/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=DEEPEST --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/array-crafted/zero_sum_const1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:07:34,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:07:34,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:07:34,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:07:34,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:07:34,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:07:34,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:07:34,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:07:34,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:07:34,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:07:34,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:07:34,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:07:34,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:07:34,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:07:34,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:07:34,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:07:34,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:07:34,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:07:34,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:07:34,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:07:34,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:07:34,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:07:34,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:07:34,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:07:34,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:07:34,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:07:34,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:07:34,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:07:34,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:07:34,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:07:34,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:07:34,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:07:34,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:07:34,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:07:34,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:07:34,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:07:34,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:07:34,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:07:34,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:07:34,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:07:34,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:07:34,911 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 14:07:34,965 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:07:34,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:07:34,971 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:07:34,972 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:07:34,972 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:07:34,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:07:34,973 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:07:34,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:07:34,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:07:34,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:07:34,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:07:34,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:07:34,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:07:34,976 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:07:34,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:07:34,976 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:07:34,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:07:34,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:07:34,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:07:34,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:07:34,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:07:34,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:07:34,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:07:34,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:07:34,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:07:34,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:07:34,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:07:34,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:07:34,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:07:34,980 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:07:35,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:07:35,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:07:35,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:07:35,494 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:07:35,495 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:07:35,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2020-10-27 14:07:35,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba39d8715/50c51e7be4034d8084aaf0c8466b7918/FLAGffec746e9 [2020-10-27 14:07:36,169 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:07:36,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2020-10-27 14:07:36,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba39d8715/50c51e7be4034d8084aaf0c8466b7918/FLAGffec746e9 [2020-10-27 14:07:36,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba39d8715/50c51e7be4034d8084aaf0c8466b7918 [2020-10-27 14:07:36,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:07:36,587 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:07:36,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:36,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:07:36,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:07:36,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f416bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36, skipping insertion in model container [2020-10-27 14:07:36,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:07:36,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:07:36,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:36,921 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:07:36,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:36,985 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:07:36,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36 WrapperNode [2020-10-27 14:07:36,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:36,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:07:36,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:07:36,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:07:37,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:37,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:37,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:37,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:37,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:37,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:37,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:37,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:07:37,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:07:37,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:07:37,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:07:37,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (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 14:07:37,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:07:37,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:07:37,156 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:07:37,157 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:07:37,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:07:37,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:07:37,158 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:07:37,158 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:07:37,158 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:07:37,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:07:37,159 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:07:37,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:07:37,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-27 14:07:37,160 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:07:37,160 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:07:37,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:07:37,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:07:37,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:07:37,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:07:37,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:07:37,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:07:37,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:07:37,640 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:07:37,640 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:07:37,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:37 BoogieIcfgContainer [2020-10-27 14:07:37,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:07:37,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:07:37,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:07:37,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:07:37,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:07:36" (1/3) ... [2020-10-27 14:07:37,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d660dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:37, skipping insertion in model container [2020-10-27 14:07:37,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (2/3) ... [2020-10-27 14:07:37,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d660dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:37, skipping insertion in model container [2020-10-27 14:07:37,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:37" (3/3) ... [2020-10-27 14:07:37,686 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const1.c [2020-10-27 14:07:37,698 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:07:37,703 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:07:37,717 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:07:37,746 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:07:37,746 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:07:37,747 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:07:37,747 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:07:37,747 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:07:37,747 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:07:37,747 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:07:37,747 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:07:37,775 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-27 14:07:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:07:37,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:37,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:37,783 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:37,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:37,804 INFO L82 PathProgramCache]: Analyzing trace with hash 729603185, now seen corresponding path program 1 times [2020-10-27 14:07:37,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:37,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932181983] [2020-10-27 14:07:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:38,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:38,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:07:38,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:07:38,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-10-27 14:07:38,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:38,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:07:38,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:38,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:07:38,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:07:38,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:38,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:38,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:38,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:38,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 14:07:38,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:38,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:38,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:38,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:38,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:38,886 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 14:07:38,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932181983] [2020-10-27 14:07:38,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:38,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:07:38,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098241409] [2020-10-27 14:07:38,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:07:38,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:38,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:07:38,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:07:38,914 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-10-27 14:07:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:39,204 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2020-10-27 14:07:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:07:39,206 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 14:07:39,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:39,214 INFO L225 Difference]: With dead ends: 61 [2020-10-27 14:07:39,215 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 14:07:39,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:07:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 14:07:39,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-10-27 14:07:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 14:07:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-27 14:07:39,264 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-27 14:07:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:39,264 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-27 14:07:39,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:07:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-27 14:07:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:07:39,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:39,266 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 14:07:39,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:07:39,266 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:39,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:39,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1113674377, now seen corresponding path program 1 times [2020-10-27 14:07:39,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:39,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762078788] [2020-10-27 14:07:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:39,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:39,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:39,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:39,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:39,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:41,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:07:41,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:07:41,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2228 [2020-10-27 14:07:41,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:41,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:07:41,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:41,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:07:41,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:41,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:41,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:41,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:41,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:41,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:07:41,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:41,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:41,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:41,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:41,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:07:41,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762078788] [2020-10-27 14:07:41,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:41,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:07:41,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890755011] [2020-10-27 14:07:41,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:07:41,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:41,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:07:41,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:07:41,625 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-27 14:07:41,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:41,811 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-27 14:07:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:07:41,812 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 14:07:41,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:41,813 INFO L225 Difference]: With dead ends: 44 [2020-10-27 14:07:41,813 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 14:07:41,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:07:41,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 14:07:41,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 14:07:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 14:07:41,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-27 14:07:41,823 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-10-27 14:07:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:41,823 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-27 14:07:41,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:07:41,824 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-27 14:07:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:07:41,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:41,825 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:41,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:07:41,826 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:41,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:41,826 INFO L82 PathProgramCache]: Analyzing trace with hash 588341757, now seen corresponding path program 2 times [2020-10-27 14:07:41,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:41,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108347197] [2020-10-27 14:07:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:41,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:42,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:42,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:44,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:44,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:45,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:45,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:07:45,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:07:45,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3711 [2020-10-27 14:07:45,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:45,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:07:45,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:45,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:07:45,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:46,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:46,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:46,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:46,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:46,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:46,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:07:46,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:46,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:46,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:46,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:46,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:07:46,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108347197] [2020-10-27 14:07:46,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:46,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:07:46,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564925929] [2020-10-27 14:07:46,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:07:46,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:46,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:07:46,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:07:46,148 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2020-10-27 14:07:47,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:47,187 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-27 14:07:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:07:47,188 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-27 14:07:47,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:47,189 INFO L225 Difference]: With dead ends: 44 [2020-10-27 14:07:47,189 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 14:07:47,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:07:47,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 14:07:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-27 14:07:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 14:07:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-27 14:07:47,200 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2020-10-27 14:07:47,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:47,200 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-27 14:07:47,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:07:47,200 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-27 14:07:47,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:07:47,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:47,202 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:47,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:07:47,202 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:47,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:47,203 INFO L82 PathProgramCache]: Analyzing trace with hash -190895425, now seen corresponding path program 3 times [2020-10-27 14:07:47,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:47,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502176873] [2020-10-27 14:07:47,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:47,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:47,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:48,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:48,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:07:48,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:07:48,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1089 [2020-10-27 14:07:48,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:48,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:07:48,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 14:07:48,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:07:48,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:48,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:48,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:48,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:48,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:48,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:48,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:07:48,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:48,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:48,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:07:48,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502176873] [2020-10-27 14:07:48,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:48,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:07:48,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899436557] [2020-10-27 14:07:48,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:07:48,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:48,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:07:48,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:07:48,437 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 10 states. [2020-10-27 14:07:48,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:48,722 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-10-27 14:07:48,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:07:48,723 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-27 14:07:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:48,724 INFO L225 Difference]: With dead ends: 71 [2020-10-27 14:07:48,724 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 14:07:48,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:07:48,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 14:07:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2020-10-27 14:07:48,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 14:07:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-27 14:07:48,734 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2020-10-27 14:07:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:48,734 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-27 14:07:48,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:07:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-27 14:07:48,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:07:48,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:48,736 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:48,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:07:48,736 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:48,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1675521471, now seen corresponding path program 4 times [2020-10-27 14:07:48,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:48,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083305379] [2020-10-27 14:07:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:48,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:48,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:50,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:50,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:07:50,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:07:50,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1451 [2020-10-27 14:07:50,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:07:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:07:50,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:07:50,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 14:07:50,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:50,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:50,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:50,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:50,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:50,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:07:50,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:50,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:50,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:50,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:50,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:07:50,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083305379] [2020-10-27 14:07:50,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:50,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:07:50,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398186748] [2020-10-27 14:07:50,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:07:50,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:50,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:07:50,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:07:50,376 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 10 states. [2020-10-27 14:07:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:50,761 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-27 14:07:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:07:50,762 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-27 14:07:50,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:50,763 INFO L225 Difference]: With dead ends: 42 [2020-10-27 14:07:50,763 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 14:07:50,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:07:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 14:07:50,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-27 14:07:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 14:07:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-27 14:07:50,776 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2020-10-27 14:07:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:50,776 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-27 14:07:50,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:07:50,776 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-27 14:07:50,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:07:50,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:50,780 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:50,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:07:50,781 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:50,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:50,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1784961539, now seen corresponding path program 5 times [2020-10-27 14:07:50,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:50,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462221019] [2020-10-27 14:07:50,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:50,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:50,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:51,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:51,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:51,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:52,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:52,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:52,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:53,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:55,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:55,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:55,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:07:55,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:07:55,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-27 