/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --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 [2020-09-25 03:28:01,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:28:01,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:28:01,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:28:01,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:28:01,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:28:01,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:28:01,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:28:01,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:28:01,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:28:01,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:28:01,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:28:01,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:28:01,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:28:01,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:28:01,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:28:01,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:28:01,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:28:01,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:28:01,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:28:01,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:28:01,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:28:01,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:28:01,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:28:01,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:28:01,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:28:01,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:28:01,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:28:01,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:28:01,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:28:01,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:28:01,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:28:01,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:28:01,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:28:01,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:28:01,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:28:01,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:28:01,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:28:01,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:28:01,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:28:01,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:28:01,382 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 [2020-09-25 03:28:01,407 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:28:01,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:28:01,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:28:01,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:28:01,409 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:28:01,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:28:01,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:28:01,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:28:01,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:28:01,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:28:01,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:28:01,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:28:01,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:28:01,411 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:28:01,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:28:01,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:28:01,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:28:01,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:28:01,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:28:01,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:28:01,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:28:01,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:28:01,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:28:01,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:28:01,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:28:01,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:28:01,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:28:01,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:28:01,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:28:01,415 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;enumeration-timeout=5000;interpolation-heuristic=WIDEST;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;enumeration-timeout=5000;interpolation-heuristic=WIDEST;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;enumeration-timeout=5000;interpolation-heuristic=WIDEST;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;enumeration-timeout=5000;interpolation-heuristic=WIDEST;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;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-09-25 03:28:01,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:28:01,889 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:28:01,895 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:28:01,897 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:28:01,899 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:28:01,901 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-25 03:28:01,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/516588ecb/e470c21d32fc4ffb9004c5ffa05a80af/FLAG41ddb400f [2020-09-25 03:28:02,487 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:28:02,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-25 03:28:02,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/516588ecb/e470c21d32fc4ffb9004c5ffa05a80af/FLAG41ddb400f [2020-09-25 03:28:02,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/516588ecb/e470c21d32fc4ffb9004c5ffa05a80af [2020-09-25 03:28:02,856 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:28:02,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:28:02,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:28:02,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:28:02,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:28:02,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:28:02" (1/1) ... [2020-09-25 03:28:02,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b4b692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02, skipping insertion in model container [2020-09-25 03:28:02,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:28:02" (1/1) ... [2020-09-25 03:28:02,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:28:02,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:28:03,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:28:03,121 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:28:03,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:28:03,153 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:28:03,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03 WrapperNode [2020-09-25 03:28:03,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:28:03,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:28:03,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:28:03,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:28:03,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (1/1) ... [2020-09-25 03:28:03,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (1/1) ... [2020-09-25 03:28:03,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (1/1) ... [2020-09-25 03:28:03,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (1/1) ... [2020-09-25 03:28:03,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (1/1) ... [2020-09-25 03:28:03,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (1/1) ... [2020-09-25 03:28:03,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (1/1) ... [2020-09-25 03:28:03,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:28:03,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:28:03,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:28:03,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:28:03,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (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 [2020-09-25 03:28:03,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:28:03,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:28:03,336 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 03:28:03,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:28:03,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:28:03,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:28:03,337 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 03:28:03,337 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 03:28:03,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:28:03,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 03:28:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:28:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:28:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:28:03,550 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:28:03,551 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 03:28:03,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:28:03 BoogieIcfgContainer [2020-09-25 03:28:03,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:28:03,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:28:03,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:28:03,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:28:03,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:28:02" (1/3) ... [2020-09-25 03:28:03,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c678199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:28:03, skipping insertion in model container [2020-09-25 03:28:03,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (2/3) ... [2020-09-25 03:28:03,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c678199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:28:03, skipping insertion in model container [2020-09-25 03:28:03,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:28:03" (3/3) ... [2020-09-25 03:28:03,566 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-25 03:28:03,578 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:28:03,589 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:28:03,645 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:28:03,694 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:28:03,694 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:28:03,694 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:28:03,695 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:28:03,695 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:28:03,695 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:28:03,695 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:28:03,695 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:28:03,715 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 03:28:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 03:28:03,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:03,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:03,724 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:03,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:03,730 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-09-25 03:28:03,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:03,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571672485] [2020-09-25 03:28:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:03,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:03,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:03,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:03,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 03:28:03,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:28:03,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-25 03:28:03,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:03,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 03:28:03,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:03,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 03:28:03,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 03:28:04,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:04,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:04,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:04,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:04,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:04,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:28:04,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:04,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:04,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:04,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:04,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:04,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571672485] [2020-09-25 03:28:04,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:28:04,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 03:28:04,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514079042] [2020-09-25 03:28:04,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 03:28:04,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:04,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 03:28:04,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:28:04,081 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-09-25 03:28:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:04,214 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-09-25 03:28:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 03:28:04,216 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-09-25 03:28:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:04,225 INFO L225 Difference]: With dead ends: 60 [2020-09-25 03:28:04,226 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 03:28:04,230 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 [2020-09-25 03:28:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 03:28:04,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-25 03:28:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 03:28:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-09-25 03:28:04,270 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 11 [2020-09-25 03:28:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:04,270 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-09-25 03:28:04,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 03:28:04,271 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-09-25 03:28:04,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-25 03:28:04,272 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:04,272 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:04,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:28:04,273 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:04,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:04,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1780115143, now seen corresponding path program 1 times [2020-09-25 03:28:04,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:04,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944428709] [2020-09-25 03:28:04,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:04,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:04,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:04,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:04,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:04,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:04,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:04,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 03:28:04,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 03:28:04,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 675 [2020-09-25 03:28:04,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:04,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:28:04,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:04,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 03:28:04,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:05,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:05,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:05,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:05,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:05,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:05,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:28:05,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:05,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:05,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:05,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:05,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 03:28:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:05,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944428709] [2020-09-25 03:28:05,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:05,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 03:28:05,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594575135] [2020-09-25 03:28:05,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 03:28:05,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:05,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 03:28:05,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 03:28:05,101 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-09-25 03:28:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:05,245 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-09-25 03:28:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 03:28:05,246 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-25 03:28:05,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:05,248 INFO L225 Difference]: With dead ends: 46 [2020-09-25 03:28:05,248 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 03:28:05,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-25 03:28:05,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 03:28:05,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-25 03:28:05,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 03:28:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-25 03:28:05,268 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 22 [2020-09-25 03:28:05,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:05,268 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-25 03:28:05,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 03:28:05,269 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-25 03:28:05,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 03:28:05,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:05,274 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:05,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:28:05,275 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:05,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:05,275 INFO L82 PathProgramCache]: Analyzing trace with hash -703709792, now seen corresponding path program 2 times [2020-09-25 03:28:05,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:05,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012342233] [2020-09-25 03:28:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:05,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:05,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:05,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:05,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:05,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:05,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:05,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:06,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:07,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:07,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:07,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:07,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:07,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:07,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 03:28:07,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-25 03:28:07,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2418 [2020-09-25 03:28:07,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:07,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:28:07,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:07,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 03:28:07,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:07,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:07,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:07,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:07,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:07,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:07,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:07,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:07,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:07,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:07,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:07,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:07,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012342233] [2020-09-25 03:28:07,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:07,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 03:28:07,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152134950] [2020-09-25 03:28:07,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 03:28:07,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:07,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 03:28:07,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:28:07,791 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 8 states. [2020-09-25 03:28:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:07,885 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-09-25 03:28:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 03:28:07,885 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-09-25 03:28:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:07,887 INFO L225 Difference]: With dead ends: 55 [2020-09-25 03:28:07,887 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 03:28:07,887 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 [2020-09-25 03:28:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 03:28:07,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-09-25 03:28:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-25 03:28:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-09-25 03:28:07,895 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2020-09-25 03:28:07,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:07,896 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-09-25 03:28:07,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 03:28:07,896 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-09-25 03:28:07,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 03:28:07,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:07,897 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:07,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:28:07,898 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:07,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:07,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1522653351, now seen corresponding path program 3 times [2020-09-25 03:28:07,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:07,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644693298] [2020-09-25 03:28:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:07,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:07,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:07,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:07,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:07,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:07,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:08,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:08,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:08,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:08,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:08,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:10,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:11,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:11,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:12,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:12,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:12,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:12,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 03:28:12,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-09-25 03:28:12,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 03:28:12,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:12,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 03:28:12,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:12,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 03:28:12,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:13,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:13,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:13,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:13,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:13,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 03:28:13,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:13,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:13,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:13,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:13,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:13,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644693298] [2020-09-25 03:28:13,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:13,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 03:28:13,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270614278] [2020-09-25 03:28:13,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 03:28:13,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:13,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 03:28:13,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 03:28:13,054 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 12 states. [2020-09-25 03:28:13,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:13,419 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-09-25 03:28:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 03:28:13,419 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-09-25 03:28:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:13,422 INFO L225 Difference]: With dead ends: 80 [2020-09-25 03:28:13,423 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 03:28:13,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-09-25 03:28:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 03:28:13,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2020-09-25 03:28:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 03:28:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-09-25 03:28:13,433 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 36 [2020-09-25 03:28:13,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:13,433 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-09-25 03:28:13,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 03:28:13,433 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-09-25 03:28:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 03:28:13,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:13,435 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:13,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:28:13,435 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:13,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:13,436 INFO L82 PathProgramCache]: Analyzing trace with hash -64363748, now seen corresponding path program 1 times [2020-09-25 03:28:13,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:13,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851150199] [2020-09-25 03:28:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:13,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:16,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:17,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:17,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:18,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 03:28:18,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-25 03:28:18,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 03:28:18,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:18,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 03:28:18,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:18,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 03:28:18,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:18,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:18,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:18,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:18,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:18,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:18,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:18,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:18,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:18,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851150199] [2020-09-25 03:28:18,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:18,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 03:28:18,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630617903] [2020-09-25 03:28:18,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 03:28:18,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:18,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 03:28:18,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-25 03:28:18,560 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 12 states. [2020-09-25 03:28:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:19,091 INFO L93 Difference]: Finished difference Result 221 states and 249 transitions. [2020-09-25 03:28:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 03:28:19,092 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-09-25 03:28:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:19,094 INFO L225 Difference]: With dead ends: 221 [2020-09-25 03:28:19,094 INFO L226 Difference]: Without dead ends: 202 [2020-09-25 03:28:19,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 03:28:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-25 03:28:19,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 148. [2020-09-25 03:28:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-25 03:28:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2020-09-25 03:28:19,111 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 38 [2020-09-25 03:28:19,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:19,111 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2020-09-25 03:28:19,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 03:28:19,111 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2020-09-25 03:28:19,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 03:28:19,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:19,113 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] [2020-09-25 03:28:19,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:28:19,114 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:19,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:19,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1341886905, now seen corresponding path program 2 times [2020-09-25 03:28:19,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:19,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362500865] [2020-09-25 03:28:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:19,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:22,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 03:28:22,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-25 03:28:22,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3260 [2020-09-25 03:28:22,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 03:28:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 03:28:22,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:22,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:22,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:22,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:22,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:22,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:22,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:22,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:22,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:22,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:22,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:22,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362500865] [2020-09-25 03:28:22,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:22,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 03:28:22,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690171370] [2020-09-25 03:28:22,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 03:28:22,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:22,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 03:28:22,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-25 03:28:22,504 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand 12 states. [2020-09-25 03:28:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:22,819 INFO L93 Difference]: Finished difference Result 206 states and 230 transitions. [2020-09-25 03:28:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-25 03:28:22,820 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-09-25 03:28:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:22,825 INFO L225 Difference]: With dead ends: 206 [2020-09-25 03:28:22,825 INFO L226 Difference]: Without dead ends: 199 [2020-09-25 03:28:22,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-09-25 03:28:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-25 03:28:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 155. [2020-09-25 03:28:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-25 03:28:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 177 transitions. [2020-09-25 03:28:22,857 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 177 transitions. Word has length 40 [2020-09-25 03:28:22,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:22,859 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 177 transitions. [2020-09-25 03:28:22,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 03:28:22,859 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 177 transitions. [2020-09-25 03:28:22,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 03:28:22,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:22,861 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:22,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 03:28:22,864 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:22,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1739992022, now seen corresponding path program 3 times [2020-09-25 03:28:22,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:22,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011460436] [2020-09-25 03:28:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:22,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:23,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:23,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:23,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:24,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 03:28:24,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 03:28:24,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1995 [2020-09-25 03:28:24,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:24,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 03:28:24,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:24,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 03:28:24,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:25,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:25,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:25,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:25,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:25,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:25,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:25,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:25,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:25,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:25,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:25,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:25,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011460436] [2020-09-25 03:28:25,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:25,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 03:28:25,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463144834] [2020-09-25 03:28:25,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 03:28:25,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:25,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 03:28:25,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-25 03:28:25,029 INFO L87 Difference]: Start difference. First operand 155 states and 177 transitions. Second operand 14 states. [2020-09-25 03:28:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:26,070 INFO L93 Difference]: Finished difference Result 290 states and 330 transitions. [2020-09-25 03:28:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-25 03:28:26,071 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-09-25 03:28:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:26,072 INFO L225 Difference]: With dead ends: 290 [2020-09-25 03:28:26,072 INFO L226 Difference]: Without dead ends: 262 [2020-09-25 03:28:26,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2020-09-25 03:28:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-25 03:28:26,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 86. [2020-09-25 03:28:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 03:28:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-09-25 03:28:26,093 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 42 [2020-09-25 03:28:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:26,094 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-09-25 03:28:26,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 03:28:26,094 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-09-25 03:28:26,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 03:28:26,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:26,096 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:26,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 03:28:26,096 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:26,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:26,097 INFO L82 PathProgramCache]: Analyzing trace with hash -736542311, now seen corresponding path program 1 times [2020-09-25 03:28:26,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:26,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550287786] [2020-09-25 03:28:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:26,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:26,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 03:28:26,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:26,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-09-25 03:28:26,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:26,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 03:28:26,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:26,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 03:28:26,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:26,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:26,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:26,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:26,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:26,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:26,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:26,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:26,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:26,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:26,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550287786] [2020-09-25 03:28:26,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:26,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 03:28:26,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857842132] [2020-09-25 03:28:26,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 03:28:26,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:26,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 03:28:26,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:28:26,340 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 11 states. [2020-09-25 03:28:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:26,511 INFO L93 Difference]: Finished difference Result 188 states and 205 transitions. [2020-09-25 03:28:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 03:28:26,513 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-09-25 03:28:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:26,514 INFO L225 Difference]: With dead ends: 188 [2020-09-25 03:28:26,515 INFO L226 Difference]: Without dead ends: 181 [2020-09-25 03:28:26,515 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 [2020-09-25 03:28:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-25 03:28:26,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 93. [2020-09-25 03:28:26,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 03:28:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2020-09-25 03:28:26,523 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 44 [2020-09-25 03:28:26,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:26,523 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2020-09-25 03:28:26,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 03:28:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2020-09-25 03:28:26,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 03:28:26,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:26,525 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:26,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 03:28:26,526 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:26,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:26,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1704279747, now seen corresponding path program 4 times [2020-09-25 03:28:26,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:26,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075400935] [2020-09-25 03:28:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:26,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:27,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:27,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:27,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:27,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:27,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:29,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:29,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:29,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 03:28:29,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-25 03:28:29,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3006 [2020-09-25 03:28:29,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:29,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 03:28:29,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:29,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 03:28:29,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:29,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:29,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:29,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:29,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:29,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:29,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:29,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:29,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:29,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:29,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:29,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:29,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075400935] [2020-09-25 03:28:29,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:29,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 03:28:29,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376105144] [2020-09-25 03:28:29,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 03:28:29,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:29,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 03:28:29,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-09-25 03:28:29,682 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand 14 states. [2020-09-25 03:28:30,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:30,232 INFO L93 Difference]: Finished difference Result 207 states and 229 transitions. [2020-09-25 03:28:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 03:28:30,235 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-09-25 03:28:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:30,236 INFO L225 Difference]: With dead ends: 207 [2020-09-25 03:28:30,236 INFO L226 Difference]: Without dead ends: 185 [2020-09-25 03:28:30,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 03:28:30,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-25 03:28:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 111. [2020-09-25 03:28:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-25 03:28:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-09-25 03:28:30,247 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 49 [2020-09-25 03:28:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:30,247 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-09-25 03:28:30,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 03:28:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-09-25 03:28:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 03:28:30,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:30,249 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:30,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 