/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/loops/sum03-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:20:30,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:20:30,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:20:30,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:20:30,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:20:30,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:20:30,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:20:30,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:20:30,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:20:30,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:20:30,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:20:30,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:20:30,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:20:30,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:20:30,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:20:30,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:20:30,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:20:30,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:20:30,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:20:30,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:20:30,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:20:30,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:20:30,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:20:30,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:20:30,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 17:20:30,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:20:30,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:20:30,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:20:30,406 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 17:20:30,433 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:20:30,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:20:30,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:20:30,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:20:30,436 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:20:30,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:20:30,436 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:20:30,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:20:30,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:20:30,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:20:30,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:20:30,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:20:30,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:20:30,438 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:20:30,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:20:30,438 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:20:30,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:20:30,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:20:30,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:20:30,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:20:30,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:20:30,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:20:30,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:20:30,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:20:30,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:20:30,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:20:30,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:20:30,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:20:30,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:20:30,441 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 17:20:30,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:20:30,921 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:20:30,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:20:30,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:20:30,928 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:20:30,929 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum03-2.i [2020-09-24 17:20:31,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd2421702/51e48ea35df1496ea22713c696f927a7/FLAG165bba132 [2020-09-24 17:20:31,561 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:20:31,562 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum03-2.i [2020-09-24 17:20:31,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd2421702/51e48ea35df1496ea22713c696f927a7/FLAG165bba132 [2020-09-24 17:20:31,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd2421702/51e48ea35df1496ea22713c696f927a7 [2020-09-24 17:20:31,935 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:20:31,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:20:31,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:20:31,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:20:31,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:20:31,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:20:31" (1/1) ... [2020-09-24 17:20:31,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3155a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:31, skipping insertion in model container [2020-09-24 17:20:31,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:20:31" (1/1) ... [2020-09-24 17:20:31,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:20:31,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:20:32,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:20:32,256 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:20:32,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:20:32,301 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:20:32,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32 WrapperNode [2020-09-24 17:20:32,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:20:32,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:20:32,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:20:32,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:20:32,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (1/1) ... [2020-09-24 17:20:32,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (1/1) ... [2020-09-24 17:20:32,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (1/1) ... [2020-09-24 17:20:32,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (1/1) ... [2020-09-24 17:20:32,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (1/1) ... [2020-09-24 17:20:32,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (1/1) ... [2020-09-24 17:20:32,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (1/1) ... [2020-09-24 17:20:32,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:20:32,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:20:32,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:20:32,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:20:32,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (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 17:20:32,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:20:32,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:20:32,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 17:20:32,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:20:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:20:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 17:20:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 17:20:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:20:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:20:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:20:32,799 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:20:32,799 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 17:20:32,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:20:32 BoogieIcfgContainer [2020-09-24 17:20:32,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:20:32,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:20:32,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:20:32,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:20:32,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:20:31" (1/3) ... [2020-09-24 17:20:32,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e1b8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:20:32, skipping insertion in model container [2020-09-24 17:20:32,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:32" (2/3) ... [2020-09-24 17:20:32,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e1b8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:20:32, skipping insertion in model container [2020-09-24 17:20:32,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:20:32" (3/3) ... [2020-09-24 17:20:32,851 INFO L109 eAbstractionObserver]: Analyzing ICFG sum03-2.i [2020-09-24 17:20:32,883 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:20:32,896 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:20:32,934 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:20:32,967 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:20:32,967 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:20:32,967 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:20:32,968 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:20:32,968 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:20:32,968 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:20:32,968 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:20:32,968 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:20:32,992 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-24 17:20:33,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-24 17:20:33,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:33,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:33,003 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:33,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:33,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1015763017, now seen corresponding path program 1 times [2020-09-24 17:20:33,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:33,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513778848] [2020-09-24 17:20:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:33,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,362 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 17:20:33,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:33,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-09-24 17:20:33,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:20:33,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:20:33,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 17:20:33,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 17:20:33,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:33,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,766 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:33,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:33,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:20:33,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:33,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:33,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:33,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:33,782 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 17:20:33,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513778848] [2020-09-24 17:20:33,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:20:33,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 17:20:33,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966745507] [2020-09-24 17:20:33,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 17:20:33,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:33,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 17:20:33,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:20:33,817 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 9 states. [2020-09-24 17:20:34,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:34,031 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-09-24 17:20:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 