14:07:55,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:55,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:07:55,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:55,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:07:55,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:57,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:57,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:57,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:57,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:57,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:57,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:07:57,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:57,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:57,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:57,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:57,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:57,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462221019] [2020-10-27 14:07:57,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:57,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:07:57,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527748318] [2020-10-27 14:07:57,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:07:57,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:57,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:07:57,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:07:57,453 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 25 states. [2020-10-27 14:07:58,129 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-27 14:07:58,481 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-10-27 14:07:58,729 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-27 14:07:59,299 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-10-27 14:07:59,632 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-27 14:07:59,827 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2020-10-27 14:08:00,053 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-27 14:08:00,248 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-27 14:08:00,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:00,744 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2020-10-27 14:08:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:08:00,746 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2020-10-27 14:08:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:00,747 INFO L225 Difference]: With dead ends: 62 [2020-10-27 14:08:00,748 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:08:00,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=301, Invalid=1679, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:08:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:08:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-10-27 14:08:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:08:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-27 14:08:00,773 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 35 [2020-10-27 14:08:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:00,773 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-27 14:08:00,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:08:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-27 14:08:00,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:08:00,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:00,776 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:00,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:08:00,777 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:00,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:00,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1290520251, now seen corresponding path program 6 times [2020-10-27 14:08:00,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:00,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082923178] [2020-10-27 14:08:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:00,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:00,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:02,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:02,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:08:02,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:08:02,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1515 [2020-10-27 14:08:02,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:02,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:08:02,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:08:02,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:08:02,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:02,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:02,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:02,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:02,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:02,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:02,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:02,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:02,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:02,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:02,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:02,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:08:02,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082923178] [2020-10-27 14:08:02,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:02,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:08:02,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271148183] [2020-10-27 14:08:02,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:08:02,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:02,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:08:02,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:08:02,458 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2020-10-27 14:08:02,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:02,795 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2020-10-27 14:08:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:08:02,795 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-27 14:08:02,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:02,796 INFO L225 Difference]: With dead ends: 91 [2020-10-27 14:08:02,796 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 14:08:02,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:08:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 14:08:02,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-27 14:08:02,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:08:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-27 14:08:02,808 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 37 [2020-10-27 14:08:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:02,808 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-27 14:08:02,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:08:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-27 14:08:02,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:08:02,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:02,809 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:02,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:08:02,810 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:02,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:02,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2001278779, now seen corresponding path program 7 times [2020-10-27 14:08:02,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:02,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142007073] [2020-10-27 14:08:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:02,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:02,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:03,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:04,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:04,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:06,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:06,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:07,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:07,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:07,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:08:07,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:08:07,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:08:07,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:07,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:08:07,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:07,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:08:07,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:08:08,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:08,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:08,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:08,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:08,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:08,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:08,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:08,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:08,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:08,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:08,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:08,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142007073] [2020-10-27 14:08:08,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:08,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:08:08,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298370009] [2020-10-27 14:08:08,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:08:08,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:08,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:08:08,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:08:08,765 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 25 states. [2020-10-27 14:08:10,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:10,103 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-27 14:08:10,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:08:10,104 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2020-10-27 14:08:10,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:10,105 INFO L225 Difference]: With dead ends: 54 [2020-10-27 14:08:10,105 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 14:08:10,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:08:10,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 14:08:10,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 14:08:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 14:08:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-27 14:08:10,117 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2020-10-27 14:08:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:10,117 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-27 14:08:10,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:08:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-27 14:08:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:08:10,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:10,121 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:10,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:08:10,122 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:10,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:10,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1941526343, now seen corresponding path program 8 times [2020-10-27 14:08:10,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:10,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990854414] [2020-10-27 14:08:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:10,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:10,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:11,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:11,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:08:11,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:08:11,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1609 [2020-10-27 14:08:11,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:11,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:08:11,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:08:11,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:08:11,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:11,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:11,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:11,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:11,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:11,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:11,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:11,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:11,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:11,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:11,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:11,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:08:11,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990854414] [2020-10-27 14:08:11,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:11,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:08:11,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197518968] [2020-10-27 14:08:11,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:08:11,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:11,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:08:11,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:08:11,919 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 12 states. [2020-10-27 14:08:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:12,352 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-27 14:08:12,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:08:12,353 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 14:08:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:12,356 INFO L225 Difference]: With dead ends: 48 [2020-10-27 14:08:12,356 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 14:08:12,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:08:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 14:08:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 14:08:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 14:08:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-27 14:08:12,373 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2020-10-27 14:08:12,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:12,373 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-27 14:08:12,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:08:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-27 14:08:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:08:12,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:12,374 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:12,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:08:12,378 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:12,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:12,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1155598967, now seen corresponding path program 9 times [2020-10-27 14:08:12,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:12,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764750211] [2020-10-27 14:08:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:12,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:12,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:12,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:14,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:14,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:15,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:15,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:16,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:16,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:17,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:17,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:17,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:08:17,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:08:17,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5107 [2020-10-27 14:08:17,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:17,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:08:17,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:17,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:08:17,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:18,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:18,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:18,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:18,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:18,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:18,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:18,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:18,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:18,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:18,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:18,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:18,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764750211] [2020-10-27 14:08:18,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:18,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:08:18,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832233880] [2020-10-27 14:08:18,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:08:18,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:18,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:08:18,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:08:18,795 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 28 states. [2020-10-27 14:08:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:20,134 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-10-27 14:08:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:08:20,135 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 41 [2020-10-27 14:08:20,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:20,136 INFO L225 Difference]: With dead ends: 71 [2020-10-27 14:08:20,137 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 14:08:20,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:08:20,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 14:08:20,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2020-10-27 14:08:20,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:08:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-27 14:08:20,149 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 41 [2020-10-27 14:08:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:20,149 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-27 14:08:20,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:08:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-27 14:08:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:08:20,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:20,150 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:20,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:08:20,150 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:20,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:20,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1080685749, now seen corresponding path program 10 times [2020-10-27 14:08:20,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:20,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152183253] [2020-10-27 14:08:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:20,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:20,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:21,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:21,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:08:21,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:08:21,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1829 [2020-10-27 14:08:21,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:21,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:08:21,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:08:21,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:08:21,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:22,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:22,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:22,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:22,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:22,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:22,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:22,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:22,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:22,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:22,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:22,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:08:22,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152183253] [2020-10-27 14:08:22,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:22,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:08:22,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915540876] [2020-10-27 14:08:22,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:08:22,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:22,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:08:22,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:08:22,183 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 14 states. [2020-10-27 14:08:22,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:22,618 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2020-10-27 14:08:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:08:22,619 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-27 14:08:22,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:22,620 INFO L225 Difference]: With dead ends: 105 [2020-10-27 14:08:22,620 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 14:08:22,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:08:22,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 14:08:22,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-27 14:08:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 14:08:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-27 14:08:22,632 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 43 [2020-10-27 14:08:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:22,632 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-27 14:08:22,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:08:22,632 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-27 14:08:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:08:22,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:22,633 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:22,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:08:22,634 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:22,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:22,634 INFO L82 PathProgramCache]: Analyzing trace with hash 524806859, now seen corresponding path program 11 times [2020-10-27 14:08:22,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:22,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335813348] [2020-10-27 14:08:22,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:22,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:22,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:23,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:23,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:25,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:25,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:26,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:27,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:27,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:08:27,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:08:27,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:08:27,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:27,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:08:27,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:27,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:08:27,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:27,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:27,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:27,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:27,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:27,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:27,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:27,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:27,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:27,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:27,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:27,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:08:27,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335813348] [2020-10-27 14:08:27,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:27,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:08:27,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689185557] [2020-10-27 14:08:27,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:08:27,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:27,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:08:27,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:08:27,844 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 14 states. [2020-10-27 14:08:28,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:28,342 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-10-27 14:08:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:08:28,342 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-27 14:08:28,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:28,343 INFO L225 Difference]: With dead ends: 64 [2020-10-27 14:08:28,343 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 14:08:28,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:08:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 14:08:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 14:08:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:08:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-27 14:08:28,354 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2020-10-27 14:08:28,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:28,355 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-27 14:08:28,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:08:28,355 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-27 14:08:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:08:28,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:28,356 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:28,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:08:28,356 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:28,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:28,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1002476687, now seen corresponding path program 12 times [2020-10-27 14:08:28,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:28,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388180567] [2020-10-27 14:08:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:28,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:28,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:28,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:29,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:29,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:29,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:29,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:30,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:30,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:31,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:31,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:31,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:32,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:32,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:33,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:33,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:33,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:08:33,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:08:33,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-27 14:08:33,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:08:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:08:33,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:34,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:34,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:34,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:34,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:34,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:34,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:08:34,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:34,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:34,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:34,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:34,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:08:34,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388180567] [2020-10-27 14:08:34,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:34,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:08:34,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15548377] [2020-10-27 14:08:34,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:08:34,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:34,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:08:34,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:08:34,430 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 25 states. [2020-10-27 14:08:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:35,416 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-10-27 14:08:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:08:35,417 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 47 [2020-10-27 14:08:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:35,418 INFO L225 Difference]: With dead ends: 68 [2020-10-27 14:08:35,418 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 14:08:35,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:08:35,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 14:08:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2020-10-27 14:08:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:08:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-27 14:08:35,430 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2020-10-27 14:08:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:35,430 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-27 14:08:35,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:08:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-27 14:08:35,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:08:35,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:35,432 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:35,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:08:35,432 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:35,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:35,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1639186223, now seen corresponding path program 13 times [2020-10-27 14:08:35,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:35,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074754931] [2020-10-27 14:08:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:35,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:35,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:38,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:38,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:08:38,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:08:38,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2714 [2020-10-27 14:08:38,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:38,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:08:38,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:08:38,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:08:38,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:38,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:38,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:38,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:38,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:38,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:38,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:08:38,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:38,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:38,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:38,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:38,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:08:38,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074754931] [2020-10-27 14:08:38,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:38,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:08:38,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757555613] [2020-10-27 14:08:38,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:08:38,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:38,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:08:38,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:08:38,370 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 16 states. [2020-10-27 14:08:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:38,904 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2020-10-27 14:08:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:08:38,905 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-27 14:08:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:38,906 INFO L225 Difference]: With dead ends: 107 [2020-10-27 14:08:38,906 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 14:08:38,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:08:38,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 14:08:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-27 14:08:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 14:08:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-27 14:08:38,918 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2020-10-27 14:08:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:38,918 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-27 14:08:38,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:08:38,918 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-27 14:08:38,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:08:38,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:38,919 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:38,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:08:38,919 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:38,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:38,920 INFO L82 PathProgramCache]: Analyzing trace with hash 992865235, now seen corresponding path program 14 times [2020-10-27 14:08:38,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:38,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061264133] [2020-10-27 14:08:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:38,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:38,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:41,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:41,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:08:41,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:08:41,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2495 [2020-10-27 14:08:41,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:08:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:08:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:08:41,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:41,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:41,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:41,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:41,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:41,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:41,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:08:41,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:41,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:41,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:08:41,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061264133] [2020-10-27 14:08:41,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:41,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:08:41,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273030322] [2020-10-27 14:08:41,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:08:41,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:41,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:08:41,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:08:41,676 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 16 states. [2020-10-27 14:08:42,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:42,400 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-27 14:08:42,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:08:42,401 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-27 14:08:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:42,402 INFO L225 Difference]: With dead ends: 60 [2020-10-27 14:08:42,402 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 14:08:42,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:08:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 14:08:42,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-27 14:08:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 14:08:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-27 14:08:42,425 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2020-10-27 14:08:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:42,425 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-27 14:08:42,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:08:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-27 14:08:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:08:42,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:42,427 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:42,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:08:42,432 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:42,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2009110293, now seen corresponding path program 15 times [2020-10-27 14:08:42,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:42,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094554965] [2020-10-27 14:08:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:42,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:42,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:43,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:43,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:43,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:43,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:44,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:44,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:44,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:45,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:45,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:46,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:46,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:47,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:47,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:08:47,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:08:47,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:08:47,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:47,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:08:47,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:47,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:08:47,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:50,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:50,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:50,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:50,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:50,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:50,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:50,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:50,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:50,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:50,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:50,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:50,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094554965] [2020-10-27 14:08:50,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:50,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:08:50,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772657132] [2020-10-27 14:08:50,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:08:50,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:50,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:08:50,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:08:50,593 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 40 states. [2020-10-27 14:08:52,070 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-27 14:08:52,509 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-27 14:08:53,222 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-27 14:08:53,739 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-27 14:08:54,200 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-27 14:08:55,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:55,417 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2020-10-27 14:08:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 14:08:55,418 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 53 [2020-10-27 14:08:55,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:55,419 INFO L225 Difference]: With dead ends: 91 [2020-10-27 14:08:55,419 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 14:08:55,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=423, Invalid=3609, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 14:08:55,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 14:08:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2020-10-27 14:08:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 14:08:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-27 14:08:55,433 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 53 [2020-10-27 14:08:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:55,434 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-27 14:08:55,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:08:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-27 14:08:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:08:55,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:55,435 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:55,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:08:55,435 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:55,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:55,436 INFO L82 PathProgramCache]: Analyzing trace with hash -631932457, now seen corresponding path program 16 times [2020-10-27 14:08:55,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:55,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710336654] [2020-10-27 14:08:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:55,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:55,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:59,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:59,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:08:59,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:08:59,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3973 [2020-10-27 14:08:59,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:59,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:08:59,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:08:59,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:08:59,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:59,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:59,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:59,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:59,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:59,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:59,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:59,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:59,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:59,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:59,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:59,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:08:59,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710336654] [2020-10-27 14:08:59,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:59,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:08:59,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405403217] [2020-10-27 14:08:59,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:08:59,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:59,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:08:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:08:59,683 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 18 states. [2020-10-27 14:09:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:00,247 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2020-10-27 14:09:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:09:00,248 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-27 14:09:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:00,248 INFO L225 Difference]: With dead ends: 133 [2020-10-27 14:09:00,249 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 14:09:00,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:09:00,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 14:09:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2020-10-27 14:09:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 14:09:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-27 14:09:00,261 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 55 [2020-10-27 14:09:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:00,262 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-27 14:09:00,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:09:00,262 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-27 14:09:00,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:09:00,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:00,263 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:00,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:09:00,263 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:00,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:00,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1024870057, now seen corresponding path program 17 times [2020-10-27 14:09:00,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:00,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189348079] [2020-10-27 14:09:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:00,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:00,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:01,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:02,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:04,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:05,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:05,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:09:05,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:09:05,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:09:05,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:05,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 14:09:05,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:05,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 14:09:05,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:05,865 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-27 14:09:05,999 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-10-27 14:09:06,171 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2020-10-27 14:09:06,348 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2020-10-27 14:09:06,546 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2020-10-27 14:09:06,752 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-27 14:09:06,994 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-10-27 14:09:07,194 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-27 14:09:07,454 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2020-10-27 14:09:07,725 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2020-10-27 14:09:07,904 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-27 14:09:08,177 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-27 14:09:08,445 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 46 [2020-10-27 14:09:08,739 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2020-10-27 14:09:08,986 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2020-10-27 14:09:09,245 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2020-10-27 14:09:09,460 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-27 14:09:09,647 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-27 14:09:10,022 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-27 14:09:10,231 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-27 14:09:10,454 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-27 14:09:10,685 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-27 14:09:11,199 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-27 14:09:13,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:13,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:13,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:13,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:13,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:13,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:13,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:13,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:13,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:13,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:13,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:09:13,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189348079] [2020-10-27 14:09:13,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:13,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 14:09:13,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686623784] [2020-10-27 14:09:13,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 14:09:13,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:13,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 14:09:13,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1865, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 14:09:13,147 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 46 states. [2020-10-27 14:09:13,642 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 71 [2020-10-27 14:09:15,179 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 46 [2020-10-27 14:09:15,534 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-27 14:09:16,187 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 62 [2020-10-27 14:09:16,417 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-27 14:09:16,856 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 42 [2020-10-27 14:09:17,351 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 50 [2020-10-27 14:09:17,666 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 37 [2020-10-27 14:09:18,305 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 97 [2020-10-27 14:09:18,615 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 16 [2020-10-27 14:09:19,311 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 108 [2020-10-27 14:09:19,592 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 13 [2020-10-27 14:09:20,230 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 108 [2020-10-27 14:09:20,607 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 65 [2020-10-27 14:09:21,149 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 89 [2020-10-27 14:09:21,607 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2020-10-27 14:09:22,120 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2020-10-27 14:09:22,458 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-27 14:09:22,905 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2020-10-27 14:09:23,143 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-27 14:09:23,387 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 14:09:23,705 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2020-10-27 14:09:23,968 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-27 14:09:24,639 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 54 [2020-10-27 14:09:25,181 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 34 [2020-10-27 14:09:25,521 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 41 [2020-10-27 14:09:25,788 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 11 [2020-10-27 14:09:26,169 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 43 [2020-10-27 14:09:26,689 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 74 [2020-10-27 14:09:27,097 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-10-27 14:09:27,423 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-27 14:09:28,041 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-10-27 14:09:28,405 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-27 14:09:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:28,971 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-10-27 14:09:28,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-27 14:09:28,972 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 55 [2020-10-27 14:09:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:28,973 INFO L225 Difference]: With dead ends: 108 [2020-10-27 14:09:28,973 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 14:09:28,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1868 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=916, Invalid=7274, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 14:09:28,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 14:09:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-27 14:09:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 14:09:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-10-27 14:09:28,991 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 55 [2020-10-27 14:09:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:28,991 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-10-27 14:09:28,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 14:09:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-10-27 14:09:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:09:28,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:28,992 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:28,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:09:28,992 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:28,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:28,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1470200665, now seen corresponding path program 18 times [2020-10-27 14:09:28,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:28,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699930370] [2020-10-27 14:09:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:29,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:29,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:33,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:33,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:09:33,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:09:33,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4780 [2020-10-27 14:09:33,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:33,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:09:33,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:09:33,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:09:33,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:34,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:34,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:34,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:34,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:34,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:34,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:34,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:34,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:34,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:34,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:34,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 14:09:34,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699930370] [2020-10-27 14:09:34,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:34,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:09:34,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376522806] [2020-10-27 14:09:34,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:09:34,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:34,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:09:34,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:09:34,062 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 18 states. [2020-10-27 14:09:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:34,934 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2020-10-27 14:09:34,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:09:34,935 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-10-27 14:09:34,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:34,936 INFO L225 Difference]: With dead ends: 96 [2020-10-27 14:09:34,936 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 14:09:34,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:09:34,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 14:09:34,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2020-10-27 14:09:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 14:09:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-27 14:09:34,947 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2020-10-27 14:09:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:34,948 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-27 14:09:34,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:09:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-27 14:09:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:09:34,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:34,949 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:34,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:09:34,949 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1166957851, now seen corresponding path program 19 times [2020-10-27 14:09:34,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:34,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120773364] [2020-10-27 14:09:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:34,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:35,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:35,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:36,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:36,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:37,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:38,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:39,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:39,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:39,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:39,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:09:39,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:09:39,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:09:39,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:39,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:09:39,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:39,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 14:09:39,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:41,058 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-27 14:09:43,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:43,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:43,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:43,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:43,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:43,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:43,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:43,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 14:09:43,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120773364] [2020-10-27 14:09:43,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:43,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:09:43,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373250171] [2020-10-27 14:09:43,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:09:43,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:43,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:09:43,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1178, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:09:43,261 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 36 states. [2020-10-27 14:09:43,536 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-27 14:09:44,138 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 14:09:45,963 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2020-10-27 14:09:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:48,011 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2020-10-27 14:09:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:09:48,013 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 59 [2020-10-27 14:09:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:48,014 INFO L225 Difference]: With dead ends: 85 [2020-10-27 14:09:48,014 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 14:09:48,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=240, Invalid=3066, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 14:09:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 14:09:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2020-10-27 14:09:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:09:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-10-27 14:09:48,027 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2020-10-27 14:09:48,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:48,027 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-10-27 14:09:48,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:09:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-10-27 14:09:48,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:09:48,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:48,028 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:48,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:09:48,028 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:48,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:48,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1808389725, now seen corresponding path program 20 times [2020-10-27 14:09:48,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:48,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021020875] [2020-10-27 14:09:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:48,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:48,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:53,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:53,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:09:53,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:09:53,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:09:53,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:53,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:09:53,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:09:53,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:09:53,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:53,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:53,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:53,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:53,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:53,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:53,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:53,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:53,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:53,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:53,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:53,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 14:09:53,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021020875] [2020-10-27 14:09:53,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:53,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:09:53,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759265190] [2020-10-27 14:09:53,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:09:53,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:53,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:09:53,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:09:53,402 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 20 states. [2020-10-27 14:09:54,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:54,156 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2020-10-27 14:09:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:09:54,157 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2020-10-27 14:09:54,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:54,158 INFO L225 Difference]: With dead ends: 131 [2020-10-27 14:09:54,158 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 14:09:54,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:09:54,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 14:09:54,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2020-10-27 14:09:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 14:09:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-27 14:09:54,169 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2020-10-27 14:09:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:54,169 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-27 14:09:54,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:09:54,169 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-27 14:09:54,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:09:54,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:54,170 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:54,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:09:54,170 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:54,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:54,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1220735393, now seen corresponding path program 21 times [2020-10-27 14:09:54,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:54,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635074301] [2020-10-27 14:09:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:54,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:54,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:59,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:59,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:09:59,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:09:59,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:09:59,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:59,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:09:59,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:09:59,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:09:59,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:59,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:59,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:59,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:59,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:59,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:59,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:59,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:59,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:59,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:59,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:59,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 14:09:59,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635074301] [2020-10-27 14:09:59,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:59,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:09:59,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982036895] [2020-10-27 14:09:59,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:09:59,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:59,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:09:59,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:09:59,540 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 20 states. [2020-10-27 14:10:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:00,618 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-27 14:10:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:10:00,620 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-10-27 14:10:00,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:00,620 INFO L225 Difference]: With dead ends: 72 [2020-10-27 14:10:00,620 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:10:00,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=1028, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:10:00,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:10:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-27 14:10:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:10:00,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-27 14:10:00,636 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2020-10-27 14:10:00,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:00,636 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-27 14:10:00,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:10:00,637 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-27 14:10:00,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:10:00,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:00,637 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:00,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:10:00,638 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:00,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:00,638 INFO L82 PathProgramCache]: Analyzing trace with hash 747718305, now seen corresponding path program 22 times [2020-10-27 14:10:00,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:00,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871832022] [2020-10-27 14:10:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:00,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:01,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:01,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:03,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:04,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:05,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:05,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:05,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:05,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:10:05,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:10:05,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-27 14:10:05,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:05,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 14:10:05,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:05,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 14:10:05,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:11,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:11,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:11,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:11,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:11,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:11,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:10:11,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:11,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:11,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:11,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:11,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 42 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:10:11,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871832022] [2020-10-27 14:10:11,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:11,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 14:10:11,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238648919] [2020-10-27 14:10:11,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 14:10:11,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:11,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 14:10:11,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1955, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:10:11,093 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 48 states. [2020-10-27 14:10:12,334 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-27 14:10:12,857 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-27 14:10:13,329 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-27 14:10:13,745 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-27 14:10:14,200 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-10-27 14:10:14,954 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2020-10-27 14:10:16,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:16,420 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2020-10-27 14:10:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 14:10:16,421 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 65 [2020-10-27 14:10:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:16,423 INFO L225 Difference]: With dead ends: 117 [2020-10-27 14:10:16,423 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 14:10:16,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=564, Invalid=3726, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 14:10:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 14:10:16,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2020-10-27 14:10:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:10:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-10-27 14:10:16,437 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 65 [2020-10-27 14:10:16,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:16,437 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-10-27 14:10:16,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 14:10:16,437 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-10-27 14:10:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:10:16,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:16,437 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:16,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:10:16,438 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:16,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:16,438 INFO L82 PathProgramCache]: Analyzing trace with hash -358547933, now seen corresponding path program 23 times [2020-10-27 14:10:16,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:16,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112672750] [2020-10-27 14:10:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:16,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:16,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:21,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:21,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:10:21,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:10:21,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:10:21,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:21,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:10:21,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:10:21,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:10:21,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:21,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:21,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:21,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:21,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:21,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:21,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:21,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:21,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:21,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:21,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:21,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 14:10:21,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112672750] [2020-10-27 14:10:21,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:21,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:10:21,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47017431] [2020-10-27 14:10:21,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:10:21,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:21,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:10:21,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:10:21,901 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 22 states. [2020-10-27 14:10:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:23,390 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2020-10-27 14:10:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:10:23,392 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-10-27 14:10:23,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:23,393 INFO L225 Difference]: With dead ends: 114 [2020-10-27 14:10:23,393 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 14:10:23,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=393, Invalid=1329, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:10:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 14:10:23,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-27 14:10:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 14:10:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-27 14:10:23,407 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2020-10-27 14:10:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:23,407 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-27 14:10:23,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:10:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-27 14:10:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:10:23,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:23,408 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:23,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:10:23,408 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:23,408 INFO L82 PathProgramCache]: Analyzing trace with hash 381179237, now seen corresponding path program 24 times [2020-10-27 14:10:23,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:23,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375787846] [2020-10-27 14:10:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:23,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:23,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:27,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:28,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:28,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:10:28,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:10:28,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:10:28,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:28,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-27 14:10:28,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:28,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 14:10:28,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:29,408 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-27 14:10:29,575 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-27 14:10:30,879 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-27 14:10:31,082 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-27 14:10:32,583 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-27 14:10:32,805 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-27 14:10:35,155 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-27 14:10:37,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:37,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:37,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:37,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:37,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:37,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:37,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:37,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:37,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:37,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:37,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:10:37,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375787846] [2020-10-27 14:10:37,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:37,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 14:10:37,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085953353] [2020-10-27 14:10:37,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 14:10:37,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:37,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 14:10:37,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=3021, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 14:10:37,257 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 58 states. [2020-10-27 14:10:41,053 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 94 [2020-10-27 14:10:41,338 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-27 14:10:42,099 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 82 [2020-10-27 14:10:42,537 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-27 14:10:43,723 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 95 [2020-10-27 14:10:44,651 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 104 [2020-10-27 14:10:45,347 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 86 [2020-10-27 14:10:46,244 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 110 [2020-10-27 14:10:46,905 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 96 [2020-10-27 14:10:47,650 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 101 [2020-10-27 14:10:48,279 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-27 14:10:48,745 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-10-27 14:10:49,590 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-27 14:10:50,758 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 95 [2020-10-27 14:10:51,477 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2020-10-27 14:10:52,057 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 79 [2020-10-27 14:10:52,594 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 14:10:53,092 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-27 14:10:53,557 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-27 14:10:54,170 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2020-10-27 14:10:54,701 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-10-27 14:10:55,210 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-27 14:10:55,696 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-27 14:10:56,158 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-27 14:10:57,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:57,018 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-10-27 14:10:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-27 14:10:57,019 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 69 [2020-10-27 14:10:57,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:57,020 INFO L225 Difference]: With dead ends: 118 [2020-10-27 14:10:57,020 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 14:10:57,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=837, Invalid=8283, Unknown=0, NotChecked=0, Total=9120 [2020-10-27 14:10:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 14:10:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 95. [2020-10-27 14:10:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 14:10:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-27 14:10:57,046 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 69 [2020-10-27 14:10:57,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:57,046 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-27 14:10:57,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 14:10:57,046 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-27 14:10:57,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:10:57,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:57,047 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:57,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:10:57,047 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:57,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1705581529, now seen corresponding path program 25 times [2020-10-27 14:10:57,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:57,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134471928] [2020-10-27 14:10:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:57,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:57,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:58,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:58,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:02,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:02,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:11:02,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:11:02,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:11:02,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:02,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:11:02,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:11:02,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:11:02,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:02,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:02,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:02,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:02,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:02,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:02,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:11:02,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:02,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:02,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:02,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:02,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 14:11:02,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134471928] [2020-10-27 14:11:02,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:11:02,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:11:02,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388126512] [2020-10-27 14:11:02,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:11:02,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:02,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:11:02,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:11:02,598 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 24 states. [2020-10-27 14:11:04,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:04,028 INFO L93 Difference]: Finished difference Result 178 states and 187 transitions. [2020-10-27 14:11:04,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:11:04,030 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-10-27 14:11:04,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:04,031 INFO L225 Difference]: With dead ends: 178 [2020-10-27 14:11:04,031 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 14:11:04,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=432, Invalid=1460, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:11:04,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 14:11:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 116. [2020-10-27 14:11:04,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 14:11:04,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2020-10-27 14:11:04,059 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 71 [2020-10-27 14:11:04,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:04,059 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2020-10-27 14:11:04,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:11:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2020-10-27 14:11:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:11:04,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:04,060 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:04,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:11:04,060 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:04,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1260958631, now seen corresponding path program 26 times [2020-10-27 14:11:04,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:04,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695601637] [2020-10-27 14:11:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:04,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:05,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:05,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:06,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:07,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:08,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:09,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:09,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:11:09,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:11:09,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:11:09,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:09,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 14:11:09,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:11:09,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 14:11:09,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:11,108 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-27 14:11:11,358 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-27 14:11:15,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:15,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:15,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:15,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:15,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:15,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:11:15,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:15,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:15,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:15,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:15,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 14:11:15,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695601637] [2020-10-27 14:11:15,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:11:15,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 14:11:15,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703671427] [2020-10-27 14:11:15,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 14:11:15,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:15,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 14:11:15,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1794, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:11:15,703 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 44 states. [2020-10-27 14:11:16,129 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-27 14:11:17,074 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 14:11:21,120 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 117