03:28:30,250 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:30,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:30,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1014393853, now seen corresponding path program 5 times [2020-09-25 03:28:30,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:30,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623135574] [2020-09-25 03:28:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:30,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:32,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:32,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:32,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:32,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:34,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:34,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:35,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:35,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 03:28:35,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-25 03:28:35,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 03:28:35,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:35,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 03:28:35,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:35,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 03:28:35,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:35,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:35,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:35,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:35,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:35,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:35,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:35,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:35,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:35,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:35,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:35,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:35,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623135574] [2020-09-25 03:28:35,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:35,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 03:28:35,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781362554] [2020-09-25 03:28:35,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 03:28:35,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:35,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 03:28:35,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-25 03:28:35,402 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 14 states. [2020-09-25 03:28:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:36,783 INFO L93 Difference]: Finished difference Result 423 states and 474 transitions. [2020-09-25 03:28:36,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-25 03:28:36,783 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-09-25 03:28:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:36,787 INFO L225 Difference]: With dead ends: 423 [2020-09-25 03:28:36,787 INFO L226 Difference]: Without dead ends: 392 [2020-09-25 03:28:36,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=684, Invalid=2856, Unknown=0, NotChecked=0, Total=3540 [2020-09-25 03:28:36,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-09-25 03:28:36,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 240. [2020-09-25 03:28:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-09-25 03:28:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 276 transitions. [2020-09-25 03:28:36,821 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 276 transitions. Word has length 49 [2020-09-25 03:28:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:36,821 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 276 transitions. [2020-09-25 03:28:36,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 03:28:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 276 transitions. [2020-09-25 03:28:36,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 03:28:36,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:36,829 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] [2020-09-25 03:28:36,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 03:28:36,829 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:36,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:36,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 6 times [2020-09-25 03:28:36,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:36,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299951627] [2020-09-25 03:28:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:36,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:37,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 03:28:37,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 03:28:37,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-09-25 03:28:37,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:37,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 03:28:37,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:37,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 03:28:37,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:38,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:38,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:38,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:38,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:38,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:38,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:38,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:38,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:38,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:38,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:38,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:28:38,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299951627] [2020-09-25 03:28:38,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:38,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 03:28:38,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815020880] [2020-09-25 03:28:38,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 03:28:38,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:38,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 03:28:38,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-09-25 03:28:38,023 INFO L87 Difference]: Start difference. First operand 240 states and 276 transitions. Second operand 13 states. [2020-09-25 03:28:38,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:38,315 INFO L93 Difference]: Finished difference Result 545 states and 619 transitions. [2020-09-25 03:28:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 03:28:38,321 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-09-25 03:28:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:38,324 INFO L225 Difference]: With dead ends: 545 [2020-09-25 03:28:38,326 INFO L226 Difference]: Without dead ends: 535 [2020-09-25 03:28:38,327 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 [2020-09-25 03:28:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-09-25 03:28:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 325. [2020-09-25 03:28:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-09-25 03:28:38,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 374 transitions. [2020-09-25 03:28:38,342 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 374 transitions. Word has length 51 [2020-09-25 03:28:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:38,342 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 374 transitions. [2020-09-25 03:28:38,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 03:28:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 374 transitions. [2020-09-25 03:28:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 03:28:38,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:38,344 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] [2020-09-25 03:28:38,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 03:28:38,345 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:38,345 INFO L82 PathProgramCache]: Analyzing trace with hash -947870618, now seen corresponding path program 7 times [2020-09-25 03:28:38,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:38,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349648419] [2020-09-25 03:28:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:38,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:38,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:38,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:38,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:40,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:40,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:40,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 03:28:40,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 03:28:40,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1869 [2020-09-25 03:28:40,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:40,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 03:28:40,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:40,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 03:28:40,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:40,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:40,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:40,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:40,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:40,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:40,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:40,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:40,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:40,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:40,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:40,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:40,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349648419] [2020-09-25 03:28:40,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:40,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 03:28:40,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714664082] [2020-09-25 03:28:40,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 03:28:40,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:40,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 03:28:40,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-09-25 03:28:40,413 INFO L87 Difference]: Start difference. First operand 325 states and 374 transitions. Second operand 16 states. [2020-09-25 03:28:41,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:41,293 INFO L93 Difference]: Finished difference Result 481 states and 541 transitions. [2020-09-25 03:28:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-25 03:28:41,294 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-09-25 03:28:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:41,297 INFO L225 Difference]: With dead ends: 481 [2020-09-25 03:28:41,297 INFO L226 Difference]: Without dead ends: 474 [2020-09-25 03:28:41,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=394, Invalid=1768, Unknown=0, NotChecked=0, Total=2162 [2020-09-25 03:28:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-09-25 03:28:41,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 325. [2020-09-25 03:28:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-09-25 03:28:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 374 transitions. [2020-09-25 03:28:41,312 