17:20:34,033 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-09-24 17:20:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:34,045 INFO L225 Difference]: With dead ends: 50 [2020-09-24 17:20:34,046 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 17:20:34,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:20:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 17:20:34,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-24 17:20:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 17:20:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-24 17:20:34,108 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 19 [2020-09-24 17:20:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:34,108 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-24 17:20:34,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 17:20:34,109 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-24 17:20:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 17:20:34,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:34,110 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:34,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:20:34,111 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:34,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:34,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1391461948, now seen corresponding path program 1 times [2020-09-24 17:20:34,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:34,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336378050] [2020-09-24 17:20:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:34,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:34,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,312 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:35,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 17:20:35,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:20:35,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1176 [2020-09-24 17:20:35,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:35,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 17:20:35,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:20:35,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 17:20:35,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:35,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:35,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,675 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:35,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:35,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:35,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:35,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:35,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:35,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:35,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:35,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:35,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-24 17:20:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:35,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,718 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:35,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:20:35,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:35,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 17:20:35,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:35,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:20:35,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:35,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:20:35,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:35,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336378050] [2020-09-24 17:20:35,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:35,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 17:20:35,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837154740] [2020-09-24 17:20:35,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 17:20:35,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 17:20:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:20:35,735 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 12 states. [2020-09-24 17:20:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:36,016 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-24 17:20:36,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 17:20:36,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-09-24 17:20:36,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:36,019 INFO L225 Difference]: With dead ends: 46 [2020-09-24 17:20:36,019 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 17:20:36,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-24 17:20:36,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 17:20:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 17:20:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 17:20:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-24 17:20:36,030 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 29 [2020-09-24 17:20:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:36,031 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-24 17:20:36,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 17:20:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-24 17:20:36,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 17:20:36,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:36,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:36,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:20:36,033 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:36,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:36,034 INFO L82 PathProgramCache]: Analyzing trace with hash -864598657, now seen corresponding path program 2 times [2020-09-24 17:20:36,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:36,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371902155] [2020-09-24 17:20:36,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:36,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:36,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:36,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:37,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:41,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:45,577 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:45,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 17:20:45,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:20:45,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9522 [2020-09-24 17:20:45,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:45,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 17:20:45,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:20:45,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 17:20:45,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:46,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:46,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:46,122 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:46,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:46,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:46,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:20:46,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:46,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:46,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:46,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:46,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:46,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-24 17:20:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:46,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:46,146 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:46,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:20:46,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:46,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 17:20:46,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:46,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:20:46,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:46,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:20:46,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:46,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 17:20:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:46,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:46,188 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:46,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:20:46,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:46,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 17:20:46,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:46,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:20:46,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:46,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:20:46,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 17:20:46,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371902155] [2020-09-24 17:20:46,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:46,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 17:20:46,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636805807] [2020-09-24 17:20:46,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 17:20:46,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:46,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 17:20:46,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-09-24 17:20:46,291 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 13 states. [2020-09-24 17:20:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:48,845 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-09-24 17:20:48,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 17:20:48,846 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-09-24 17:20:48,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:48,848 INFO L225 Difference]: With dead ends: 56 [2020-09-24 17:20:48,848 INFO L226 Difference]: Without dead ends: 54 [2020-09-24 17:20:48,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-09-24 17:20:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-24 17:20:48,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-09-24 17:20:48,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 17:20:48,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-24 17:20:48,873 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 39 [2020-09-24 17:20:48,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:48,873 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-24 17:20:48,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 17:20:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-24 17:20:48,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 17:20:48,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:48,879 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:48,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:20:48,880 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:48,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:48,880 INFO L82 PathProgramCache]: Analyzing trace with hash -628399238, now seen corresponding path program 3 times [2020-09-24 17:20:48,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:48,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476933810] [2020-09-24 17:20:48,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:48,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:49,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:49,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:50,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:50,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:55,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:03,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:04,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:04,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:05,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:12,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking...