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:13,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:13,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:13,884 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:13,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 17:22:13,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:22:13,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-09-24 17:22:13,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:13,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:22:13,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:22:13,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 17:22:13,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:13,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:13,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:13,952 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:13,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:13,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:13,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:13,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:13,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:13,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:13,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970923786] [2020-09-24 17:22:13,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:13,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:22:13,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522424048] [2020-09-24 17:22:13,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:22:13,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:13,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:22:13,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:22:13,962 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2020-09-24 17:22:14,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:14,061 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-09-24 17:22:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 17:22:14,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-24 17:22:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:14,063 INFO L225 Difference]: With dead ends: 55 [2020-09-24 17:22:14,063 INFO L226 Difference]: Without dead ends: 48 [2020-09-24 17:22:14,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:22:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-24 17:22:14,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-09-24 17:22:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-24 17:22:14,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-09-24 17:22:14,071 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 33 [2020-09-24 17:22:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:14,072 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-09-24 17:22:14,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:22:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-09-24 17:22:14,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 17:22:14,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:14,073 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:14,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:22:14,074 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:14,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:14,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1451800455, now seen corresponding path program 3 times [2020-09-24 17:22:14,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:14,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402934743] [2020-09-24 17:22:14,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:14,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:14,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:14,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:14,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:14,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:15,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:15,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:15,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:15,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:15,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:15,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:15,860 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:15,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 17:22:15,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 17:22:15,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1775 [2020-09-24 17:22:15,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:15,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:22:15,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:22:15,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 17:22:15,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:15,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:15,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:15,976 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:15,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:15,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:15,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:22:15,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:15,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:15,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:15,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:15,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:15,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402934743] [2020-09-24 17:22:15,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:15,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 17:22:15,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37410546] [2020-09-24 17:22:15,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 17:22:15,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:15,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 17:22:15,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:22:15,988 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 11 states. [2020-09-24 17:22:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:16,163 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-09-24 17:22:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 17:22:16,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-09-24 17:22:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:16,165 INFO L225 Difference]: With dead ends: 64 [2020-09-24 17:22:16,165 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 17:22:16,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:22:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 17:22:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-09-24 17:22:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-24 17:22:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-09-24 17:22:16,178 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 40 [2020-09-24 17:22:16,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:16,179 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-09-24 17:22:16,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 17:22:16,179 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-09-24 17:22:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 17:22:16,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:16,183 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:16,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 17:22:16,185 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:16,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:16,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1286281632, now seen corresponding path program 4 times [2020-09-24 17:22:16,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:16,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332744959] [2020-09-24 17:22:16,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:16,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:16,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:16,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:16,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:16,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:16,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:16,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:17,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:17,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:18,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:18,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:18,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:19,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:19,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:19,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:20,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:20,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:20,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:20,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:20,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:21,297 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:21,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-24 17:22:21,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-09-24 17:22:21,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-09-24 17:22:21,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:21,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:22:21,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-24 17:22:21,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 17:22:21,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:21,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:21,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:21,319 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:21,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:21,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:21,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:21,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:21,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:21,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:21,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:21,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:22:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-09-24 17:22:21,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332744959] [2020-09-24 17:22:21,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:22:21,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:22:21,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889523512] [2020-09-24 17:22:21,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:22:21,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:21,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:22:21,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:22:21,329 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 3 states. [2020-09-24 17:22:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:21,347 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-09-24 17:22:21,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:22:21,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2020-09-24 17:22:21,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:21,348 INFO L225 Difference]: With dead ends: 82 [2020-09-24 17:22:21,348 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 17:22:21,349 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 17:22:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 17:22:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-24 17:22:21,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 17:22:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-09-24 17:22:21,359 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 47 [2020-09-24 17:22:21,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:21,361 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-09-24 17:22:21,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:22:21,362 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-09-24 17:22:21,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 17:22:21,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:21,363 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:21,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 17:22:21,363 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:21,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:21,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 5 times [2020-09-24 17:22:21,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:21,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063900141] [2020-09-24 17:22:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:21,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:21,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:21,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:22,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:22,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:22,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:22,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:22,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:22,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:22,650 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:22,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 17:22:22,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 17:22:22,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1270 [2020-09-24 17:22:22,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 17:22:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:22:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 17:22:22,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:22,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:22,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:22,803 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:22,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:22,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:22,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:22,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:22,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:22,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:22,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:22,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 17:22:22,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063900141] [2020-09-24 17:22:22,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:22,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 17:22:22,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276944258] [2020-09-24 17:22:22,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 17:22:22,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:22,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 17:22:22,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-09-24 17:22:22,814 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 13 states. [2020-09-24 17:22:23,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:23,103 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-09-24 17:22:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 17:22:23,103 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-09-24 17:22:23,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:23,104 INFO L225 Difference]: With dead ends: 78 [2020-09-24 17:22:23,104 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 17:22:23,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2020-09-24 17:22:23,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 17:22:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2020-09-24 17:22:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-24 17:22:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-09-24 17:22:23,112 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 51 [2020-09-24 17:22:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:23,112 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-09-24 17:22:23,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 17:22:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-09-24 17:22:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 17:22:23,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:23,114 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:23,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 17:22:23,114 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:23,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:23,115 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 2 times [2020-09-24 17:22:23,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:23,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727837130] [2020-09-24 17:22:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:23,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:23,331 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:23,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 17:22:23,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:23,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-09-24 17:22:23,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:23,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 17:22:23,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:22:23,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 17:22:23,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:23,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:23,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:23,491 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:23,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:23,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:23,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:23,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:23,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:23,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:23,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:23,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:23,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727837130] [2020-09-24 17:22:23,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:23,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 17:22:23,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256811043] [2020-09-24 17:22:23,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 17:22:23,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:23,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 17:22:23,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:22:23,526 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 12 states. [2020-09-24 17:22:23,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:23,746 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-09-24 17:22:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 17:22:23,746 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-09-24 17:22:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:23,747 INFO L225 Difference]: With dead ends: 74 [2020-09-24 17:22:23,748 INFO L226 Difference]: Without dead ends: 67 [2020-09-24 17:22:23,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-24 17:22:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-24 17:22:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-24 17:22:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 17:22:23,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-09-24 17:22:23,760 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 53 [2020-09-24 17:22:23,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:23,760 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-09-24 17:22:23,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 17:22:23,761 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-09-24 17:22:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 17:22:23,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:23,764 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:23,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 17:22:23,764 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:23,765 INFO L82 PathProgramCache]: Analyzing trace with hash -392261546, now seen corresponding path program 6 times [2020-09-24 17:22:23,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:23,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303384215] [2020-09-24 17:22:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:23,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:23,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:23,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:24,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:24,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:24,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:25,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:25,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:25,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:25,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:25,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:25,550 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:25,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 17:22:25,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 17:22:25,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1772 [2020-09-24 17:22:25,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:25,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 17:22:25,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:22:25,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-24 17:22:25,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:25,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:25,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:25,767 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:25,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:25,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:25,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:25,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:25,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:25,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:25,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:25,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:25,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303384215] [2020-09-24 17:22:25,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:25,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 17:22:25,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662467265] [2020-09-24 17:22:25,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 17:22:25,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:25,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 17:22:25,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:22:25,792 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 16 states. [2020-09-24 17:22:26,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:26,439 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-09-24 17:22:26,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 17:22:26,440 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-09-24 17:22:26,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:26,441 INFO L225 Difference]: With dead ends: 87 [2020-09-24 17:22:26,441 INFO L226 Difference]: Without dead ends: 79 [2020-09-24 17:22:26,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 17:22:26,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-24 17:22:26,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-09-24 17:22:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 17:22:26,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-09-24 17:22:26,448 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 60 [2020-09-24 17:22:26,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:26,448 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-09-24 17:22:26,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 17:22:26,448 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-09-24 17:22:26,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 17:22:26,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:26,449 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:26,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 17:22:26,450 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:26,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:26,450 INFO L82 PathProgramCache]: Analyzing trace with hash -384565031, now seen corresponding path program 3 times [2020-09-24 17:22:26,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:26,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187313355] [2020-09-24 17:22:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:26,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:26,725 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:26,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-24 17:22:26,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:26,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-09-24 17:22:26,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:26,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 17:22:26,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:22:26,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-09-24 17:22:26,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:26,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:26,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:26,921 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:26,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:26,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:26,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:26,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:26,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:26,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:26,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:26,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:26,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187313355] [2020-09-24 17:22:26,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:26,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 17:22:26,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003530696] [2020-09-24 17:22:26,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 17:22:26,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:26,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 17:22:26,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-24 17:22:26,938 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 15 states. [2020-09-24 17:22:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:27,198 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-09-24 17:22:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 17:22:27,199 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-09-24 17:22:27,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:27,199 INFO L225 Difference]: With dead ends: 83 [2020-09-24 17:22:27,200 INFO L226 Difference]: Without dead ends: 76 [2020-09-24 17:22:27,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-09-24 17:22:27,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-24 17:22:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-09-24 17:22:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-24 17:22:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-09-24 17:22:27,206 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 62 [2020-09-24 17:22:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:27,206 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-09-24 17:22:27,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 17:22:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-09-24 17:22:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 17:22:27,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:27,207 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:27,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 17:22:27,208 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1192623616, now seen corresponding path program 7 times [2020-09-24 17:22:27,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:27,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241066810] [2020-09-24 17:22:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:27,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:27,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:27,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:27,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:28,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:28,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:28,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:29,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:29,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:29,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:29,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:29,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:29,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:30,112 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:30,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 17:22:30,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 17:22:30,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2892 [2020-09-24 17:22:30,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:30,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 17:22:30,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:22:30,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-24 17:22:30,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:30,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:30,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:30,216 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:30,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:30,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:30,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:22:30,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:30,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 6 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:30,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241066810] [2020-09-24 17:22:30,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:30,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 17:22:30,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686191744] [2020-09-24 17:22:30,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 17:22:30,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:30,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 17:22:30,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:22:30,237 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 10 states. [2020-09-24 17:22:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:30,444 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-09-24 17:22:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 17:22:30,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-24 17:22:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:30,446 INFO L225 Difference]: With dead ends: 97 [2020-09-24 17:22:30,446 INFO L226 Difference]: Without dead ends: 89 [2020-09-24 17:22:30,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-09-24 17:22:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-24 17:22:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-24 17:22:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-24 17:22:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-09-24 17:22:30,466 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 69 [2020-09-24 17:22:30,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:30,467 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-09-24 17:22:30,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 17:22:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-09-24 17:22:30,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 17:22:30,469 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:30,472 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:30,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 17:22:30,472 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:30,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:30,473 INFO L82 PathProgramCache]: Analyzing trace with hash -733368317, now seen corresponding path program 4 times [2020-09-24 17:22:30,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:30,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279432749] [2020-09-24 17:22:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:30,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:30,880 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:30,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 17:22:30,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:30,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-09-24 17:22:30,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:30,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 17:22:30,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:22:30,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 17:22:30,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:31,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:31,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:31,124 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:31,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:31,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:31,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:31,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:31,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:31,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:31,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:31,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:31,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279432749] [2020-09-24 17:22:31,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:31,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 17:22:31,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150791845] [2020-09-24 17:22:31,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 17:22:31,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:31,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 17:22:31,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-24 17:22:31,149 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 17 states. [2020-09-24 17:22:31,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:31,568 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2020-09-24 17:22:31,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 17:22:31,569 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-09-24 17:22:31,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:31,570 INFO L225 Difference]: With dead ends: 92 [2020-09-24 17:22:31,570 INFO L226 Difference]: Without dead ends: 85 [2020-09-24 17:22:31,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-09-24 17:22:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-24 17:22:31,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-09-24 17:22:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-24 17:22:31,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-09-24 17:22:31,585 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 71 [2020-09-24 17:22:31,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:31,587 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-09-24 17:22:31,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 17:22:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-09-24 17:22:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 17:22:31,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:31,590 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:31,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 17:22:31,591 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:31,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1330458730, now seen corresponding path program 8 times [2020-09-24 17:22:31,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:31,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765066465] [2020-09-24 17:22:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:31,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:31,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:31,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:32,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:32,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:33,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:33,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:33,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:34,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:34,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:34,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:35,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:35,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:35,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:35,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:35,611 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:35,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 17:22:35,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-24 17:22:35,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3997 [2020-09-24 17:22:35,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:35,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 17:22:35,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:22:35,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-24 17:22:35,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:35,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:35,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:35,904 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:35,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:35,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:35,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:35,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:35,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:35,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765066465] [2020-09-24 17:22:35,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:35,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 17:22:35,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694058294] [2020-09-24 17:22:35,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 17:22:35,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:35,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 17:22:35,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-09-24 17:22:35,928 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 19 states. [2020-09-24 17:22:36,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:36,366 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2020-09-24 17:22:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 17:22:36,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-09-24 17:22:36,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:36,367 INFO L225 Difference]: With dead ends: 115 [2020-09-24 17:22:36,367 INFO L226 Difference]: Without dead ends: 103 [2020-09-24 17:22:36,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=719, Unknown=0, NotChecked=0, Total=930 [2020-09-24 17:22:36,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-24 17:22:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2020-09-24 17:22:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 17:22:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-09-24 17:22:36,376 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 78 [2020-09-24 17:22:36,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:36,377 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-09-24 17:22:36,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 17:22:36,377 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-09-24 17:22:36,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 17:22:36,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:36,378 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:36,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 17:22:36,379 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:36,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:36,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1953349334, now seen corresponding path program 9 times [2020-09-24 17:22:36,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:36,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680073393] [2020-09-24 17:22:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:36,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:36,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:36,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:38,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:38,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:38,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:39,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:39,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:39,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:39,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:40,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:40,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:40,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:40,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:41,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:41,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:41,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:41,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:42,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:42,339 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:42,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-24 17:22:42,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-24 17:22:42,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5946 [2020-09-24 17:22:42,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:42,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 17:22:42,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:22:42,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-24 17:22:42,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:42,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:42,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:42,748 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:42,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:42,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:42,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:42,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:42,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:42,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:42,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:42,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:42,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680073393] [2020-09-24 17:22:42,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:42,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 17:22:42,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254686134] [2020-09-24 17:22:42,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 17:22:42,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:42,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 17:22:42,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2020-09-24 17:22:42,764 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 25 states. [2020-09-24 17:22:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:44,147 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2020-09-24 17:22:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 17:22:44,147 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 96 [2020-09-24 17:22:44,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:44,149 INFO L225 Difference]: With dead ends: 123 [2020-09-24 17:22:44,149 INFO L226 Difference]: Without dead ends: 115 [2020-09-24 17:22:44,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=408, Invalid=2142, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 17:22:44,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-24 17:22:44,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2020-09-24 17:22:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-24 17:22:44,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-09-24 17:22:44,156 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 96 [2020-09-24 17:22:44,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:44,157 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-09-24 17:22:44,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 17:22:44,157 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-09-24 17:22:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-24 17:22:44,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:44,158 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:44,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 17:22:44,158 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1110339751, now seen corresponding path program 5 times [2020-09-24 17:22:44,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:44,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99574117] [2020-09-24 17:22:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:44,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:44,712 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:44,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-09-24 17:22:44,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:44,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 539 [2020-09-24 17:22:44,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:44,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 17:22:44,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:22:44,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-09-24 17:22:44,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:45,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:45,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:45,121 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:45,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:45,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:45,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:45,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:45,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:45,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:45,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:45,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:45,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99574117] [2020-09-24 17:22:45,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:45,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 17:22:45,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17679048] [2020-09-24 17:22:45,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 17:22:45,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:45,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 17:22:45,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-09-24 17:22:45,169 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 23 states. [2020-09-24 17:22:46,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:46,136 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2020-09-24 17:22:46,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 17:22:46,137 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 98 [2020-09-24 17:22:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:46,137 INFO L225 Difference]: With dead ends: 106 [2020-09-24 17:22:46,137 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 17:22:46,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=386, Invalid=1254, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 17:22:46,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 17:22:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 17:22:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 17:22:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 17:22:46,140 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2020-09-24 17:22:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:46,141 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 17:22:46,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 17:22:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 17:22:46,141 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 17:22:46,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 17:22:46,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 17:22:46,328 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 159 [2020-09-24 17:22:46,666 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 67 [2020-09-24 17:22:46,670 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 17:22:46,670 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 17:22:46,670 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 17:22:46,670 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 17:22:46,670 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 17:22:46,670 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 17:22:46,671 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-24 17:22:46,671 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-24 17:22:46,671 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-24 17:22:46,671 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-24 17:22:46,671 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-24 17:22:46,671 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 22) no Hoare annotation was computed. [2020-09-24 17:22:46,671 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-24 17:22:46,671 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-24 17:22:46,671 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 22) no Hoare annotation was computed. [2020-09-24 17:22:46,672 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 22) the Hoare annotation is: true [2020-09-24 17:22:46,672 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-24 17:22:46,672 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-24 17:22:46,672 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-24 17:22:46,672 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-24 17:22:46,672 INFO L268 CegarLoopResult]: For program point L16-3(line 16) no Hoare annotation was computed. [2020-09-24 17:22:46,672 INFO L268 CegarLoopResult]: For program point L16-5(lines 16 19) no Hoare annotation was computed. [2020-09-24 17:22:46,673 INFO L268 CegarLoopResult]: For program point L16-6(line 16) no Hoare annotation was computed. [2020-09-24 17:22:46,673 INFO L268 CegarLoopResult]: For program point L16-7(line 16) no Hoare annotation was computed. [2020-09-24 17:22:46,673 INFO L268 CegarLoopResult]: For program point L16-9(line 16) no Hoare annotation was computed. [2020-09-24 17:22:46,673 INFO L268 CegarLoopResult]: For program point L16-10(line 16) no Hoare annotation was computed. [2020-09-24 17:22:46,674 INFO L264 CegarLoopResult]: At program point L16-11(lines 16 19) the Hoare annotation is: (let ((.cse9 (* 4 main_~y~0)) (.cse4 (* 2 main_~y~0))) (let ((.cse3 (<= main_~x~0 1)) (.cse2 (+ main_~x~0 main_~y~0)) (.cse1 (<= 0 main_~y~0)) (.cse0 (* 3 main_~x~0)) (.cse6 (* 3 main_~y~0)) (.cse5 (+ main_~x~0 2)) (.cse8 (+ main_~x~0 .cse4)) (.cse7 (<= .cse9 (+ main_~x~0 9)))) (or (and (<= 87 .cse0) .cse1 (<= main_~y~0 main_~x~0)) (and (<= 2 .cse2) .cse3 (<= main_~y~0 1)) (and (<= .cse4 main_~x~0) .cse3 (<= 1 .cse2)) (and (<= .cse5 .cse6) (<= 11 .cse2) .cse7 (<= (* 7 main_~y~0) (+ main_~x~0 26))) (and (<= 78 (+ .cse0 (* 9 main_~y~0))) (<= (* 6 main_~y~0) (+ main_~x~0 19)) .cse1) (and (<= (* 5 main_~y~0) (+ main_~x~0 13)) .cse1 (<= 87 (+ .cse0 .cse6))) (and (<= main_~x~0 main_~y~0) (<= 6 .cse8) (<= .cse9 (+ main_~x~0 8))) (and (<= .cse5 .cse4) (<= 10 .cse8) .cse7)))) [2020-09-24 17:22:46,674 INFO L264 CegarLoopResult]: At program point L16-12(lines 16 19) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2020-09-24 17:22:46,674 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-24 17:22:46,674 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-24 17:22:46,674 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-24 17:22:46,674 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-24 17:22:46,674 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-24 17:22:46,675 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-24 17:22:46,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 05:22:46 BoogieIcfgContainer [2020-09-24 17:22:46,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 17:22:46,702 INFO L168 Benchmark]: Toolchain (without parser) took 35835.35 ms. Allocated memory was 141.0 MB in the beginning and 425.7 MB in the end (delta: 284.7 MB). Free memory was 103.0 MB in the beginning and 270.3 MB in the end (delta: -167.2 MB). Peak memory consumption was 117.4 MB. Max. memory is 7.1 GB. [2020-09-24 17:22:46,702 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 17:22:46,703 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.89 ms. Allocated memory is still 141.0 MB. Free memory was 102.4 MB in the beginning and 93.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 17:22:46,704 INFO L168 Benchmark]: Boogie Preprocessor took 107.40 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 93.1 MB in the beginning and 182.9 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-24 17:22:46,704 INFO L168 Benchmark]: RCFGBuilder took 325.88 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.1 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-09-24 17:22:46,705 INFO L168 Benchmark]: TraceAbstraction took 35096.58 ms. Allocated memory was 202.9 MB in the beginning and 425.7 MB in the end (delta: 222.8 MB). Free memory was 168.5 MB in the beginning and 270.3 MB in the end (delta: -101.8 MB). Peak memory consumption was 121.0 MB. Max. memory is 7.1 GB. [2020-09-24 17:22:46,708 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 294.89 ms. Allocated memory is still 141.0 MB. Free memory was 102.4 MB in the beginning and 93.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.40 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 93.1 MB in the beginning and 182.9 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.88 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.1 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 35096.58 ms. Allocated memory was 202.9 MB in the beginning and 425.7 MB in the end (delta: 222.8 MB). Free memory was 168.5 MB in the beginning and 270.3 MB in the end (delta: -101.8 MB). Peak memory consumption was 121.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((((((((87 <= 3 * x && 0 <= y) && y <= x) || ((2 <= x + y && x <= 1) && y <= 1)) || ((2 * y <= x && x <= 1) && 1 <= x + y)) || (((x + 2 <= 3 * y && 11 <= x + y) && 4 * y <= x + 9) && 7 * y <= x + 26)) || ((78 <= 3 * x + 9 * y && 6 * y <= x + 19) && 0 <= y)) || ((5 * y <= x + 13 && 0 <= y) && 87 <= 3 * x + 3 * y)) || ((x <= y && 6 <= x + 2 * y) && 4 * y <= x + 8)) || ((x + 2 <= 2 * y && 10 <= x + 2 * y) && 4 * y <= x + 9) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 34.4s, OverallIterations: 17, TraceHistogramMax: 10, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 521 SDtfs, 1031 SDslu, 3684 SDs, 0 SdLazy, 1654 SolverSat, 251 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 364 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 82 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 24 PreInvPairs, 45 NumberOfFragments, 154 HoareAnnotationTreeSize, 24 FomulaSimplifications, 68 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 602 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 28.1s InterpolantComputationTime, 851 NumberOfCodeBlocks, 851 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 834 ConstructedInterpolants, 0 QuantifiedInterpolants, 292155 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 65/1719 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...