/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:13:48,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:13:48,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:13:48,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:13:48,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:13:48,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:13:48,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:13:48,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:13:48,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:13:48,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:13:48,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:13:48,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:13:48,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:13:48,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:13:48,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:13:48,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:13:48,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:13:48,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:13:48,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:13:48,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:13:48,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:13:48,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:13:48,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:13:48,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:13:48,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:13:48,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:13:48,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:13:48,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:13:48,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:13:48,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 00:13:48,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:13:48,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:13:48,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:13:48,466 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 [2020-10-27 00:13:48,525 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:13:48,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:13:48,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:13:48,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:13:48,533 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:13:48,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:13:48,533 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:13:48,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:13:48,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:13:48,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:13:48,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:13:48,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:13:48,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:13:48,536 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:13:48,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:13:48,536 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:13:48,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:13:48,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:13:48,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:13:48,538 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:13:48,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:13:48,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:13:48,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:13:48,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:13:48,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:13:48,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:13:48,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:13:48,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:13:48,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:13:48,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:13:48,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:13:48,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:13:48,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:13:48,984 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:13:48,985 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:13:48,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label33.c [2020-10-27 00:13:49,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b94d460b7/e4d1c631321743fdb44bef214403054e/FLAGd7d114f4d [2020-10-27 00:13:50,198 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:13:50,199 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label33.c [2020-10-27 00:13:50,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b94d460b7/e4d1c631321743fdb44bef214403054e/FLAGd7d114f4d [2020-10-27 00:13:50,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b94d460b7/e4d1c631321743fdb44bef214403054e [2020-10-27 00:13:50,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:13:50,737 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:13:50,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:13:50,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:13:50,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:13:50,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:13:50" (1/1) ... [2020-10-27 00:13:50,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e713d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:13:50, skipping insertion in model container [2020-10-27 00:13:50,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:13:50" (1/1) ... [2020-10-27 00:13:50,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:13:50,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:13:51,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:13:51,983 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:13:52,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:13:52,483 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:13:52,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:13:52 WrapperNode [2020-10-27 00:13:52,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:13:52,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:13:52,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:13:52,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:13:52,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:13:52" (1/1) ... [2020-10-27 00:13:52,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:13:52" (1/1) ... [2020-10-27 00:13:52,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:13:52" (1/1) ... [2020-10-27 00:13:52,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:13:52" (1/1) ... [2020-10-27 00:13:52,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:13:52" (1/1) ... [2020-10-27 00:13:52,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:13:52" (1/1) ... [2020-10-27 00:13:52,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:13:52" (1/1) ... [2020-10-27 00:13:52,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:13:52,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:13:52,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:13:52,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:13:52,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:13:52" (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 [2020-10-27 00:13:52,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:13:52,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:13:52,844 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:13:52,845 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:13:52,845 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:13:52,845 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:13:52,846 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:13:52,846 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:13:52,846 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:13:52,847 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:13:52,848 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:13:52,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:13:52,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:13:52,848 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:13:52,848 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:13:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:13:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:13:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:13:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:13:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:13:52,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:14:02,425 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:14:02,425 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:14:02,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:14:02 BoogieIcfgContainer [2020-10-27 00:14:02,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:14:02,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:14:02,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:14:02,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:14:02,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:13:50" (1/3) ... [2020-10-27 00:14:02,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7305537f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:14:02, skipping insertion in model container [2020-10-27 00:14:02,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:13:52" (2/3) ... [2020-10-27 00:14:02,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7305537f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:14:02, skipping insertion in model container [2020-10-27 00:14:02,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:14:02" (3/3) ... [2020-10-27 00:14:02,439 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label33.c [2020-10-27 00:14:02,453 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:14:02,460 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:14:02,476 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:14:02,516 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:14:02,516 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:14:02,516 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:14:02,516 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:14:02,516 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:14:02,517 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:14:02,517 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:14:02,517 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:14:02,553 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:14:02,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 00:14:02,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:14:02,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:14:02,563 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:14:02,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:14:02,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1367084277, now seen corresponding path program 1 times [2020-10-27 00:14:02,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:14:02,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015047686] [2020-10-27 00:14:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:14:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:02,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:03,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:03,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 00:14:03,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:03,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-27 00:14:03,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:03,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:14:03,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:14:03,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 00:14:03,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:14:03,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:14:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:03,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:03,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:03,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:14:03,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:03,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 00:14:03,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:03,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:14:03,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:14:03,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:14:03,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:14:03,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015047686] [2020-10-27 00:14:03,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:14:03,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:14:03,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847511977] [2020-10-27 00:14:03,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:14:03,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:14:03,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:14:03,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:14:03,706 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:14:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:14:18,607 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 00:14:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:14:18,609 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 00:14:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:14:18,648 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 00:14:18,649 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 00:14:18,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:14:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 00:14:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 00:14:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 00:14:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 00:14:18,793 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 23 [2020-10-27 00:14:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:14:18,794 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 00:14:18,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:14:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 00:14:18,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 00:14:18,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:14:18,799 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:14:18,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:14:18,800 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:14:18,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:14:18,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1989946058, now seen corresponding path program 1 times [2020-10-27 00:14:18,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:14:18,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690162321] [2020-10-27 00:14:18,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:14:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:18,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:19,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:20,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:20,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:20,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 00:14:20,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:14:20,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1337 [2020-10-27 00:14:20,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:20,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:14:20,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:14:20,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:14:20,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:14:20,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:14:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:20,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:20,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:20,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:14:20,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:20,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 00:14:20,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:14:20,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:14:20,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:14:20,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:20,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:14:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:20,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:20,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:20,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:14:20,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:20,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-27 00:14:20,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:20,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:14:20,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:14:20,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:14:20,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:14:20,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690162321] [2020-10-27 00:14:20,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:14:20,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:14:20,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58369539] [2020-10-27 00:14:20,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:14:20,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:14:20,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:14:20,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:14:20,689 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 7 states. [2020-10-27 00:14:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:14:37,602 INFO L93 Difference]: Finished difference Result 2964 states and 4573 transitions. [2020-10-27 00:14:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:14:37,603 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-27 00:14:37,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:14:37,616 INFO L225 Difference]: With dead ends: 2964 [2020-10-27 00:14:37,616 INFO L226 Difference]: Without dead ends: 1967 [2020-10-27 00:14:37,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:14:37,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2020-10-27 00:14:37,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1915. [2020-10-27 00:14:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1915 states. [2020-10-27 00:14:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2483 transitions. [2020-10-27 00:14:37,701 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2483 transitions. Word has length 94 [2020-10-27 00:14:37,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:14:37,701 INFO L481 AbstractCegarLoop]: Abstraction has 1915 states and 2483 transitions. [2020-10-27 00:14:37,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:14:37,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2483 transitions. [2020-10-27 00:14:37,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 00:14:37,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:14:37,706 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:14:37,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:14:37,706 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:14:37,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:14:37,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1533553473, now seen corresponding path program 1 times [2020-10-27 00:14:37,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:14:37,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133750150] [2020-10-27 00:14:37,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:14:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:37,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:38,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:38,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 00:14:38,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:38,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-27 00:14:38,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:38,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:14:38,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:14:38,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 00:14:38,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:38,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:14:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:38,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:38,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:38,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:14:38,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:38,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 00:14:38,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:38,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:14:38,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:14:38,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:14:38,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:38,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:14:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:38,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:38,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:38,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:14:38,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:38,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-27 00:14:38,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:38,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:14:38,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:14:38,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:14:38,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:14:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:14:38,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133750150] [2020-10-27 00:14:38,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:14:38,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:14:38,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257797506] [2020-10-27 00:14:38,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:14:38,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:14:38,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:14:38,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:14:38,949 INFO L87 Difference]: Start difference. First operand 1915 states and 2483 transitions. Second operand 8 states. [2020-10-27 00:14:39,688 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-10-27 00:14:43,304 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 00:15:00,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:15:00,343 INFO L93 Difference]: Finished difference Result 6197 states and 7993 transitions. [2020-10-27 00:15:00,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 00:15:00,355 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 97 [2020-10-27 00:15:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:15:00,377 INFO L225 Difference]: With dead ends: 6197 [2020-10-27 00:15:00,378 INFO L226 Difference]: Without dead ends: 3382 [2020-10-27 00:15:00,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-10-27 00:15:00,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2020-10-27 00:15:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 3310. [2020-10-27 00:15:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3310 states. [2020-10-27 00:15:00,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 4053 transitions. [2020-10-27 00:15:00,525 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 4053 transitions. Word has length 97 [2020-10-27 00:15:00,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:15:00,526 INFO L481 AbstractCegarLoop]: Abstraction has 3310 states and 4053 transitions. [2020-10-27 00:15:00,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:15:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 4053 transitions. [2020-10-27 00:15:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-27 00:15:00,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:00,539 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:15:00,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:15:00,539 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:00,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1095742186, now seen corresponding path program 1 times [2020-10-27 00:15:00,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:00,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195993183] [2020-10-27 00:15:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:00,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:01,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:01,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:01,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-27 00:15:01,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:15:01,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1147 [2020-10-27 00:15:01,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:01,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:15:01,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:15:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 00:15:01,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-27 00:15:01,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:15:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:01,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:01,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:01,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:15:01,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:01,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:15:01,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:01,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:15:01,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:01,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:15:01,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:15:01,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:15:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:02,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:02,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:02,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:15:02,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:02,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 00:15:02,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:02,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:15:02,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:02,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:15:02,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:02,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:15:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:02,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:02,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:02,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 00:15:02,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:02,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-27 00:15:02,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:02,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:15:02,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:15:02,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 00:15:02,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 00:15:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:15:02,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195993183] [2020-10-27 00:15:02,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:15:02,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:15:02,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713364603] [2020-10-27 00:15:02,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:15:02,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:15:02,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:15:02,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:15:02,531 INFO L87 Difference]: Start difference. First operand 3310 states and 4053 transitions. Second operand 7 states. [2020-10-27 00:15:20,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:15:20,011 INFO L93 Difference]: Finished difference Result 8048 states and 10361 transitions. [2020-10-27 00:15:20,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:15:20,013 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 180 [2020-10-27 00:15:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:15:20,040 INFO L225 Difference]: With dead ends: 8048 [2020-10-27 00:15:20,041 INFO L226 Difference]: Without dead ends: 5176 [2020-10-27 00:15:20,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:15:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2020-10-27 00:15:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 5166. [2020-10-27 00:15:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5166 states. [2020-10-27 00:15:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5166 states to 5166 states and 6337 transitions. [2020-10-27 00:15:20,201 INFO L78 Accepts]: Start accepts. Automaton has 5166 states and 6337 transitions. Word has length 180 [2020-10-27 00:15:20,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:15:20,202 INFO L481 AbstractCegarLoop]: Abstraction has 5166 states and 6337 transitions. [2020-10-27 00:15:20,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:15:20,202 INFO L276 IsEmpty]: Start isEmpty. Operand 5166 states and 6337 transitions. [2020-10-27 00:15:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-27 00:15:20,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:20,205 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:15:20,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:15:20,206 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:20,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:20,206 INFO L82 PathProgramCache]: Analyzing trace with hash 534924627, now seen corresponding path program 1 times [2020-10-27 00:15:20,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:20,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926339477] [2020-10-27 00:15:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:20,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:20,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:22,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:23,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:24,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:24,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-27 00:15:24,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:15:24,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4468 [2020-10-27 00:15:24,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:24,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:15:24,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:15:24,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 00:15:24,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:24,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:15:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:24,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:24,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:24,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:15:24,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:24,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 00:15:24,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:24,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:15:24,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:24,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:15:24,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:24,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:15:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:25,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:25,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:25,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:15:25,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:25,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-27 00:15:25,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:25,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:15:25,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:15:25,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:15:25,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:25,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:15:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:25,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:25,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:25,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:15:25,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:25,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 00:15:25,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:25,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:15:25,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:15:25,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:15:25,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-27 00:15:25,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926339477] [2020-10-27 00:15:25,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:15:25,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:15:25,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959270894] [2020-10-27 00:15:25,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:15:25,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:15:25,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:15:25,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:15:25,722 INFO L87 Difference]: Start difference. First operand 5166 states and 6337 transitions. Second operand 9 states. [2020-10-27 00:15:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:15:56,861 INFO L93 Difference]: Finished difference Result 16537 states and 21617 transitions. [2020-10-27 00:15:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 00:15:56,863 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 185 [2020-10-27 00:15:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:15:56,931 INFO L225 Difference]: With dead ends: 16537 [2020-10-27 00:15:56,931 INFO L226 Difference]: Without dead ends: 11325 [2020-10-27 00:15:56,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-10-27 00:15:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11325 states. [2020-10-27 00:15:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11325 to 11206. [2020-10-27 00:15:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11206 states. [2020-10-27 00:15:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11206 states to 11206 states and 13789 transitions. [2020-10-27 00:15:57,277 INFO L78 Accepts]: Start accepts. Automaton has 11206 states and 13789 transitions. Word has length 185 [2020-10-27 00:15:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:15:57,279 INFO L481 AbstractCegarLoop]: Abstraction has 11206 states and 13789 transitions. [2020-10-27 00:15:57,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:15:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 11206 states and 13789 transitions. [2020-10-27 00:15:57,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-27 00:15:57,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:57,284 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:15:57,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:15:57,284 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:57,285 INFO L82 PathProgramCache]: Analyzing trace with hash 145265181, now seen corresponding path program 1 times [2020-10-27 00:15:57,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:57,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991641989] [2020-10-27 00:15:57,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:57,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:57,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:57,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:02,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:02,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-27 00:16:02,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:16:02,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 00:16:02,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:02,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:16:02,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:16:02,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 00:16:02,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:02,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:16:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:02,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:02,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:02,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:16:02,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:02,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:16:02,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:02,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:16:02,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:02,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:16:02,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:02,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:16:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:02,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:02,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:02,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:16:02,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:02,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-27 00:16:02,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:02,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:16:02,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:02,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:16:02,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:02,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:16:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:02,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:02,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:02,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:02,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:16:02,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:16:02,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-27 00:16:02,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:02,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:02,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:02,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:16:02,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 96 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:16:03,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991641989] [2020-10-27 00:16:03,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:16:03,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:16:03,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575819580] [2020-10-27 00:16:03,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:16:03,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:16:03,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:16:03,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:16:03,100 INFO L87 Difference]: Start difference. First operand 11206 states and 13789 transitions. Second operand 6 states. [2020-10-27 00:16:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:16,240 INFO L93 Difference]: Finished difference Result 22423 states and 28062 transitions. [2020-10-27 00:16:16,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:16:16,243 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 196 [2020-10-27 00:16:16,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:16,291 INFO L225 Difference]: With dead ends: 22423 [2020-10-27 00:16:16,292 INFO L226 Difference]: Without dead ends: 11658 [2020-10-27 00:16:16,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:16:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11658 states. [2020-10-27 00:16:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11658 to 11645. [2020-10-27 00:16:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11645 states. [2020-10-27 00:16:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11645 states to 11645 states and 14663 transitions. [2020-10-27 00:16:16,586 INFO L78 Accepts]: Start accepts. Automaton has 11645 states and 14663 transitions. Word has length 196 [2020-10-27 00:16:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:16,587 INFO L481 AbstractCegarLoop]: Abstraction has 11645 states and 14663 transitions. [2020-10-27 00:16:16,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:16:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand 11645 states and 14663 transitions. [2020-10-27 00:16:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-27 00:16:16,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:16,593 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:16:16,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:16:16,594 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:16,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2090634048, now seen corresponding path program 1 times [2020-10-27 00:16:16,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:16,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923823142] [2020-10-27 00:16:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:16,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:16,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:18,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:18,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:18,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:21,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:21,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:21,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-27 00:16:21,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 00:16:21,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 00:16:21,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:21,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:16:21,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:16:21,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-27 00:16:21,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:21,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:16:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:21,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:21,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:21,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:16:21,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:21,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:16:21,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:21,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:16:21,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:21,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:16:21,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:21,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:16:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:21,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:22,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:22,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:16:22,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:22,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 00:16:22,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:22,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:16:22,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:22,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:16:22,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:22,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:16:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:22,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:22,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:22,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:16:22,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:22,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 00:16:22,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:16:22,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:22,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:16:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:22,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:22,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:22,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:16:22,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:22,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-27 00:16:22,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:22,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:22,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:22,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:16:22,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 126 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:16:22,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923823142] [2020-10-27 00:16:22,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:16:22,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:16:22,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966904796] [2020-10-27 00:16:22,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 00:16:22,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:16:22,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 00:16:22,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:16:22,930 INFO L87 Difference]: Start difference. First operand 11645 states and 14663 transitions. Second operand 11 states. [2020-10-27 00:16:23,176 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 00:16:28,749 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 00:16:47,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:47,473 INFO L93 Difference]: Finished difference Result 29332 states and 38704 transitions. [2020-10-27 00:16:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 00:16:47,479 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 271 [2020-10-27 00:16:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:47,548 INFO L225 Difference]: With dead ends: 29332 [2020-10-27 00:16:47,549 INFO L226 Difference]: Without dead ends: 17683 [2020-10-27 00:16:47,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-10-27 00:16:47,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17683 states. [2020-10-27 00:16:48,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17683 to 14411. [2020-10-27 00:16:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14411 states. [2020-10-27 00:16:48,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14411 states to 14411 states and 17929 transitions. [2020-10-27 00:16:48,046 INFO L78 Accepts]: Start accepts. Automaton has 14411 states and 17929 transitions. Word has length 271 [2020-10-27 00:16:48,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:48,047 INFO L481 AbstractCegarLoop]: Abstraction has 14411 states and 17929 transitions. [2020-10-27 00:16:48,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 00:16:48,048 INFO L276 IsEmpty]: Start isEmpty. Operand 14411 states and 17929 transitions. [2020-10-27 00:16:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-27 00:16:48,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:48,054 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:16:48,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:16:48,055 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:48,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:48,055 INFO L82 PathProgramCache]: Analyzing trace with hash 300407140, now seen corresponding path program 1 times [2020-10-27 00:16:48,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:48,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124591978] [2020-10-27 00:16:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:48,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:48,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:49,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:51,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:51,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-27 00:16:51,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:16:51,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3230 [2020-10-27 00:16:51,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:51,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:16:51,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:16:51,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-27 00:16:51,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:51,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:16:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:51,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:51,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:51,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:16:51,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:51,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:16:51,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:16:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:51,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:16:51,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:51,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:16:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:51,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:51,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:51,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:16:51,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:51,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-27 00:16:51,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:51,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:16:51,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:51,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:16:51,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:51,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:16:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:51,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:51,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:51,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:51,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:16:51,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:16:51,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-27 00:16:51,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:16:51,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:52,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:16:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:52,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:52,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:52,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 00:16:52,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:52,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-27 00:16:52,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:52,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:52,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:52,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 00:16:52,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 272 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:16:52,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124591978] [2020-10-27 00:16:52,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:16:52,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:16:52,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825783350] [2020-10-27 00:16:52,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:16:52,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:16:52,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:16:52,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:16:52,326 INFO L87 Difference]: Start difference. First operand 14411 states and 17929 transitions. Second operand 9 states. [2020-10-27 00:17:00,326 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:17:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:17:12,194 INFO L93 Difference]: Finished difference Result 29273 states and 36909 transitions. [2020-10-27 00:17:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:17:12,196 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 273 [2020-10-27 00:17:12,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:17:12,250 INFO L225 Difference]: With dead ends: 29273 [2020-10-27 00:17:12,250 INFO L226 Difference]: Without dead ends: 15303 [2020-10-27 00:17:12,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-27 00:17:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15303 states. [2020-10-27 00:17:12,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15303 to 15290. [2020-10-27 00:17:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15290 states. [2020-10-27 00:17:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15290 states to 15290 states and 19114 transitions. [2020-10-27 00:17:12,656 INFO L78 Accepts]: Start accepts. Automaton has 15290 states and 19114 transitions. Word has length 273 [2020-10-27 00:17:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:17:12,657 INFO L481 AbstractCegarLoop]: Abstraction has 15290 states and 19114 transitions. [2020-10-27 00:17:12,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:17:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 15290 states and 19114 transitions. [2020-10-27 00:17:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-10-27 00:17:12,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:12,664 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:17:12,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:17:12,665 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:12,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:12,666 INFO L82 PathProgramCache]: Analyzing trace with hash -982232637, now seen corresponding path program 1 times [2020-10-27 00:17:12,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:12,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322873485] [2020-10-27 00:17:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:12,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:13,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:13,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:15,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:17,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:17,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-27 00:17:17,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:17:17,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 00:17:17,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:17,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:17,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:17:17,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:17:17,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:17,964 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:17:17,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:17,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:17,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:17,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:17,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:17,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 00:17:17,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:17,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:17:17,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:17,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:17:17,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:17:18,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:17:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:18,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:18,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:18,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:17:18,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:18,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-27 00:17:18,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:18,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:18,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:18,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:17:18,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:17:18,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:17:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:18,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:18,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:18,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 00:17:18,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:18,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-27 00:17:18,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:18,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:18,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:18,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 00:17:18,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:18,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-10-27 00:17:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:18,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:18,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:18,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:17:18,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:18,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 00:17:18,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:18,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:17:18,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:17:18,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:17:18,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 133 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:17:18,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322873485] [2020-10-27 00:17:18,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:17:18,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:17:18,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121760567] [2020-10-27 00:17:18,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:17:18,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:18,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:17:18,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:17:18,902 INFO L87 Difference]: Start difference. First operand 15290 states and 19114 transitions. Second operand 7 states. [2020-10-27 00:17:20,024 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:17:26,382 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 68