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 374 transitions. Word has length 51 [2020-09-25 03:28:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:41,312 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 374 transitions. [2020-09-25 03:28:41,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 03:28:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 374 transitions. [2020-09-25 03:28:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 03:28:41,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:41,313 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] [2020-09-25 03:28:41,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 03:28:41,314 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:41,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:41,314 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 2 times [2020-09-25 03:28:41,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:41,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331391610] [2020-09-25 03:28:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:41,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:41,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:41,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 03:28:41,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:41,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-09-25 03:28:41,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:41,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 03:28:41,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:41,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 03:28:41,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:41,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:41,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:41,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:41,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:41,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:41,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:41,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:41,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:41,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:41,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:41,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:41,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331391610] [2020-09-25 03:28:41,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:41,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 03:28:41,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719720710] [2020-09-25 03:28:41,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 03:28:41,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:41,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 03:28:41,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 03:28:41,651 INFO L87 Difference]: Start difference. First operand 325 states and 374 transitions. Second operand 12 states. [2020-09-25 03:28:41,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:41,835 INFO L93 Difference]: Finished difference Result 551 states and 618 transitions. [2020-09-25 03:28:41,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 03:28:41,836 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-09-25 03:28:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:41,839 INFO L225 Difference]: With dead ends: 551 [2020-09-25 03:28:41,839 INFO L226 Difference]: Without dead ends: 544 [2020-09-25 03:28:41,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-25 03:28:41,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-09-25 03:28:41,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 341. [2020-09-25 03:28:41,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-09-25 03:28:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 392 transitions. [2020-09-25 03:28:41,854 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 392 transitions. Word has length 53 [2020-09-25 03:28:41,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:41,854 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 392 transitions. [2020-09-25 03:28:41,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 03:28:41,854 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 392 transitions. [2020-09-25 03:28:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 03:28:41,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:41,856 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:41,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 03:28:41,856 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:41,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1101095059, now seen corresponding path program 8 times [2020-09-25 03:28:41,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:41,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123203289] [2020-09-25 03:28:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:41,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:41,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:41,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:41,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:41,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:41,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:44,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:44,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:44,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:44,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:44,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:46,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 03:28:46,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 03:28:46,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 03:28:46,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:46,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-25 03:28:46,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:46,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-25 03:28:46,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:47,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:47,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:47,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:47,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:47,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:47,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:47,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:47,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 10 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:47,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123203289] [2020-09-25 03:28:47,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:47,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 03:28:47,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657600429] [2020-09-25 03:28:47,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 03:28:47,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:47,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 03:28:47,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-09-25 03:28:47,066 INFO L87 Difference]: Start difference. First operand 341 states and 392 transitions. Second operand 17 states. [2020-09-25 03:28:48,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:48,788 INFO L93 Difference]: Finished difference Result 560 states and 632 transitions. [2020-09-25 03:28:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-25 03:28:48,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-09-25 03:28:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:48,792 INFO L225 Difference]: With dead ends: 560 [2020-09-25 03:28:48,792 INFO L226 Difference]: Without dead ends: 544 [2020-09-25 03:28:48,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=808, Invalid=3748, Unknown=0, NotChecked=0, Total=4556 [2020-09-25 03:28:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-09-25 03:28:48,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 182. [2020-09-25 03:28:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-09-25 03:28:48,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 203 transitions. [2020-09-25 03:28:48,805 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 203 transitions. Word has length 58 [2020-09-25 03:28:48,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:48,805 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 203 transitions. [2020-09-25 03:28:48,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 03:28:48,806 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 203 transitions. [2020-09-25 03:28:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 03:28:48,807 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:48,807 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:48,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 03:28:48,807 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:48,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:48,807 INFO L82 PathProgramCache]: Analyzing trace with hash -157199815, now seen corresponding path program 9 times [2020-09-25 03:28:48,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:48,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190427856] [2020-09-25 03:28:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:48,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:50,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:52,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:52,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:52,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:52,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:53,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:53,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:53,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:53,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 03:28:53,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-09-25 03:28:53,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 03:28:53,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:53,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 03:28:53,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:28:53,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-25 03:28:53,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:53,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:54,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:54,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:54,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:54,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:54,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:54,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:54,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:54,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:54,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:54,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:54,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190427856] [2020-09-25 03:28:54,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:54,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 03:28:54,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396111596] [2020-09-25 03:28:54,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 03:28:54,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:54,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 03:28:54,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-09-25 03:28:54,009 INFO L87 Difference]: Start difference. First operand 182 states and 203 transitions. Second operand 16 states.